[Repeater-Builder] Re: MSR2000 PL during COR with TRN5073A

[kk2ed]

I believe Pin 14 on the PL board is the encode disable pin. Simply grounding 
this pin disables the encoder.  You can also find a COS signal at pin 5 of the 
squelch gate slot.  It is active high. 

Using two NPN transistors, and a few 10k resistors, you can have the COS drive 
the first transistor, which will pull it's collector low during rx activity, 
and turn off the second NPN. When there is no COS activity, the second NPN will 
be biased on, and it's collector will pull the pin 14 encode disable pin low.

Eric
K2WD


--- In Repeater-Builder@yahoogroups.com, "Eric"  wrote:
>
> Hello,
> 
> Is there a way to configure the TRN5073A PL board to TX PL only during COR ? 
> Actually, PL is always ON, even during the dropout delay.
> 
> I don't have the TRN5073A schematic, only for the TRN5075A. 
> 
> Q201, Q202 and some resistors/diode are missing on my board. Guess I need 
> them to control the PL ??
> 
> Sincerely,
> Eric VE2TSO
>

[Repeater-Builder] Re: TLE1714A PA Mod to 440 MHz?

[kk2ed]

Just put it on the air and run with it.  I have been using a TLE1714A PA on 
445MHz for over 15 years, and it actually puts out a little more than some of 
the 1713's I have used.   I never did any "down-banding" mods to it, as it has 
played well as is.  Efficiency is no worse than the 1713s at 440MHz.

As with any Micor PA, put a few fans on it, and it will last forever.

Eric
K2WD


--- In Repeater-Builder@yahoogroups.com, "Lou"  wrote:
>
> Hello,
>   I have a TLE1714A PA (470-512 MHz) That I would like to use for my Repeater 
> on 449 MHz. I see in the manual there is a few capacitor, transistor and 
> inductor changes compared to the TLE1713A PA (450-470 MHz ) PA. I also noted 
> the microstrip is a different part number and can see there are changes in 
> the stripline compared to the TLE1714A. Has anyone successfully modified the 
> TLE1714A to operate on the upper end of the 440 band?
> 
>   Thanks,
>  Louie   KA2PFL
>

[Repeater-Builder] FS: Link Comm RLC-DSP404 controllers

[kk2ed]

For sale:

Two brand new never used Link Comm RLC-DSP404 repeater controllers.  Tested and 
latest firmware installed. Never mounted or taken out of my shop, so no 
scratches on them. The units have been sitting in their boxes on a shelf.  All 
the supplied accessories (cables, connectors, etc.) are still sealed.

I bought these new awhile back with the intention of linking some of my sites 
via IP, but the project has been scrapped.

$1265 each shipped ground conus. Both for $2430 shipped. 


Eric
K2WD

[Repeater-Builder] Re: Looking for Vicor dc-dc converter module for IFR repair

[kk2ed]

There is no room to do so. Actually, not much room to do anything other than 
the original design.  More importantly, I don't want to butcher up an expensive 
piece of quality test gear. 

Eric
K2WD

--- In Repeater-Builder@yahoogroups.com, "skipp025"  wrote:
>
> If you're worried about the ratings of the unit seen on 
> Ebay, you can parallel two of them (paying attention to 
> the details of doing said) if size (mounting space) 
> allows. 
> 
> s. 
> 
> > "kk2ed"  wrote:
> >
> > I tried eBay - there is one available which is close, but the wattage (and 
> > therefore current) rating is too low. The one I need is rated 200w, whereas 
> > the one on eBay is only 150w.  I could use it in a pinch, but the monitor 
> > draws pretty close to 10A (150w) continuous, and I don't want to be 
> > replacing the module anytime soon again, as it is a real PITA to get to. 
> > 
> > I also fired off an email to the IFR guy in Wichita to see if he has any in 
> > stock.
> > 
> > Meanwhile, I have sourced a few out of China for a reasonable cost, 
> > although shipping will be as much as the part!  Anyone interested in a few 
> > spares if I go that route?
> > 
> > Thanks for the responses.
> > 
> > Eric
> > K2WD
> > 
> > 
> > Thanks for the suggestion.
> > 
> > --- In Repeater-Builder@yahoogroups.com, mpavlica  wrote:
> > >
> > > Try on ebay.com i found them recently. And there they can be MUCH cheaper 
> > > than buying new one...
> > > 
> > > - Originalna poruka -
> > > Po¨iljalac: wspx472 
> > > Datum: Utorak, Januar 12, 2010 14:39
> > > Tema: [Repeater-Builder] Re: Looking for Vicor dc-dc converter module for 
> > > IFR repair
> > > Primalac: Repeater-Builder@yahoogroups.com
> > > 
> > > > Actually, that's not goofy at all. Quite common, actually to 
> > > > step up the rectified line voltage, then step it down again. I 
> > > > have encountered the same problem with out of production parts. 
> > > > Seems there are folks who attempt to buy up remaining quantities 
> > > > of obsolete parts and re sell them at a premium. I remember 
> > > > paying $2.50 a piece for some 1/8 watt carbon comp resistors a 
> > > > few years ago. Ridiculous.
> > > > 
> > > > 
> > > > 
> > > > --- In Repeater-Builder@yahoogroups.com, DCFluX  wrote:
> > > > >
> > > > > Sounds like a goofy design, the only reason you'd do something 
> > > > like that was
> > > > > because a world voltage input SMPS didn't exist.
> > > > > 
> > > > > Is the 300 volts used for some other purpose like the monitor?
> > > > > 
> > > > > If not I'd replace the 2 modules with a single 15V 200W SMPS 
> > > > such as the
> > > > > Meanwell SP-240-15, assuming it would fit in the serivce 
> > > > monitor, never seen
> > > > > the inside of one.
> > > > >
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > Yahoo! Groups Links
> > > > 
> > > > 
> > > >
> > >
> >
>

[Repeater-Builder] Re: Looking for Vicor dc-dc converter module for IFR repair

[kk2ed]

I tried eBay - there is one available which is close, but the wattage (and 
therefore current) rating is too low. The one I need is rated 200w, whereas the 
one on eBay is only 150w.  I could use it in a pinch, but the monitor draws 
pretty close to 10A (150w) continuous, and I don't want to be replacing the 
module anytime soon again, as it is a real PITA to get to. 

I also fired off an email to the IFR guy in Wichita to see if he has any in 
stock.

Meanwhile, I have sourced a few out of China for a reasonable cost, although 
shipping will be as much as the part!  Anyone interested in a few spares if I 
go that route?

Thanks for the responses.

Eric
K2WD


Thanks for the suggestion.

--- In Repeater-Builder@yahoogroups.com, mpavlica  wrote:
>
> Try on ebay.com i found them recently. And there they can be MUCH cheaper 
> than buying new one...
> 
> - Originalna poruka -
> Po¨iljalac: wspx472 
> Datum: Utorak, Januar 12, 2010 14:39
> Tema: [Repeater-Builder] Re: Looking for Vicor dc-dc converter module for IFR 
> repair
> Primalac: Repeater-Builder@yahoogroups.com
> 
> > Actually, that's not goofy at all. Quite common, actually to 
> > step up the rectified line voltage, then step it down again. I 
> > have encountered the same problem with out of production parts. 
> > Seems there are folks who attempt to buy up remaining quantities 
> > of obsolete parts and re sell them at a premium. I remember 
> > paying $2.50 a piece for some 1/8 watt carbon comp resistors a 
> > few years ago. Ridiculous.
> > 
> > 
> > 
> > --- In Repeater-Builder@yahoogroups.com, DCFluX  wrote:
> > >
> > > Sounds like a goofy design, the only reason you'd do something 
> > like that was
> > > because a world voltage input SMPS didn't exist.
> > > 
> > > Is the 300 volts used for some other purpose like the monitor?
> > > 
> > > If not I'd replace the 2 modules with a single 15V 200W SMPS 
> > such as the
> > > Meanwell SP-240-15, assuming it would fit in the serivce 
> > monitor, never seen
> > > the inside of one.
> > >
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > Yahoo! Groups Links
> > 
> > 
> >
>

[Repeater-Builder] Looking for Vicor dc-dc converter module for IFR repair

[kk2ed]

Good Evening,


I am in the process of repairing an IFR COM120 service monitor's power supply, 
and determined the problem to be a bad dc-dc converter module. Troubleshooting 
and repairing it is the easy part - locating the needed component is the hard 
part!  

IFR is of no help, only wanting to sell a new $1k++ power supply assemnbly, or 
repair the whole monitor for big bucks.  The problem has been traced to a 
failed VICOR VI-262-EU dc-dc converter module.  

Basically, the power supply is designed around two key Vicor modules - First, a 
Vicor AIM module which takes 100-240vAC input and converts it to 300vDC.  This 
300vDC is then fed into a Vicor VI-262-EU DC-DC converter, which supplies 15vDC 
@ 200w  (13a) to the rest of the custom IFR supply. This 15v output is then fed 
to a relay network which selects between the converted AC supply, the internal 
battery (if so equipped), or finally an external +12vdc via a Powerpole jack.

>From the number of IFR power supply failures I have heard of (or have seen on 
>Ebay listings) this is a common failure mode.  Fortunately, the monitors still 
>work when fed via the 12vDC input (which basically bypasses the two 
>aforementioned modules).

I have tried to purchase the module without much luck.  Vicor will sell direct, 
but has a long lead time, as the part is made to order.  I have found a number 
of equipment brokers who will quote quantity purchases, but no single units. 
Plus, their "fees" are exhorbinent for a single unit purchase.

Anyone have any surplus Vicor VI-262-EU modules lying around?

Another option is to purchase a quantity of them. Anyone interested in 
purchasing spares for their IFR units?

Eric
K2WD


 

[Repeater-Builder] Re: Mastr2 19C320671G2 Intercom board info?

[kk2ed]

When you have a free moment, a scan of the lbi would be greatly appreciated. 
Something is better than nothing, even mo' better when it's something for free!


Thanks
Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
>
> Eric,
> 
> My GE microfiche reveals that LBI-4831, -30951, and -30965 contain
> information about the 19C320671G2 module.  Alas, none of these LBIs is on
> the RBTIP GE listing.  If you are unable to find any of the stated LBIs, I
> may be able to extract a (barely-readable) schematic directly from the
> microfiche.  It won't be pretty, but it may meet your needs.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed
> Sent: Thursday, December 17, 2009 6:41 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info?
> 
>   
> 
> Can anyone point me to an LBI for the following GE MastrII board?
> 19C320671G2 Intercom module
> 
> I would like to review a schematic of this board and see how I can utilize
> it to source filtered/de-emphasized receive audio.
> 
> Thanks
> Eric
> KE2D
>

[Repeater-Builder] Re: Mastr2 19C320671G2 Intercom board info?

[kk2ed]

Thanks for the fast reply, Eric.  I also spent the past hour or so downloading 
and reviewing various LBIs, only to reach your same conclusion. Google and 
Yahoo only yielded a few classified listings of boards for sale, and one 9-land 
ham has a few pics of one in his 6m conversion project.

Probing around with the COM120B, a scope probe, and the remaining LBIs,  it 
looks like it takes the post-pl filter de-emphasized audio just before the 
speaker amplifier, then squelch-gates it, and provides it at a proper level to 
drive a 600 ohm circuit, or something close, as used in remote voting receiver 
apps. I noticed it provided a nice receive audio source for an external 
controller at pin P931-15 (Audio To Line), but I would like to really see what 
exactly is taking place before I commit to using it. 

Currently, for my conversions, I have been taking rx audio from the IFAS board 
pin 16, which is downstream from the vol/sq high side, after it has been thru 
the volume control (in the case of the station units, a fixed pot on the main 
board, then thru the pl filter/high pass/de-emph filter.  It provides a nice 
quality filtered and de-emph'ed rx audio source, although it is not squelch 
gated.  Not an issue with most controllers, however.  In fact, preferred when 
"COR or PL" mode is used. I simply solder a jumper on the A901 System Board 
from IFAS pin 16 (RX PA) to point H59, which is hardwired to SPARE J932-5, 
providing a rf feedthrough out of the rf deck alongside the rest of the needed 
external controller signals (ptt, tx audio, cos, pl detect, etc..).  I simply 
set the fixed volume pot on the system board so as to obtain 1v pp (.353v rms) 
at J932-5.  Then, if someone wants to vary the volume at the monitor speaker, 
simply use the low-mid-high and rec1-off-rec2 switches on the control shelf, 
rather than touching the pot on the system board inside the rf deck tray.

Eric
KE2D
 

--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
>
> Eric,
> 
> My GE microfiche reveals that LBI-4831, -30951, and -30965 contain
> information about the 19C320671G2 module.  Alas, none of these LBIs is on
> the RBTIP GE listing.  If you are unable to find any of the stated LBIs, I
> may be able to extract a (barely-readable) schematic directly from the
> microfiche.  It won't be pretty, but it may meet your needs.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed
> Sent: Thursday, December 17, 2009 6:41 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Mastr2 19C320671G2 Intercom board info?
> 
>   
> 
> Can anyone point me to an LBI for the following GE MastrII board?
> 19C320671G2 Intercom module
> 
> I would like to review a schematic of this board and see how I can utilize
> it to source filtered/de-emphasized receive audio.
> 
> Thanks
> Eric
> KE2D
>

[Repeater-Builder] GE MastrII CAS vs. RUS vs. RX Mute?

[kk2ed]

After looking over the LBIs and performing a few conversions, I have a question 
regarding which everyone feels is the best source for a CAS signal into a 
repeater controller - CAS, RUS, or RX Mute.

In regards to a COS source, I see a number of publications and sites recommend 
CAS, then I see a few others using RUS, and looking at the schematics, it 
appears RX Mute may not be a bad choice also.

As originally configured, per the LBIs, a Channel Guard configured MastrII 
would trigger CAS with a carrier squelch signal, and RUS would only go active 
with the proper PL tone present. But once the Channel Guard board is removed, 
is one any better than the other for cos usage?

Assuming C630 is in place on the IFAS board, does only one of the above sources 
afford the dual speed squelch action, and the others not, or do all three 
provide the same dual-speed muting action? Looking at the IFAS schematic and 
squelch chip block diagram, it is not very clear.

Also assume the PL detect signal has been isolated from the squelch circuit, 
and only feeds the external repeater controller, so there would be no 
interaction regardless of PL being present or not (similar to removing JU202 on 
a Micor A&S board to isolate pl from causing the squelch chip into long mode 
whenever pl is present).


Eric
KE2D

[Repeater-Builder] Mastr2 19C320671G2 Intercom board info?

[kk2ed]

Can anyone point me to an LBI for the following GE MastrII board?
19C320671G2 Intercom module

I would like to review a schematic of this board and see how I can utilize it 
to source filtered/de-emphasized receive audio.

Thanks
Eric
KE2D

[Repeater-Builder] FS: RLS-DSP404 controllers

[kk2ed]

For sale: 

Two brand new Link Comm DSP-404 4-port repeater controllers.

I bought these brand new from Link awhile back, and never got around to 
installing them at my repeater sites. They have never been used, other than to 
recently flash them with the latest firmware. Otherwise they have been sitting 
in the box on a shelf in my workshop. Not a mark on them; the connectors, 
cables, and accessories are all still sealed in the bags the way they came from 
Link.  

The controller currently sells for $1500.  I'll take $1250 each plus shipping 
from zip 08050.

I also have some nice clean 2m VHF GE MastrII 110w cont. duty repeaters 
available. SC76xx comb. #s, complete with matching power supplies (35a). 
Turn-key, crystaled to your pair, tuned, and wired for a controller of your 
choice - $550 plus shipping.



Eric
KE2D
k...@comcast.net
609-713-3742

[Repeater-Builder] Wanted: IFR COM-120B service manual

[kk2ed]

Anyone have a service manual for an IFR COM-120B?   I am in need of a schematic 
for the internal power supply module.  IFR wants big bucks for a manual, and 
Google searches have been fruitless.


Thanks
Eric
KE2D

[Repeater-Builder] Re: Icom RP-1520 TX PL re-enable

[kk2ed]

--- In Repeater-Builder@yahoogroups.com, "kc2eus"  wrote:
>
> Hi,
> I added an external controller to our club's repeater. I used the 
> instructions found on the RB website to disable the internal controller.
> 
> What that paper does not cover is how to re activate the TX PL tone. Does 
> anyone happen to know how to get that working again ?
> 
> TIA
> Andrew
> KC2EUS / GM1YMI
>

It's been a few years since I played with the 1520/4020 units, but if memory 
serves me correctly, you'll need to enter in the DTMF command to tell the 
internal controller to enable the pl encoder.  The internal factory controller 
also controls the state of the tx's pl encoder. Each time the power is reset to 
the RP1520, you'll have to go through the procedure of entering the command. 
The other option is to study the schematic and permanently set the logic state 
between the CPU and encoder chip.

Hopefully you only disconnected the "TX" side of the internal controller (ie: 
tx ptt and tx audio), and left the factory controller still attached, so as to 
decode incoming dtmf tones. 



Eric
KE2D

[Repeater-Builder] FS: LDG RVS-8 voter

[kk2ed]

For sale: 

LDG RVS-8 voter.

Unit in working condition. A little dusty from years at a site. The only minor 
issue is that the top cover is missing. 

$220 shipped.

Eric
KE2D
609-713-3742

[Repeater-Builder] FS: Scom 7K, NHRC DADM

[kk2ed]

For Sale:

Scom 7K repeater controller
LED front panel
Speech Synthesizer Module
NO patch module, NO dadm installed.
Latest firmware V2.03B
Manual on CD.

Unit has the normal scratches from being installed in a repeater rack, but not 
abused. No mods or repairs to the boards, and it works perfectly. Pics 
available to interested parties.
$425 shipped ground


NHRC DADM digital audio delay module. 
$60 shipped usps.



Eric
KE2D
609-713-3742

[Repeater-Builder] FS: RLC-3, RLC-2, DVR-1

[kk2ed]

For Sale:

Link Comm RLC-3 controller
Includes 7 radio cards total – one newer single DB9 style card, and 6 older 
dual (separate 
radio/serial) DB9 style cards. Also includes two analog/IO cards. All cards 
have latest firmware eproms, and the main board has the latest v2.15 firmware. 
$1200 plus shipping.

Link Comm DVR-1
Max memory installed, latest version firmware (V1.52?) installed. In factory 
rack mount case
$200 plus shipping.

Link Comm RLC-2A
Latest version firmware installed (V4.30).  Right now it has the Icom version 
V4.30 installed, but I can reprogram the eprom to either Kenwood or Yaesu 
remote base upon request. In factory rack mount case (non-display version). 
$500 plus shipping.


Eric
KE2D
609-713-3742

 

[Repeater-Builder] FS: KTM FMC0.5B Isocoupler

[kk2ed]

FS: KTM Model FMC-0.5B Isocoupler

Brand new in the box. Currently tuned for 152-153MHz. Can be retuned for ham 
band.  Perfect to install your repeater antenna on an AM broadcast tower.



Eric
KE2D

[Repeater-Builder] Re: Service Monitor Question

[kk2ed]

I second Jeff's comments. 

The 8920A/B series are much better than almost all IFR monitors, with the 
exception being the COM120B. To put it in simple terms, the HP 8920 is the 
Cadillac of monitors, while the COM120B is the Mercedes.

I've owned a Motorola 2670A, an HP 8920A, and an IFR COM120B.  The 120B is by 
far the best service monitor. It is the most flexible, especially when setting 
up repeater links and multiple-banded systems. It also has an excellent 
analyzer and oscilloscope function.  But when they break, be prepared to be 
raped by IFR/Aeroflex. Either them or nobody. Just try finding tech docs on the 
web for an IFR. On the other hand, the HP tech docs are easily found on 
Agilent's web site, among other places, and there are many folks like Amtronix 
who are happy to sell you a replacement module, or repair your unit for you at 
reasonable rates.

I'll give you a prime example- one of my field tech's COM120B recently died. 
Sent it to Aeroflex. Bad power supply, and a few other minor issues. They 
wanted almost $4k to repair it. I called and spoke to their supervisor, in an 
attempt to have him justify the high cost. In so many words, I told them to 
keep it, and turned around and bought my tech a clean loaded HP 8920A for 
around $2500.  And even that price was high, as I bought it with a recent 
calibration and decent warranty from a reputable equipment broker. But for ham 
use, there have been some awesome deals on eBay lately. I've seen decent 
well-equipped 8920As (HS,signaling, tracking gen, etc) going for $1500 or less. 
And 8920Bs are going for less than $2500 at times. Don't worry too much about a 
unit having recent calibration - I've compared units last calibrated in 1999 
against recently calibrated units (including a brand new GD unit) and they were 
all close enough for simulcast work. Not enought to justify calibration costs 
for most work. 

The secret is to not be in a rush - check eBay regularly, and you'll find a 
decent HP every now and then.  Or if the budget allows, you can regularly find 
a nice IFR COM120B for around $3-4k (depending on options). With the current 
economy and job market, the prices on test equipment has eroded greatly in 
recent months. 

Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Jeff DePolo"  wrote:
>
> 
> I'd be leaning toward an HP.  Even if you have to pay a little more up
> front, you'll come out ahead of the game in the long run.  I have three HP's
> (two 8920B's and an 8921A, with various options), and in the last ten years
> or so, only once have I had to get one of them repaired (spectrum analyzer
> self-test wasn't passing).  
> 
> Up until fairly recently I also had an IFR 1500 (I think I got it in 1993 or
> thereabouts).  While I loved the 1500 in my regards, it became too expensive
> to continue to repair.  The death knell for it was when the CRT died (the
> original CRT's are NLA, Aeroflex wanted something like $2200 to install a
> different CRT and replace the power supply with a different type that was
> compatible with the new CRT).  Thanks but no thanks...
> 
> Unless they're abused, the HP's require little maintenance.  I check the
> reference oscillator every few months (using a rubidium standard), and it's
> always right on, usually less than one Hertz error when generating a carrier
> at 500 MHz (all of my HP's have the 001 high-stab option; I can't comment on
> the standard oscillator).  I usually send them in about every two years for
> calibration just so I can sleep at night, but usually no adjustments are
> required to pass cal.
> 
> To summarize, keep in mind repair costs when making a decision, as repair
> and cal are unavoidable costs, so choose a unit that is affordable not only
> today but through its expected lifespan as well.  You might call a few
> reputable repair outfits and/or the manufacturers and ask about calibration
> costs, maybe get a price on replacing a power supply or CRT, etc. just to
> get a feel for what you might expect for each of the models you're
> considering.
> 
> I've owned or used other IFR's, Motorolas, Cushmans, and the Ramsey.  I'll
> stick with HP.  To quote Dave Karr, "they just work".  
> 
> I highly recommend Amtronix for HP repairs and sales.  Rick at Amtronix is
> top notch and his repair rates are quite reasonable.  He also has a good
> stock of spare parts, both new and used.
> 
>   --- Jeff WN3A
> 
> 
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com 
> > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of 
> > kt...@...
> > Sent: Monday, July 13, 2009 9:46 PM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: [Repeater-Builder] Re: Service Monitor Question
> > 
> > 
> > 
> > Thanks for the responses so far. I didn't mean to incide a 
> > war over this, but the going rate for an IFR 1200S is around 
> > $4,000 - the reason I'm looking for a less expensive option.
> > 
> > If anyone can speak about Cus

[Repeater-Builder] Re: Micor Bi-Level Squelch Circuit

[kk2ed]

Alex,

You most likely need to change a few resistors and maybe a cap or two in the 
squelch circuit of the SpectraTac's A/S card.  The components will be near the 
M7716 chip. If I recall correctly, some of the parts involve the chip's timing, 
while others tailor the discriminator audio to compensate for the variations in 
white noise between the bands. 

A few years back I took a 70MHz SpectraTac chassis and replaced the 70MHz RF/IF 
board with a 147MHz receiver, and I had the opposite effect - before 
modification, the squelch would be extremely loose, and almost never go into 
the short tail mode.  I changed a few resistors and caps to the appropriate 
band-specific values, and it began working like a regular Micor A/S board. 

The best thing would be to try and dig up one of the paging " Spectra-Tac 
Receiver" manuals that used to come with some of the paging stations. This one 
manual contained the tech docs for almost every band version RF/IF board, and 
the various versions of the corresponding A/S boards.  If I recall correctly, 
there were three or four versions of the Spectra-Tac A/S boards - one for low 
band, one for VHF/UHF, and one for 800/900.  

If the values for the 70MHz mid-band version don't quite fix it entirely, 
simply compare the difference in values between the VHF and mid-band versions, 
and you should be able to calculate the appropriate values for low band 
accordingly. 

If you have trouble securing said manual, let me know and when I get back to my 
office, I'll see if I have an extra copy I can give you.

Eric
KE2D
 

--- In Repeater-Builder@yahoogroups.com, "kq2h"  wrote:
>
> --- In Repeater-Builder@yahoogroups.com, "Thomas Oliver"  wrote:
> >
> Tom, the receiver and squelch appear to operate normally when using a service 
> monitor to generate signal. Noise floor issues can certainly be a problem, 
> although a Motrac receiver works fine on the same exact antenna. It's getting 
> blasted by the same noise...
> 
> 
> 
> > I wonder if it is a noise floor problem. How does it act on a service
> > monitor when it is not hooked to an antenna picking up high levels of noise?
> > 
> > tom
> > 
> > 
> > > [Original Message]
> > > From: Adam Feuer 
> > > To: 
> > > Date: 7/12/2009 7:30:11 AM
> > > Subject: Re: [Repeater-Builder] Micor Bi-Level Squelch Circuit
> > >
> > > I am a very big fan of the Micor bi-level squelch.  It's action is 
> > > second to none on my 440 and 900 system however, I too am having the 
> > > exact same problem on my 29.540 receiver in carrier squelch.  I just 
> > > will not take anyone into the noise but rather near quieting signals 
> > > just "pop out" and disapear under the squelch. I have tried cleaning all 
> > > of the pins and swapping out the audio control module but nothing seems 
> > > to help. Interesting enough, this is NOT happening on my 6 meter Spectra 
> > > Tac!
> > >
> > > At the moment, I have placed my 29.540 Spectra Tac aside and replaced it 
> > > with a GE Mastr II auxiliary receiver on 10 meters.  The results are 
> > > much better as pertains to the squelch, but this is not to start a Micor 
> > > vs. Mastr II comparison.something is just not right on 10 meters 
> > > with a Spectra Tac receiver.  If it can work on all of the other bands 
> > > (especially six meters!) it should work on 10.
> > >
> > > If anyone has any suggestions, perhaps some part changes on the audio 
> > > control module, they would be greatly appreciated!
> > >
> > > Adam N2ACF
> > >
> > > kq2h wrote:
> > > > I've been impressed with the operation of the Micor bi-level squelch
> > circuit based on the M7716 IC. I use Micor Spectra-Tac receivers
> > exclusively on 440, 902, 6 Meters and 222 MHz (VHF to 222 conversion) with
> > excellent results. However, I am perplexed by 10 Meters. The Spectra-Tac
> > squelch circuit doesn't work well at all. It squelches up on fading signals
> > that aren't all that noisy and drops out for no apparant reason. It appears
> > that the squelch is set too high, but it isn't. I've tried different
> > audio/squelch modules, receiver boards and housings. Even the IMTS
> > modification which defeats the short squelch tail doesn't help the
> > situation. When a UHF reciever is substituted in place of the 10 Meter
> > receiver, the squelch circuit works fine. 
> > > >
> > > > An old 25-30 MHz Motrac receiver,  with its simple 3 transistor squelch
> > circuit, works perfectly on 10 Meters. There are no problems with drop
> > outs. The receiver squelch remains open well into the noise. This leads me
> > to believe that the Micor bi-level circuit needs to be optimized for 10
> > Meters.
> > > >
> > > > Does anyone know of any component value changes in the Micor bi-level
> > circuit to optimize operation on 10 Meters? 
> > > >
> > > >
> > > >
> > > > 
> > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > > >   
> > >
> > >
> > >
> > > ---

[Repeater-Builder] Repeater related items for sale

[kk2ed]

I have a few repeater related items FS:

ARR (Advanced Receiver Research) SP220VDG 220MHz GaAs Fet switchable
preamp. In like new condition with paperwork. One minor scratch on the
rear, otherwise appears new. Mounting screw holes and pwr connections
look like they were never used. Tested on my tracking generator, and
working to specs. $85 shipped USPS.

Computer Automation Technology (CAT) CAT-200B repeater controller. In as-new 
condition. Includes manual and connectors. I bought this new for a repeater 
project, and wound up using another controller instead.
$160 shipped USPS, $165 shipped ground.

Arcom RC-210 repeater controllers, in rack mount case, and newer style audio 
delay board. Brand new, never used. Not a scratch on them. Includes RCP 
programming software. I bought a bunch of these for a major project, and have a 
few left. There are actually better than as-new, as I added the 4-40 threaded 
hardware to the DB9s (which Arcom doesn't supply), and the DTMF LEDs were 
replaced with 3 amber LEDS instead of the red, green, and yellow ones like 
those used for the COS, PL, and PTT inicators. The amber LEDs are the exact 
same manufacturer and series as the green, red, and yellow ones, sourced from 
Arcom's supplier.  $415 shipped ground.

MSR2000 VHF 100w repeater. C73GSB station, currently on 150Mhz range. Will tune 
to ham band with no trouble. $300 as is, or $450 turn key on your frequency and 
PL, wired for a repeater controller of your choice. Or I and work a package 
deal with one of the above controllers. These stations make excellent 
repeaters, better than anything you can buy new. I have sold a number of these 
turn-key to hams, and can provide references.  Shipping extra.

Motorola Micor 375W repeater. Currently on 147.3xx. Has Spectra-Tac receiver 
chassis, and non-unified exciter chassis (12w intermediate PA driving the big 
8560 tube PA).  Tubes are making full power. $500, pick-up only in central NJ.  
Will also include a complete spare station, minus tubes, for free if you can 
fit it in your truck.

Scom 5K repeater controller. Version 2.0, and Scom DADM audio delay board, in 
factory LED rack mount case. In excellent condition, with original manual 
(looks untouched). No mods, as original. $200 shipped with DADM. $150 shipped 
without DADM module.

NHRC DAD digital audio delay module. As new condition. $70 shipped.

Bird CC-1 meter leather carrying cases for model 43 or 4304A. These are the 
original Bird cases which are no longer manufactured. In good condition. A few 
overall scuffs from use, but otherwise in fine shape. $60 each shipped. 

Bird 43 wattmeters. Older style with leather strap handle and metal name/sn 
plate on top. Cases have normal dings or scratches from years of use, but not 
abused. Meter movements in perfect shape. N female QC connectors. $160 each 
shipped.

Bird 43 wattmeter. Newer stle plastic strap handle and sticker-type model and 
sn lable. In excellent conditon (one or two small marks on case. N female QC 
connectors. $235 shipped.  

All items fully tested and guaranteed as stated. 

Eric
KE2D
609-713-3742

[Repeater-Builder] Re: 220MHz items FS - preamp, crystals

[kk2ed]

Thanks for the pointer, Nate.

I price- hecked the ARR website last evening before posting this FS 
message.  I just went back and realized what had happened - I was 
looking at their commercial page, which lists all of the switched 
preamps at $150, rather than the amateur page which reflects $120, so 
that is what I based the price on. 

Based on that, a price correction is in order.  I'll let it go for 
$100 shipped.  

Some folks like the switched version, as they believe any stray RF 
getting back into the rx line might switch it out before damage to 
the fet occurs.   On the other hand, some like the ability to wire 
the switching circuit to a logic output on a controller, thereby 
allowing remote enabling/disabling of the preamp.


Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Nate Duehr"  
wrote:
>
> Eric, 
> 
> Not trying to ruin your day, but...
> 
> http://www.advancedreceiver.com/page7.html
> 
> ...shows the SP220VDG pre-amp at $119.95 brand-new.  Not trying to 
be a
> "cheap ham", just sayin'.
> 
> For most duplexed repeater setups, the P220VDG on this page: 
> 
> http://www.advancedreceiver.com/page5.html
> 
> For $79.95 new, would fit the bill...
> 
> The SP220VDG is RF-sensing switched, and can only handle 25W of 
thru-power
> for those wondering.  The P220VDG is receive-only.
> 
> Nate
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of kk2ed
> Sent: Tuesday, February 10, 2009 7:08 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] 220MHz items FS - preamp, crystals
> 
> I have a few 220MHz related items FS:
> 
> ARR (Advanced Receiver Research) SP220VDG 220MHz GaAs Fet 
switchable 
> preamp.  In like new condition with paperwork. One minor scratch on 
the 
> rear, otherwise appears new. Mounting screw holes and pwr 
connections 
> look like they were never used.  Tested on my tracking generator, 
and 
> working to specs.  Sells for $150+sh new.  $120 shipped USPS.
>

[Repeater-Builder] 220MHz items FS - preamp, crystals

[kk2ed]

I have a few 220MHz related items FS:

ARR (Advanced Receiver Research) SP220VDG 220MHz GaAs Fet switchable 
preamp.  In like new condition with paperwork. One minor scratch on the 
rear, otherwise appears new. Mounting screw holes and pwr connections 
look like they were never used.  Tested on my tracking generator, and 
working to specs.  Sells for $150+sh new.  $120 shipped USPS.


Two crystal pairs for a Spectrum SCR series 220 repeater:
One set on TX223.660, RX222.060
One set on TX223.840, RX222.240

$15 shipped per pair, or $25 for both pairs shipped.

Eric
KE2D
609-713-3742

[Repeater-Builder] Re: ACC RC96 rx audio gating

[kk2ed]

I did a little further digging with the RC96, and discovered the 
following...

The SELECT 1 line which controls the CD4053 (U9)RX audio gate control 
pin behaves as follows:

When the controller is in carrier access modes (COP07, 08, or 09), 
the pin never changes state with or without a COS and/or PL signal 
present. It is always low, allowing audio to pass.

When the controller is in PL access mode (COP10), the SELECT 1 line 
becomes high when no signal is present, thus blocking rx audio from 
passing. When only an active COS signal is presented, it remains 
high.  When only an active PL signal is applied, it still remains 
high, and no audio passes.  However, when both COS and PL active 
signals are applied, the SELECT 1 line becomes low, and audio is 
allowed to pass. The line remains low even when COS then dissappears, 
and stays low until the PL signal ceases. Basicly, both COS and PL 
are needed to open the audio gate, but only PL is needed to keep it 
open.  

Fortunately, there is an easy fix.  

I simply bent up pin 9 of the 4053 IC (U9) so that the pin is removed 
from the socket. Conveniently, there is also a board solder/feedthru 
connection for pin 9 (SELECT 1) just to the right of the IC socket. I 
simply soldered in a 1N4 series diode, anode connecting to the 
aforementioned thru-board hole tied to pin 9, and the cathode to pin 
9 of the 4053 IC itself.  Next, I installed the cathode of a second 
diode to pin 9 as well.  The anode of this second diode connects to 
the COS signal coming out of the ULN2804 input buffer IC (U5) at pin 
18 (this is also the same signal appearing on pin 3 of the optional 
ADM connector location). 

The two diodes are simply used to fully isolate the SELECT 1 and COS 
signals from each other.

Now, when the controller is in any of the three COS modes, the SELECT 
1 signal has no effect, but the newly connected COS signal switches 
the 4053 audio gate to track with COS.  

When the controller is in PL mode, the SELECT 1 signal controls the 
audio gate so that audio only passes when both COS and PL are 
present.  Since this mode is already working properly via the SELECT 
1 signal to track COS (along with PL), the newly installed COS signal 
is simply "paralled" with the original SELECT 1 signal, and 
effectively has no bearing on the control at that point.


Now, the controller will effectively mute rx audio properly no matter 
which receiver mode is selected (COS or PL). I successfully tested 
the RC96 on a Micor receiver feeding approx. 1Vpp into the controller 
with absolutely no blowby whatsoever.  Full muting. 


This mod will work on the RC85 as well.  With the simple installation 
of two $0.05 didoes, the ACC controllers will now accept unmuted rx 
audio without a problem.  

Eric
KE2D







--- In Repeater-Builder@yahoogroups.com, "Jeff DePolo"  
wrote:
>
> > Has anyone ever figured out why the RC96 does NOT mute RX audio 
when
> > the receiver is inactive? 
> > 
> > Looking at the schematic it appears that the rx audio mux switch 
pin 
> > of IC9 (4053) should, in theory (according to the schematic), 
control 
> > the audio gating. The switch control pin is tied to the "select 
1" 
> > line, which is driven by the cpu (indirectly).
> 
> If I remember right, both the RC85 and RC96 behave this way.  As 
you said,
> it is likely that they never implemented the control in software.  
The
> RC85/96, unlike many other controllers, let hardware logic do a lot 
of the
> grunt work to un-burden the processor, as is evidenced by the way 
it does
> audio gating.  I did a modification at the delay board, possibily 
similar to
> what you did but I don't remember exactly, to properly mute when 
feeding it
> unsquelched audio.  
> 
>   --- Jeff WN3A
>

[Repeater-Builder] ACC RC96 rx audio gating

[kk2ed]

Has anyone ever figured out why the RC96 does NOT mute RX audio when
the receiver is inactive? 

Looking at the schematic it appears that the rx audio mux switch pin 
of IC9 (4053) should, in theory (according to the schematic), control 
the audio gating. The switch control pin is tied to the "select 1" 
line, which is driven by the cpu (indirectly).

However, when monitoring the switch pin of the 4053 for the rx audio
path, the pin's logic state never changes. 

I have an application where I want to use unsquelched audio into the 
RC96. When using a 96 with the audio delay option board, as can be 
seen by reviewing the schematics, ACC uses a 4077 NOR gate to combine 
the SELECT 1 line with the rx COS signal to allow either function to 
control this audio gate, which by virtue of the delay board 
installation process gets moved up onto the daughterboard.

For now I simply lifted the 4053's switch control pin from the ic
socket and wired it to the rx COS pin by way of a transistor and pull-
up resistor to Vcc of the chip, and this works great. However, as a
purist, this has one caveat, in that if the repeater is in PL mode,
any noise bursts which open the squelch (and result in COS going
active) will allow rx audio to pass thru to the TX during hang time
or IDs.

Does anyone know why the processor is NOT controlling the rx audio
gate? It would be nice if it did, so that the audio would only switch
on when the rx is active, regardless of mode.

Did ACC just never get around to implementing control of the SELECT 1
logic line in the firmware?

I have confirmed this in more than one 96, so it's not a bad
component.

Eric
KE2D

[Repeater-Builder] Re: Kendercom included an internal ACC Controller?

[kk2ed]

Skip,

The Mark 4 did NOT use an ACC controller. It was Kendecom's own 
design. Their internal controller consists of multiple boards, but 
the combination of them provides functionality similar to an ACC 
RC850 and DVR combo, all in one package internal to the repeater.  
One is a DVR board loaded with RAM, another is known as the Message 
Master, which is similar to the ACC VRT board, and the main one is 
the cpu board. There is also another board with audio related 
components, such as the SD4096 (or something close) audio delay 
chip,, and some sort of audio processing. Finally, there is an 
interconnect board that provides the many RCA and terminal strip 
points on the rear panel.

The programming is limited, and nowhere near as complete as the 
RC850, but it does allow for TI synthesis voice, CW, and DVR 
messages, IDs, and CTs.

Eric 
KE2D




--- In Repeater-Builder@yahoogroups.com, "skipp025"  
wrote:
>
> Looking at the following Ebay auction:  
> 
> Kendercom Mark 4 CR VHF Repeater Voice Controller & DVR 
> Ebay Item number: 330296552120
> 
> I'm lead to believe this Kendercom was originally equipped with 
> an ACC Controller (from the factory) or was the controller 
> added by the owner after the purchase of the repeater? 
> 
> Any current or former Kendercom Owners out there able to tell 
> the story?  Thanks in advance for your replies. 
> 
> cheers, 
> s.
>

[Repeater-Builder] Re: test equipment theft

[kk2ed]

Saw that one right away last night - but it is not mine, from what I 
see in the photos. That one has the P25 option modules on the rear, 
plus newer firware as shown in the pics. 

Thanks for the lead though.

Eric
KE2D
--- In Repeater-Builder@yahoogroups.com, "Mike Dietrich" 
<[EMAIL PROTECTED]> wrote:
>
> There is a Mot 2670 monitor for sale on flea bay right now in 
central NJ but can't read s/n in listing.
> The item number is 230313035399.
> Mike
> 
---
>   
>   ----- Original Message - 
>   From: kk2ed 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Monday, December 08, 2008 10:35 PM
>   Subject: [Repeater-Builder] test equipment theft
> 
> 
>   To all list members -
> 
>   Please keep a close eye out for the following items which were 
stolen 
>   from my work vehicle this past Wednesday evening 12/3/08 in 
central 
>   NJ:
> 
>   Motorola R2670A service monitor, SN496KWN0084
>   Bird 43 wattmeter in case with 5 900MHz range slugs
>   Bird 43 wattmeter # 2 in case with 5 VHF & UHF range slugs
>   Dell laptop computer with Sprint wireless card, USB drives, etc, 
all 
>   inside a Targus leather laptop case
>   Old (otherwise worthless) Epson 386 laptop loaded with RSS 
software, 
>   and a Motorola RIB with cables, all inside a Targus canvas laptop 
case
>   DeWalt cordless drill
>   Craftsman 3/8 power drill
>   Craftsman 200pc socket set
>   Misc bit and driver sets
>   And a few other 
>   Sony DSC-S750 digital camera in Sony soft case
>   Magellan Roadmate 1412 GPS receiver with bracket/cord
>   Plus a few other items.
> 
>   A $500 reward is being offered for any information which leads to 
an 
>   arrest of the responsible perpetrator(s). There were a few 
witnesses 
>   to the crime, but they didn't think anything of it at the time. 
>   Amazing! What a hell of a way to start the Christmas holiday! 
> 
>   Thanks for your attention.
> 
>   73
>   Eric
>   KE2D
>   609-713-3742
>

[Repeater-Builder] test equipment theft

[kk2ed]

To all list members –

Please keep a close eye out for the following items which were stolen 
from my work vehicle this past Wednesday evening 12/3/08 in central 
NJ:

Motorola R2670A service monitor, SN496KWN0084
Bird 43 wattmeter in case with 5 900MHz range slugs
Bird 43 wattmeter # 2 in case with 5 VHF & UHF range slugs
Dell laptop computer with Sprint wireless card, USB drives, etc, all 
inside a Targus leather laptop case
Old (otherwise worthless) Epson 386 laptop loaded with RSS software, 
and a Motorola RIB with cables, all inside a Targus canvas laptop case
DeWalt cordless drill
Craftsman 3/8 power drill
Craftsman 200pc socket set
Misc bit and driver sets
And a few other 
Sony DSC-S750 digital camera in Sony soft case
Magellan Roadmate 1412 GPS receiver with bracket/cord
Plus a few other items…

A $500 reward is being offered for any information which leads to an 
arrest of the responsible perpetrator(s). There were a few witnesses 
to the crime, but they didn't think anything of it at the time. 
Amazing! What a hell of a way to start the Christmas holiday!   

Thanks for your attention.

73
Eric
KE2D
609-713-3742

[Repeater-Builder] Re: Maratrac VHF low range question

[kk2ed]

I've got 5 36-42 range 2 Maratracs.  Three work fine, one is missing 
the logic board, and one had a coil cut off of it (they were to be 
made inoperable before disposal, but I got lucky and 3 made it out 
alive!).

Anyone have a need for them?  Cheap or will trade for something I 
might be able to use.  Wouldn't mind having two 29.7-36 range units 
to use on 10m FM.  I had these sitting around for such a project, but 
finally looked closer at them (never bothered when I found them) and 
found that the were range 2 units. Oh well


Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Gary" <[EMAIL PROTECTED]> wrote:
>
> Pushing the range 2 boards would require a bunch of parts changes. 
You'd pretty much have to convert
> the RF and PA boards to range 1. New boards are still available but 
at enormous cost so I'd suggest
> patiently looking around for a radio with the right boards in it. 
Please don't trash the other one,
> instead either sell it or give it away. 
> Gary
> N6LRV
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
[EMAIL PROTECTED] On Behalf Of kk2ed
> Sent: Saturday, November 08, 2008 11:48 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Maratrac VHF low range question
> 
> Has anyone ever successfully taken a range 2 (36-42) Maratrac and 
> brought it down to 29.6MHz?   Or should I just throw these things 
into 
> the trash?
> 
> Eric
> KE2D
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
>

[Repeater-Builder] Maratrac VHF low range question

[kk2ed]

Has anyone ever successfully taken a range 2 (36-42) Maratrac and 
brought it down to 29.6MHz?   Or should I just throw these things into 
the trash?

Eric
KE2D

[Repeater-Builder] Re: OT: HT1250LS question

[kk2ed]

Thanks for the links.

Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Mark" <[EMAIL PROTECTED]> wrote:
>
> Eric,
> 
> Mark here.  This is what I found out about the LS series for your
> reading pleasure.  Hope it helps.
> Mark KB6SRT-  Oh  and I will be in  touch for the radio project we
> discussed.  I am scraping some cash  together for shipping now. 
> Thanks.  The 3rd link gives accessories available to this "NO LONGER
> MANUFACTURED" radio.
> 
> 
> http://www.motorola.com/content.jsp?globalObjectId=5473
> 
> http://www.motorola.com/governmentandenterprise/il/en-
us/public/functions/browseproduct/productdetailpage.aspx?
navigationpath=id_803i/id_1388i/id_1174i/id_2227i/id_1769i
> 
> http://www.motorola.com/governmentandenterprise/il/en-
us/public/functions/browseproduct/relateddocuments.aspx?
navigationpath=id_803i/id_1388i/id_1174i/id_2227i/id_1769i&doctype=id_
140i
> 
> 
> _
> > > 
> > > -Original Message-
> > > From: Repeater-Builder@ <mailto:Repeater-Builder%
40yahoogroups.com>
> > yahoogroups.com
> > > [mailto:Repeater-Builder@ <mailto:Repeater-Builder%
40yahoogroups.com>
> > yahoogroups.com] On Behalf Of kk2ed
> > > Sent: Wednesday, November 05, 2008 11:34 AM
> > > To: Repeater-Builder@ <mailto:Repeater-Builder%
40yahoogroups.com>
> > yahoogroups.com
> > > Subject: [Repeater-Builder] OT: HT1250LS question
> > > 
> > > Sorry for being off topic, but I was hoping someone here was 
> > familiar 
> > > enought with the Motorola HT1250 series to answer a question or 
> > two -
> > > 
> > > 1. Can I use an HT1250LS as a conventional radio? If I use it 
> > strictly 
> > > as a conventional radio, can I get more than the 16 channels I 
see 
> > > mentioned in the literature?
> > > 
> > > 2. If not, can it be re-flashed as a standard HT1250 for 128 
> > channels?
> > > 
> > > 3. What is a clean HT1250LS UHF 403-470 full keypad with 
charger 
> > worth?
> > > 
> > > I'm looking for a UHF HT1250 full keypad, but found what 
appears to 
> > be 
> > > a good deal on an HT1250LS, and wanted to know the pros/cons 
before 
> > I 
> > > buy it. I had a regular HT1250 a few years ago but sold it, and 
now 
> > > wish I kept it!
> > > 
> > > Thanks
> > > Eric
> > > KE2D
> > >
> >
>

[Repeater-Builder] NHRC-DAD for sale

[kk2ed]

I have an as-new NHRC-DAD audio delay board for sale.

$75 shipped USPS.

Eric
KE2D
609-713-3742

[Repeater-Builder] NHRC-DAD for sale

[kk2ed]

I have an as-new NHRC-DAD audio delay board for sale.

$75 shipped USPS.

Eric
KE2D
609-713-3742

[Repeater-Builder] Re: OT: HT1250LS question

[kk2ed]

Thanks, Eric.

I guess I'll keep looking for a conventional 1250.  I've noticed what 
you're saying about some of the ones on eBay lately.  One of the ones 
I was watching, the buyer/winner never followed thru, and I'm 
guessing this might have been the reason.  Probably why they're (LS) 
also going for $200 or so. 

Also, thanks to the other gentleman for suggesting the HT1550 and FP 
battery.   I haven't seen any 1550s for sale lately, but I'll watch 
for one.


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Eric,
> 
> I must make some assumptions, since you did not reveal the model 
number.
> HT1250 is a family name, not a model number like AAH25KDF9DU5AN.  
Without
> knowledge of the model number, it is difficult if not impossible to 
answer
> your questions.
> 
> The HT1250LS radios- depending upon the model number- are generally 
designed
> for trunking service, and have limited conventional capability.  
No, you
> cannot "flash" a trunking radio to have additional conventional 
channels,
> because both the firmware and the CPU masking have been designed 
for one
> purpose and cannot be changed.  Some shady sellers on eBay are 
hawking
> HT1250LS radios as HT1250 (using new stick-on labels) and bilking 
unwary
> buyers.  Perhaps the best course of action is to ignore any seller 
who will
> not reveal the complete model and serial number of a radio he or 
she is
> offering.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed
> Sent: Wednesday, November 05, 2008 11:34 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] OT: HT1250LS question
> 
> Sorry for being off topic, but I was hoping someone here was 
familiar 
> enought with the Motorola HT1250 series to answer a question or 
two -
> 
> 1. Can I use an HT1250LS as a conventional radio? If I use it 
strictly 
> as a conventional radio, can I get more than the 16 channels I see 
> mentioned in the literature?
> 
> 2. If not, can it be re-flashed as a standard HT1250 for 128 
channels?
> 
> 3. What is a clean HT1250LS UHF 403-470 full keypad with charger 
worth?
> 
> I'm looking for a UHF HT1250 full keypad, but found what appears to 
be 
> a good deal on an HT1250LS, and wanted to know the pros/cons before 
I 
> buy it. I had a regular HT1250 a few years ago but sold it, and now 
> wish I kept it!
> 
> Thanks
> Eric
> KE2D
>

[Repeater-Builder] OT: HT1250LS question

[kk2ed]

Sorry for being off topic, but I was hoping someone here was familiar 
enought with the Motorola HT1250 series to answer a question or two -

1. Can I use an HT1250LS as a conventional radio? If I use it strictly 
as a conventional radio, can I get more than the 16 channels I see 
mentioned in the literature?

2. If not, can it be re-flashed as a standard HT1250 for 128 channels?

3. What is a clean HT1250LS UHF 403-470 full keypad with charger worth?

I'm looking for a UHF HT1250 full keypad, but found what appears to be 
a good deal on an HT1250LS, and wanted to know the pros/cons before I 
buy it. I had a regular HT1250 a few years ago but sold it, and now 
wish I kept it!


Thanks
Eric
KE2D

[Repeater-Builder] wanted: KLN6709 141.3Hz 4A reeds

[kk2ed]

Wanted:

Motorola KLN6709 141.3Hz 4A reeds.  The more the better.

Need 6709s. Have plenty of the others.  Have other tones to trade also.


Eric
KE2D

[Repeater-Builder] MSR2000 VHF units for sale

[kk2ed]

I have the following repeaters for sale. 
 
Three (3) units - all identical and set up the same, as follows:
 
MSR2000 C73GSB VHF repeater. 100w int duty PA, in 29" compa-
station cabinet. Professionally wired to a brand new never used Arcom 
RC-210 repeater controller in rack mount case with newer-style 
(greatly improved S/N ratio) Arcom audio delay board. The controller 
is properly wired to the MSR's backplane via an 8-conductor shieled 
22ga cable, and the power connection is also properly made to the 
backplane.  Wire-tied to look factory-done, and enough slack left to 
remove/service the controller as needed.
 
All backplane jumpers and card jumpers set for proper operation with 
external controller. The audio and squelch card has been properly 
modified to allow the controller to fully select between COS, PL, 
COS&PL, or COS or PL, depending on how the controller is programmed 
by the user.  The card has been set so that the presence of PL detect 
will not affect the carrier squelch. Carrier squelch circuit works 
similar to the Micors - 20db quieting or better results in almost no 
tail. Noisy signals have a long tail. However, the Arcom audio delay 
board mutes the tails anyway, so they are never heard regardless. 
Great for vhf mobiles which usually flutter a lot.
 
The repeater has been fully aligned to factory specs for 0.25uv/12db 
sinad receive sensitivity and the PA makes full power in excess of 
100w. However, for amateur use, especially during long nets or linked 
systems, these PAs should be derated to 60-80w or so and fans added, 
and they will last forever. 
 
Factory encode/decode PL board present and wired properly to the 
Arcom controller for both rx DECODE (as stated above), as well as tx 
ENCODE control via the controller programming (on, off, follow cos, 
etc..) 
 
The repeater is currently set on 146.880TX/146.280RX using my test 
bench channel elements. I will re-crystal the original elements and 
tune the repeater to your desired frequency on receipt of a deposit 
(basically to cover my exposure on the crystals should you cancel).
 
I had about 17 of these, and have sold a number of them turn-key to 
various radio clubs and repeater owners in the tri-state area, FL, 
and other areas, and am more than happy to provide references of 
owners and currently operating units/systems. Photos of completed 
unit available.
 
Price is $950 turn-key, crystalled and tuned to your frequency, 
including the Arcom controller. The controller package (RC210, AD, 
case) is worth approx. $500 alone. The crystals are $50 themselves, 
elements on frequency are worth $100 or so. So how can you beat a 
real repeater for $400 before the controller and crystals, tuned and 
ready to go?
 
I will also sell the repeaters turn-key less the Arcom controller 
package for $500 each, and wire the cables for the controller of your 
choice so it is plug and play upon receipt.
 
The repeaters will have a 30-day warranty to cover proper operation 
against failure. Free phone/email tech support afterwards. Shipping 
extra. Due to weight, local pickup preferred. I think Fedex Ground or 
DHL can ship the repeater cabinet for around $100 or so. Plus another 
$15 or so to protect and ship the controller separately.
 
Pictures also available to serious buyers.  Feel free to contact me 
with any questions.
 
Eric
KE2D
609-713-3742

[Repeater-Builder] Re: Wanted: 2-port controller

[kk2ed]

I actually have four of the SCOM 7330s in service right now. Probably 
the best hardware design available of all the controllers. However, 
it is overkill for this simple project. I just need something simple 
enough for a repeater and link, providing cos/ptt switching and audio 
gating/mixing.  It will be mounted inside a GR300 housing in place of 
the Motorola controller. No need for IDs or tones. 

The Linker IIa or CAT400 looks to be the best bet.  Before I pulled 
the trigger on placing an order, I figured  I would see if anyone had 
a used one for sale.  Otherwise I will place an order in the next day 
or so.

Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Mike Mullarkey" <[EMAIL PROTECTED]> 
wrote:
>
> Hi Eric,
> 
>  
> 
> Call Bob from SComm, He has a new controller that the layout is 
some of the
> best I have seen. I would use it on any of my commercial gear any 
day.
> 
>  
> 
>  
> 
>  
> 
> Colorado Telecom, L.L.C
> 
> Mike Mullarkey K7PFJ
> 
>   _  
> 
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed
> Sent: Wednesday, September 24, 2008 4:39 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Wanted: 2-port controller
> 
>  
> 
> I have a need for a cheap 2-port controller for a commercial 
repeater 
> project. One repeater and one link port. 
> 
> Before I go order a new CAT 200, does anyone on the list have 
something 
> similar that they're looking to get rid of?
> 
> Thanks
> Eric
> KE2D
>

[Repeater-Builder] Wanted: 2-port controller

[kk2ed]

I have a need for a cheap 2-port controller for a commercial repeater 
project. One repeater and one link port.  

Before I go order a new CAT 200, does anyone on the list have something 
similar that they're looking to get rid of?


Thanks
Eric
KE2D

[Repeater-Builder] Re: Motorola MICOR Receiver enclosure questions

[kk2ed]

Thia unit is a slide-out drawer from a PURC5000 paging transmitter. 
It was used as a 72MHz link receiver to receive analog modem tones 
from a paging control point. The audio then fed the controller in the 
PURC5000 to digitally moduate the transmitter with Pocsag or other 
data.

These drawer units make great stand alone repeater receivers or link 
receivers. I've used a few as link receivers wired to ports on a 
multi-port repeater controller,  The 10-pin connector on the rear 
provides audio, cos, pl detect, and feeds the unit its +12v and 
ground connections. It is the same type of connector used to connect 
a COM port DB9/25 jack to a motherboard inside a pc.

The unit houses a Micor RF/IF board and a slightly modified Micor 
base station version audio/squelch board. The difference is that that 
resistor/capacitor network on the preamp stage is tailored for flat 
audio (to accomodate the paging modem tones).  You can simply compare 
this stage to a Micor base/repeater to make it the same. I usually 
remove the 0.0056 cap and install a 12k resistor on a repeater board -
 this gives a nice response to match the Micor exciters.  I think 
this version board has a 15k resistor and no cap, so the the low end 
response is down a few db. You can experiment to tailor the stage to 
your preference.

One other thing - since this was a 72MHz version, most likely there 
is a cap or two (or three) in the squelch circuit that has been 
optimized for a 72MHz receiver - once again simply compare the board 
to the VHF/UHF station manual, and you can easily convert it to a 
VHF/UHF version. If you neglect to change the two or three caps 
involved, the worst case is that the squelch control may need to be 
higher than normal for closure. At least that has been my experience 
when using an unmodified board from a mid-band station in a VHF or 
UHF Micor station.

Rather than messing with that connector, which by the way was fed 
with nothing more than a ribbon cable, and could cause potential 
duplex issues, simply take an 8-conductor 22ga shielded cable and 
hard-wire it into the unit's main interconnect board. Then take the 
other end and install whatever connector you need for your 
controller. And use a piece of dc power zip cord for the dc 
connections.

BTW, there is a separate manual for this receiver. It came as an 
addition to the PURC5000 Paging Station manual. It covers the main 
chassis interconnect board, the various version audio/squelch boards, 
and almost every Micor RF/IF board from 30MHz thru 900MHz.

I think I have a spare copy in my office somewhere. Anyone care to 
scan it for the RB site?  If so they can have it.

Eric
KE2D





--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> One of my 900 MHz PURC5000 manuals has several Micor receivers in 
it, including 72 MHz. There's also a section that seems to cover the 
chassis, although I don't know if it's the same one you have. It 
might be. One board has a squelch pot and an RJ45 jack on it. If 
that's mounted directly behind the front panel, then it just could be 
the same board. There's also room inside the chassis for a DPL 
decoder board and a flat audio board. I suspect these same modules 
would fit into a SpectraTAC chassis but I haven't checked the pinouts.
> 
> There's a ribbon cable from the main interface board to the rear 
panel. The schematic shows the pinout of that connector. Nothing 
magic but the flat cable does make a mess of the various signals.
> 
> I would expect you could put ANY wide-band Micor receiver into the 
unit and it would work just fine. I don't know how the unit 
interfaces with the parent station, but obviously it can be done.
> 
> I thought I had a full manual for that exact chassis. I still 
might; just haven't come across it yet.
> 
> Bob M.
> ==
> --- On Sun, 9/21/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> 
> > From: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> > Subject: [Repeater-Builder] Motorola MICOR Receiver enclosure 
questions
> > To: Repeater-Builder@yahoogroups.com
> > Date: Sunday, September 21, 2008, 1:35 PM
> > I recently picked up a 72-MHz MICOR receiver off of the big
> > auction site (won't mention the name lest someone get
> > all [EMAIL PROTECTED]&!).. This MICOR receiver appears to be in a
> > 3-1/2" high MSF-5000 series box, with the spring-loaded
> > releases on the black front panel. It has a squelch control
> > and an RJ-series jack on the front panel, and the rear panel
> > has a BNC antenna jack, along with a 10-pin male plug. The
> > Motorola P/N stamped on the rear is TRC1072AB, which might
> > be just something like the rear panel number and not the
> > complete assembly number.
> > 
> > Does anyone know what series station this receiver was used
> > in? I'd like to find the hookup info for it, and find a
> > part number the 10-pin matching connector. I have plenty of
> > actual MICOR receiver info, for receivers of all bands, and
> > would like to use

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Which book might that be?



--- In Repeater-Builder@yahoogroups.com, "sgreact47" <[EMAIL PROTECTED]> 
wrote:
>
> I looked in my book and find several caps that will replace the 
17,500
> uF at 20 volts.
> 
> Cornell Dubilier 380LX  22,000 at 35 volts
>  381LX  22,000 at 35 volts
>  DCMC   33,000 at 25 volts 
> 
> United Chem-Con  KMH  33,000 at 35 volts   (my favorite)
> 
> XiconLS223MIV3545   22,000 at 35 volts   
> 
> 
> "Eric Lemmon"  wrote:
> >
> > Eric,
> > I did some research on those capacitors, and found that the 
original
> > part number 2383093G20 is NLA.  However, I noticed that part 
number 
> > 2383093G27 is still available, and is described as "CAP ALU 17500
> -10 > +150 20V".
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Eric,

Thanks for checking.  At that price it would get real expensive real 
quick (8 needed)! 

I guess I am going to be doing some retrofitting (see my post a 
moment earlier).



--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Eric,
> 
> I did some research on those capacitors, and found that the 
original part
> number 2383093G20 is NLA.  However, I noticed that part number 
2383093G27 is
> still available, and is described as "CAP ALU 17500 -10 +150 20V".  
It is
> priced on MOL at $ 36.59 each.  I wonder if it is a suitable 
substitute?
> Curiously, I looked at my TPN1106A power supply, and found that it 
has four
> 2383093G21 capacitors labeled 20,000 uF 100 V, even though the 
parts list
> for that unit lists the 17,500 uF capacitor 2383093G20.  The 
2383093G21,
> 20,000 uF capacitors are available from Motorola at $ 50.43 apiece.
> 
> When I looked up the 1-80739B57 diodes, I found them to be NLA, but 
the
> description is "BD EYLTD".  That doesn't make much sense, unless 
the diodes
> were offered only as an assembly.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed
> Sent: Thursday, September 18, 2008 9:49 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID
> 
> Thanks for the reply/suggestion. A stud mount of greater current 
> rating may be the way to go. I could just drill out of the existing 
> mounting holes and use the stud mount and a nut/washer combo. 
> 
> However, after googling till my eyes fell asleep, I found a few 
> sources on the web for the original diode - which turns out to be a 
> 1N3492R. So that takes care of the diodes - 
> 
> Now, on to the caps. I mistyped last evening, as they are 17500uf 
> and not 27000uf. Not as much luck, but I did find one supplier 
> listing NOS Moto numbered caps on their web site. I requested 
> pricing. Depending on the price, I will either buy them or retrofit 
a 
> newer style cap. 
> 
> Eric
> KE2D
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

I think you're probably right.  I found a source for the OEM caps at 
$9 each, but may I'm better off just fabricating some sort of 
mounting mechanism and using newer style caps.

Rather than using 2 17500uf either side of the chokes and four after 
the last choke, could I just use one 40,000uf or so either side, and 
two 40,000 after the last choke?   Unless I'm forgetting something, 
more capacitance can't hurt, no?


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> The problem with buying NOS caps is that they might have been new 
in 1980. They've been sitting on the shelf for all this time, and 
might not be much better than what you have now (unless yours are 
shorted).
> 
> Bob M.
> ==
> --- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > From: kk2ed <[EMAIL PROTECTED]>
> > Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts 
ID
> > To: Repeater-Builder@yahoogroups.com
> > Date: Friday, September 19, 2008, 12:48 AM
> > Thanks for the reply/suggestion. A stud mount of greater
> > current 
> > rating may be the way to go. I could just drill out of the
> > existing 
> > mounting holes and use the stud mount and a nut/washer
> > combo. 
> > 
> > However, after googling till my eyes fell asleep, I found a
> > few 
> > sources on the web for the original diode - which turns out
> > to be a 
> > 1N3492R. So that takes care of the diodes - 
> > 
> > Now, on to the caps.  I mistyped last evening, as they are
> > 17500uf 
> > and not 27000uf.  Not as much luck, but I did find one
> > supplier 
> > listing NOS Moto numbered caps on their web site. I
> > requested 
> > pricing. Depending on the price, I will either buy them or
> > retrofit a 
> > newer style cap.  
> > 
> > Eric
> > KE2D
> > 
> > 
> > 
> > --- In Repeater-Builder@yahoogroups.com, Captainlance 
> >  wrote:
> > >
> > > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE
> > "REVERSE" 
> > POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I
> > HAVE USED 
> > THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE
> > CURRENT 
> > THAN THE FACTORY ONES DO.
> > > LANCE N2HBA
> > >   - Original Message - 
> > >   From: kk2ed 
> > >   To: Repeater-Builder@yahoogroups.com 
> > >   Sent: Thursday, September 18, 2008 9:10 AM
> > >   Subject: [Repeater-Builder] Re: Micor TPN1110A power
> > supply parts 
> > ID
> > > 
> > > 
> > >   The diodes CR1 and CR2 are compression-fitted style
> > rectifier 
> > diodes 
> > >   that are pressed into a rectangle stock of aluminum,
> > and the 
> > aluminum 
> > >   is then secured to the chassis via two screws. The
> > diodes have 
> > one 
> > >   solder lug terminal. 
> > > 
> > >   The service manual only lists the Motorola part #;
> > no specs or 
> > >   industry-standard part # is given. Same on the caps.
> > Only spec 
> > given 
> > >   is 27,000 uf @ 20wvdc. 
> > > 
> > >   I did a quick search of Mouser and DigiKey, and was
> > unable to 
> > find 
> > >   any chassis-mount style caps. Anyone find something
> > suitable that 
> > can 
> > >   be re-secured to the ps's chassis via new rivets
> > or screws? I 
> > know I 
> > >   can just solder in any cap that meets electrical
> > specs, but I 
> > would 
> > >   like the caps to be secure and not have the ps
> > become a fire 
> > hazard 
> > >   waiting to happen!
> > > 
> > >   The power supply was still sitting in my truck last
> > night. When I 
> > get 
> > >   a break today I will take it apart further and see
> > if I can find 
> > a 
> > >   part # stamped on the diodes and caps that might
> > indicate what 
> > the 
> > >   real part # is. While I was at the repeater site
> > yesterday I 
> > thought 
> > >   I saw a 1N stamped on the diodes. 
> > > 
> > >   I would have thought that there would have been
> > someone here on 
> > the 
> > >   list that has repaired one of these supplies before,
> > so that is 
> > why I 
> > >   asked. 
> > > 
> > >   Eric
> > >   KE2D
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Thanks for the reply/suggestion. A stud mount of greater current 
rating may be the way to go. I could just drill out of the existing 
mounting holes and use the stud mount and a nut/washer combo. 

However, after googling till my eyes fell asleep, I found a few 
sources on the web for the original diode - which turns out to be a 
1N3492R. So that takes care of the diodes - 

Now, on to the caps.  I mistyped last evening, as they are 17500uf 
and not 27000uf.  Not as much luck, but I did find one supplier 
listing NOS Moto numbered caps on their web site. I requested 
pricing. Depending on the price, I will either buy them or retrofit a 
newer style cap.  

Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, Captainlance 
<[EMAIL PROTECTED]> wrote:
>
> THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE "REVERSE" 
POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I HAVE USED 
THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE CURRENT 
THAN THE FACTORY ONES DO.
> LANCE N2HBA
>   - Original Message - 
>   From: kk2ed 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Thursday, September 18, 2008 9:10 AM
>   Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts 
ID
> 
> 
>   The diodes CR1 and CR2 are compression-fitted style rectifier 
diodes 
>   that are pressed into a rectangle stock of aluminum, and the 
aluminum 
>   is then secured to the chassis via two screws. The diodes have 
one 
>   solder lug terminal. 
> 
>   The service manual only lists the Motorola part #; no specs or 
>   industry-standard part # is given. Same on the caps. Only spec 
given 
>   is 27,000 uf @ 20wvdc. 
> 
>   I did a quick search of Mouser and DigiKey, and was unable to 
find 
>   any chassis-mount style caps. Anyone find something suitable that 
can 
>   be re-secured to the ps's chassis via new rivets or screws? I 
know I 
>   can just solder in any cap that meets electrical specs, but I 
would 
>   like the caps to be secure and not have the ps become a fire 
hazard 
>   waiting to happen!
> 
>   The power supply was still sitting in my truck last night. When I 
get 
>   a break today I will take it apart further and see if I can find 
a 
>   part # stamped on the diodes and caps that might indicate what 
the 
>   real part # is. While I was at the repeater site yesterday I 
thought 
>   I saw a 1N stamped on the diodes. 
> 
>   I would have thought that there would have been someone here on 
the 
>   list that has repaired one of these supplies before, so that is 
why I 
>   asked. 
> 
>   Eric
>   KE2D
> 
> 
> 
>
> 
> 
> 
--
> 
> 
> 
>   No virus found in this incoming message.
>   Checked by AVG - http://www.avg.com 
>   Version: 8.0.169 / Virus Database: 270.6.21/1678 - Release Date: 
9/18/2008 9:01 AM
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Thanks for the reply, Bob.

It sounds like the 50a bridge rectifier may be my best bet.  Same 
with the newer style caps.

I'm admittedly somewhat of a perfectionist and neat freak, and my 
motto has always been "use oem parts for proper repair", but this 
appears to be one of those cases of "do you want it fixed or not?", 
and I guess an ugly working TPN1110A is better than a junk TPN1110A!

I will hit eBay and pick up a few of the bridge rectifiers. A screw, 
nut, and some thermal grease and that part should be good to go.  The 
caps, well some heat shrink and wire ties should fit the bill.  

I have a second TPN1110A that works but has horrible voltage sag and 
ac hum under load. So I guess I will be rebuilding two of them at 
once.

Maybe a few pictures and RB article are in order when I'm done.


Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> Other diode alternatives: consider replacing the two diodes with a 
bridge rectifier. You can get a 50A 1000V unit (I've used these in 
Astron RS35 supplies) on eBay for about $5 - KBPC5010. One single #8 
machine screw holds it to the chassis, and 1/4 inch quick-disconnect 
terminals let you connect it to just about anything. There are also 
60A and 70A versions on eBay. You'll need to add your own ground wire 
to the negative terminal, but it's probably easier to deal with in 
the long run.
> 
> Stud diodes come in both anode-to-case and cathode-to-case, but 
they're each about the same price as the bridge rectifier, and you 
need two, plus some means of mounting them (bracket etc).
> 
> I guess you have to decide if it's worth replacing just the press-
fit diodes to maintain the original Motorola configuration, or 
finding a current component that will do the job and be readily 
available if it ever fails again.
> 
> Bob M.
> ==
> --- On Thu, 9/18/08, Bob M. <[EMAIL PROTECTED]> wrote:
> 
> > From: Bob M. <[EMAIL PROTECTED]>
> > Subject: Re: [Repeater-Builder] Re: Micor TPN1110A power supply 
parts ID
> > To: Repeater-Builder@yahoogroups.com
> > Date: Thursday, September 18, 2008, 1:02 PM
> > Those big aluminum electrolytic caps with screw terminals
> > are getting extinct, and if you DO find one, it'll
> > likely be expensive. You can get something quite smaller in
> > size but the same or larger electrical value. Go with that.
> > Stuff some stiff foam rubber or even some wood slats around
> > the bottom so it will fit into the original clamp.
> > That's what a lot of the hi-fi repair guys are doing
> > now. A lot cheaper for something that has much better specs.
> > 
> > The diodes are probably very similar to what an automobile
> > alternator uses. Of course, finding the exact replacements
> > could still be difficult. They're probably (minimally)
> > 50V, 50A, but I'd look for something a bit bigger. The
> > supply is good for 25A at 14V nominal. According to the
> > schematic, the anodes (the ends with the arrows) are
> > connected to the case and ground. Push-in diodes came both
> > ways, mainly because many alternators use three of each
> > inside, and they can only ground the case of three of them.
> > 
> > You could also replace the diodes and bracket with a piece
> > of aluminum heatsink material and use stud-mount diodes.
> > Again, observe polarity otherwise you'll have to
> > insulate the cases or the heatsink (probably not a good idea
> > to have that sitting at +15V).
> > 
> > Bob M.
> > ==
> > --- On Thu, 9/18/08, kk2ed <[EMAIL PROTECTED]> wrote:
> > 
> > > From: kk2ed <[EMAIL PROTECTED]>
> > > Subject: [Repeater-Builder] Re: Micor TPN1110A power
> > supply parts ID
> > > To: Repeater-Builder@yahoogroups.com
> > > Date: Thursday, September 18, 2008, 10:10 AM
> > > The diodes CR1 and CR2 are compression-fitted style
> > > rectifier diodes 
> > > that are pressed into a rectangle stock of aluminum,
> > and
> > > the aluminum 
> > > is then secured to the chassis via two screws.  The
> > diodes
> > > have one 
> > > solder lug terminal.  
> > > 
> > > The service manual only lists the Motorola part #; no
> > specs
> > > or 
> > > industry-standard part # is given. Same on the caps.
> > Only
> > > spec given 
> > > is 27,000 uf @ 20wvdc.  
> > > 
> > > I did a quick search of Mouser and DigiKey, and was
> > unable
> > > to find 
> > > any chassis-mount style caps. Anyone find something
> > > suitable that can 
> >

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Don,

What did you do to supply the +9.6vDC that the backplane requires? I 
understand that I can use an Astron RM-60M to feed the high current 
PA connection as well as the regulated 13.8vdc to the backplane and 
tripler, but how did you derive the +9.6v regulated supply? 

Did you build a circuit for it?

Has anyone used a simple 9v or 10v regulator circuit derived around a 
780x type device?

Before I go reading, anyone know what the current requirements are on 
the Micor station for the +9.6v stages?

Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "ka9qjg" <[EMAIL PROTECTED]> wrote:
>
>  
> _ I really Like all My Motorola equipment, I have the Micor unified
> chassis in a 6 Ft Motorola Rack with everything Else need for the
> 444.750 repeater, I started having Problems with the Micor Power 
Supply
> and I would set in a Chair remove the Screws from the rack and lift 
and
> pull out the Supply to put it on the Test bench.
>  
> I never did weigh  it,  But I have a few cuts on My legs and hands 
that
> tells Me it is to heavy to keep removing from the rack , I did have 
a
> hard time finding  some of the Big resistors and a few other 
things .
> Off course You can get one Cheaper on that auction place, But 
shipping
> will be High and you will not be sure if it works. 
>  
> It is a Great dependable Continues Duty power supply and I wanted to
> keep Everything Motorola.
>  
> But I got tired of taking it in and out and looking for Parts , I 
just
> ordered  a 60 Amp rack mount Astron with the Built in Battery Back 
up ,
> and Fan , And I have yet to have a Problem  I also put the Same 
Power
> supply on My 224.740 Repeater that Scott Built for Me . 
>  
> I just put a Motorola Sticker over Astron , Heck now it runs cooler 
and
> gave me more Amps  Just  by adding that Sticker Ha Ha 
>  
> A Man has to know their limitations 
>  
> Happy Repeater Building 
>  
> Don KA9QJG 
> ._,___
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

The diodes CR1 and CR2 are compression-fitted style rectifier diodes 
that are pressed into a rectangle stock of aluminum, and the aluminum 
is then secured to the chassis via two screws.  The diodes have one 
solder lug terminal.  

The service manual only lists the Motorola part #; no specs or 
industry-standard part # is given. Same on the caps. Only spec given 
is 27,000 uf @ 20wvdc.  

I did a quick search of Mouser and DigiKey, and was unable to find 
any chassis-mount style caps. Anyone find something suitable that can 
be re-secured to the ps's chassis via new rivets or screws?  I know I 
can just solder in any cap that meets electrical specs, but I would 
like the caps to be secure and not have the ps become a fire hazard 
waiting to happen!

The power supply was still sitting in my truck last night. When I get 
a break today I will take it apart further and see if I can find a 
part # stamped on the diodes and caps that might indicate what the 
real part # is. While I was at the repeater site yesterday I thought 
I saw a 1N stamped on the diodes.  

I would have thought that there would have been someone here on the 
list that has repaired one of these supplies before, so that is why I 
asked.  

Eric
KE2D

[Repeater-Builder] Micor TPN1110A power supply parts ID

[kk2ed]

Good Evening,

I am trying to repair two TPN1110 power supplies. One has bad caps; the 
other has bad rectifier diodes CR1 and CR2.

I tried looking up the part #s in the manual via Motorola Online, but 
the numbers are invalid (no suprise!).

Anyone have any recommendations as to a suitable replacement capacitor, 
and a "1N" equivalent diode part #?   Can they be purchased with 
the stamped mounting piece, or will I need to re-press a 1nxxx diode 
into the existing rectangle aluminum piece?

Thanks
Eric
KE2D

[Repeater-Builder] Re: Comspec TS32P encoder control

[kk2ed]

Thanks, Bob. 

The NPN was my plan if no one had any better suggestion. All I'll 
need to do is tie the CAT's logic pin to a 10K pullup and 2n, 
then tie the collector to the TS32P's op amp input, and the emitter 
to ground.  

At least the CAT will enable the encoder based on rx activity of 
either RX1 or RX2 9 (when linked), and only if the rx's are actually 
active. 

For example, if the receive mode is COS&PL rather than COS only, and 
the encoder was tied directly to COS, then the encoder would thump on 
and off any time the rx squelch popped from noise while the tx is 
active, which could be an issue for some instances like a hub 
repeater. Better to let the controller handle it WHEN possible.

I also don't care for the audio quality thru the CAT controllers. 
Somewhat restricted curve as compared to the others. I would never 
use a CAT on my own repeaters, but this is for someone else, so I'm 
using what they had on hand.

This is a prime case of "you get what you pay for", and where the 
extra money spent for an SCOM or Link is money well spent.  

Eric
KE2D




--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> Add a simple NPN transistor (and two resistor) inverter between the 
CAT and the TS32. Don't fight it, just put on your Borg hat and adapt.
> 
> Of course you know that the CAT only enables its transmit PL when 
there's a valid COR signal on the input. You won't get PL activated 
on CW ID, courtesy beep, or anything else. For all that, you might as 
well just wire your receiver COR to the TS32 and bypass the CAT 
controller.
> 
> Bob M.
> ==
> --- On Thu, 9/11/08, kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > From: kk2ed <[EMAIL PROTECTED]>
> > Subject: [Repeater-Builder] Comspec TS32P encoder control
> > To: Repeater-Builder@yahoogroups.com
> > Date: Thursday, September 11, 2008, 12:58 PM
> > Has anyone controlled the encode function of a TS32P via a
> > CAT 
> > controller's encode logic pin? 
> > 
> > I've wired several SCOM 7330s and Arcom RC210s to
> > factory encoders in 
> > MS2000s, Micors, and even outboard TS32 encoders. The Scom
> > and Arcom 
> > controllers can be configured to set their encode logic for
> > either 
> > active high or active low (active high needed for the
> > aforementioned 
> > units); however my latest project utilizes a CAT200
> > controller, which 
> > only supports active low. 
> > 
> > In the past I've used the logic pin to ground the input
> > of the op-amp 
> > stage on the TS32's encoder, effectively shutting off
> > the encoder.  
> > However, since the CAT controller is active low, that
> > won't work, as 
> > the logic needs to be active high for the op-amp's
> > input to pass. 
> > 
> > I don't prefer to use a relay or audio gate switch on
> > the TS32's 
> > output because the impedance load of the encoder affects
> > the overall 
> > exciter deviation.  If anyone has played with Micors or
> > MSRs, you 
> > know that adding or removing the encoder output from the
> > exciter 
> > changes the load on the modulator stage, resulting in
> > varying repeat 
> > audio deviation levels depending on the state of the
> > encoder 
> > connection (even with zero tone level, ex: reed pulled).
> > Hence the 
> > reason the factory boards control the encoder BEFORE the
> > final tone 
> > output. The final impedance load of the encoder is still
> > present at 
> > all times, with or without encode tone present.
> > 
> > I also can't just switch the ground of the TS32 board,
> > as it is being 
> > used as a full time decoder as well.
> > 
> > Before I add some inverting logic between the CAT
> > controller and the 
> > TS32, does anyone else have any ideas?   
> > 
> > Eric
> > KE2D
>

[Repeater-Builder] Re: wanted: N-female flange mount crimp connectors

[kk2ed]

Thanks for the tip on the ferrules.  I've run into that situation a 
few times, but have usually been able to make them work when needed.

Who is hdcom?   Never heard of them... I'll try to find them on the 
web.

Thanks
Eric


--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> Be careful. The crimp ferrule for double-shielded coax (RG142/400) 
is thinner than what it would be for single-shielded coax (RG58) to 
allow more braid to fit under it, yet still use the same crimping 
tool. Many vendors don't know the difference, and you'll have a heck 
of a time pushing/forcing the ferrule down over two layers of braid. 
The proper connectors are a snug fit but can be pushed down with 
strong fingers.
> 
> Same thing goes for full-size connectors. RG213 (single-shield) vs 
RG214 (double-shield) ferrules are quite different. The inside 
diameter is over 20 thousandths smaller on the 213 connectors and it 
will not fit over two layers. Been there, done that.
> 
> Any problem with buying RF Connectors from places like hdcom?
> 
> Bob M.
> ==
> --- On Thu, 9/11/08, kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > From: kk2ed <[EMAIL PROTECTED]>
> > Subject: [Repeater-Builder] wanted: N-female flange mount crimp 
connectors
> > To: Repeater-Builder@yahoogroups.com
> > Date: Thursday, September 11, 2008, 12:39 PM
> > I'm working on a few projects and need a number of N
> > female flange 
> > mount style connectors, crimp style for RG58/142/400u
> > cable.  Similar 
> > to those found on the side of MSF5000 cabinets. Amphenol
> > part # 082-
> > 5372.  Anyone have any?
> > 
> > Have any of you folks recently needed to refresh your shop
> > stock of 
> > connectors? I mean quality connectors like Amphenol?   Make
> > sure you 
> > are sitting down!   I recently needed to order some N Male
> > connectors 
> > for RG214, and what I used to pay $4-5 for is now $10+,
> > even 
> > wholesale!  DAMN!!!   I should have invested in connectors
> > rather than 
> > the market!
> > 
> > In Dayton this year I hit every used vendor and bought all
> > the 
> > new/unused UG21 N males I could find, and wish I could have
> > found 
> > more.  Seems like I never have enough of them.
> > 
> > Anyway, I'm also looking for Amphenol UG21 (aka 82-202)
> > N males as 
> > well. 
> > 
> > Anyone have surplus stock to sell?
> > 
> > Eric
> > KE2D
> > 609-713-3742
>

[Repeater-Builder] Comspec TS32P encoder control

[kk2ed]

Has anyone controlled the encode function of a TS32P via a CAT 
controller's encode logic pin? 

I've wired several SCOM 7330s and Arcom RC210s to factory encoders in 
MS2000s, Micors, and even outboard TS32 encoders. The Scom and Arcom 
controllers can be configured to set their encode logic for either 
active high or active low (active high needed for the aforementioned 
units); however my latest project utilizes a CAT200 controller, which 
only supports active low. 

In the past I've used the logic pin to ground the input of the op-amp 
stage on the TS32's encoder, effectively shutting off the encoder.  
However, since the CAT controller is active low, that won't work, as 
the logic needs to be active high for the op-amp's input to pass. 

I don't prefer to use a relay or audio gate switch on the TS32's 
output because the impedance load of the encoder affects the overall 
exciter deviation.  If anyone has played with Micors or MSRs, you 
know that adding or removing the encoder output from the exciter 
changes the load on the modulator stage, resulting in varying repeat 
audio deviation levels depending on the state of the encoder 
connection (even with zero tone level, ex: reed pulled). Hence the 
reason the factory boards control the encoder BEFORE the final tone 
output. The final impedance load of the encoder is still present at 
all times, with or without encode tone present.

I also can't just switch the ground of the TS32 board, as it is being 
used as a full time decoder as well.

Before I add some inverting logic between the CAT controller and the 
TS32, does anyone else have any ideas?   

Eric
KE2D

[Repeater-Builder] wanted: N-female flange mount crimp connectors

[kk2ed]

I'm working on a few projects and need a number of N female flange 
mount style connectors, crimp style for RG58/142/400u cable.  Similar 
to those found on the side of MSF5000 cabinets. Amphenol part # 082-
5372.  Anyone have any?

Have any of you folks recently needed to refresh your shop stock of 
connectors? I mean quality connectors like Amphenol?   Make sure you 
are sitting down!   I recently needed to order some N Male connectors 
for RG214, and what I used to pay $4-5 for is now $10+, even 
wholesale!  DAMN!!!   I should have invested in connectors rather than 
the market!

In Dayton this year I hit every used vendor and bought all the 
new/unused UG21 N males I could find, and wish I could have found 
more.  Seems like I never have enough of them.

Anyway, I'm also looking for Amphenol UG21 (aka 82-202) N males as 
well. 

Anyone have surplus stock to sell?

Eric
KE2D
609-713-3742

[building-repeaters] Re: [Repeater-Builder] Re: Micor to 222 MHz PA Conversion

[kk2ed]

I usually retune the tripler filter on my spectrun analyzer/tracking 
generator, and also re-tune the circulator.  So the drive level into 
the amp is fine, and the circulator is ok. It is definitely PA 
issues, such as intermittent substrates, bad chip caps, Z-matches, 
etc... 

I have done the mobile-to-heatsink trick a number of times; more vhf 
than uhf, but 100w uhf mobiles aren't too common anyore around here.

Just looking for a more modern solution.  The mobile trick is 
probably cheaper though.


Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Joe Burkleo" 
<[EMAIL PROTECTED]> wrote:
>
> Eric,
> I just swap the modules from a Mobile into the station PA heatsink 
if
> I have one die. They are the same modules, different heatsink.
> 
> I have found that if you back down the last output stage of the
> exciter a little, the tripler and first stage of the PA is much
> happier and the PA's will last a lot longer during our hour long 
plus
> nets. Doing this I am still able to get well over 75 Watts out of 
the
> PA, but DON'T DO IT. 75 WATTS MAX.
> 
> The other question I have, is have you been retuning the tripler and
> circulator? If not, that could be where part of your problems are
> coming from.
> 
> Good Luck,
> Joe - WA7JAW
> 
> 
> --- In Repeater-Builder@yahoogroups.com, kk2ed@ wrote:
> >
> > Kevin,
> > 
> > I've been meaning to postabout a similar project, and this prompts
> me to ask - have you done this to "rebuild" a UHF amp?
> > 
> > I have several dead TLD-1713 UHF 75w PAs, and need a good PA or 
two
> at the moment. Rather than messing with trying to find Moto
> transistors, caps, and Z-matches, I was thinking of stripping the
> heatsink down, buying two Mx UHF 40-50w modules, and trying to
> combine them.  
> > 
> > I was curious as to how they would hold up under continuously 
linked
> repeater duty
> > 
> > Can you provide some more details on the 'Wilkinson" power 
dividers?
>  I have experience with HF torroid combiners/splitters, but UHF is
> another animal altogether.  Do you sell them with the boards? 
> > 
> > Is it as simple as mounting the two modules (and the supporting RB
> circuit boards), the combiner/splitters, and wiring it all up?  
> > 
> > I'd like to get a UHF one together asap.
> > 
> > Thanks
> > Eric
> > KE2D
>

Re: [building-repeaters] Re: [Repeater-Builder] Re: Micor to 222 MHz PA Conversion

[kk2ed]

Kevin,

I've been meaning to postabout a similar project, and this prompts me to ask - 
have you done this to "rebuild" a UHF amp?

I have several dead TLD-1713 UHF 75w PAs, and need a good PA or two at the 
moment. Rather than messing with trying to find Moto transistors, caps, and 
Z-matches, I was thinking of stripping the heatsink down, buying two Mx UHF 
40-50w modules, and trying to combine them.  

I was curious as to how they would hold up under continuously linked repeater 
duty

Can you provide some more details on the 'Wilkinson" power dividers?  I have 
experience with HF torroid combiners/splitters, but UHF is another animal 
altogether.  Do you sell them with the boards? 

Is it as simple as mounting the two modules (and the supporting RB circuit 
boards), the combiner/splitters, and wiring it all up?  

I'd like to get a UHF one together asap.

Thanks
Eric
KE2D
 

-- Original message -- 
From: Kevin Custer <[EMAIL PROTECTED]> 
Joe Burkleo wrote: 
Kevin
Thanks for the information. I figured that if anyone had tried it you
would be aware.

I was just looking for more than 30 Watts out.
  

Scott and I have been successful in building small IPA's (intermediate power 
amplifiers) that take the power from the exciter and make 3/4 to 1 watt with a 
single transistor.  This stage then feeds a Wilkinson power divider and it 
feeds two of these brick devices.  Another WPD is used to combine the power.  
About 75 to 80 watts is possible.  We have a prototype that has one brick 
module (as the IPA) feeding four more, and over 150 watts is possible. 

We never fully developed the 150 watt high-power version because the single 
brick PA we build will easily deliver enough drive for any good external 220 
PA, however we do have several of the 75 watt versions in service.

Can these modules be considered continuous duty if they are properly
mounted on a Micor station PA chassis.
  

Absolutely - especially if running one or two modules.  

In addition, we actually use the MICOR power set control to retain all of its 
features (SWR protection, power leveling, etc.)  The AMP BD that Scott builds 
has the pass transistor built on it and it is run from the power set control 
lead that originally went to the MICOR PA.

Scott also builds a custom heat spreader that is used to mate the module to the 
MICOR heatsink.  This eliminates the need to machine a flat spot on the 
heatsink that big enough for the surface of the module.  While Scott doesn't 
advertise these, I feel sure he would sell them individually; they are used in 
our custom 220 MICOR conversions.  The heat spreader is not necessary in a 
MASTR II conversion, as there are no protruding 'bosses' for the original 
mounting of the RF power output transistors.  The pictures in this document 
shows the mounting arrangement he has developed:
http://www.repeater-builder.com/products/ampbddocs.pdf

Good luck and let us know how you make out...

Kevin Custer
Repeater Builder



 

[Repeater-Builder] (unknown)

[kk2ed]

I have the following repeaters for sale. 

Three (3) units - all identical and set up the same, as follows:

MSR2000 C73GSB VHF repeater. 100w int duty PA, in 29" compa-station 
cabinet. Professionally wired to a brand new never used Arcom RC-210 repeater 
controller in rack mount case with newer-style (greatly improved S/N ratio) 
Arcom audio delay board. The controller is properly wired to the MSR's 
backplane via an 8-conductor shieled 22ga cable, and the power connection is 
also properly made to the backplane.  Wire-tied to look factory-done, and 
enough slack left to remove/service the controller as needed.

All backplane jumpers and card jumpers set for proper operation with external 
controller. The audio and squelch card has been properly modified to allow the 
controller to fully select between COS, PL, COS&PL, or COS or PL, depending on 
how the controller is programmed by the user.  The card has been set so that 
the presence of PL detect will not affect the carrier squelch. Carrier squelch 
circuit works similar to the Micors - 20db quieting or better results in almost 
no tail. Noisy signals have a long tail. However, the Arcom audio delay board 
mutes the tails anyway, so they are never heard regardless. Great for vhf 
mobiles which usually flutter a lot.

The repeater has been fully aligned to factory specs for 0.25uv/12db sinad 
receive sensitivity and the PA makes full power in excess of 100w. However, for 
amateur use, especially during long nets or linked systems, these PAs should be 
derated to 60-80w or so and fans added, and they will last forever. 

Factory encode/decode PL board present and wired properly to the Arcom 
controller for both rx DECODE (as stated above), as well as tx ENCODE control 
via the controller programming (on, off, follow cos, etc..) 

The repeater is currently set on 146.880TX/146.280RX using my test bench 
channel elements. I will re-crystal the original elements and tune the repeater 
to your desired frequency on receipt of a deposit (basically to cover my 
exposure on the crystals should you cancel).

I had about 17 of these, and have sold a number of them turn-key to various 
radio clubs and repeater owners in the tri-state area, and am more than happy 
to provide references of owners and currently operating units/systems.

Price is $950 turn-key, crystalled and tuned to your frequency, including the 
Arcom controller. The controller package (RC210, AD, case) is worth approx. 
$500 alone. The crystals are $50 themselves, elements on frequency are worth 
$100 or so. So how can you beat a real repeater for $400 before the controller 
and crystals, tuned and ready to go?

I will also sell the repeaters turn-key less the Arcom controller package for 
$475 each, and wire the cables for the controller of your choice so it is plug 
and play upon receipt.

The repeaters will have a 30-day warranty to cover proper operation against 
failure. Free phone/email tech support afterwards. Shipping extra. Due to 
weight, local pickup preferred. I think Fedex Ground or DHL can ship the 
repeater cabinet for around $100 or so. Plus another $15 or so to protect and 
ship the controller separately.

Pictures also available to serious buyers.  Feel free to contact me with any 
questions.

Eric
KE2D
609-713-3742

[Repeater-Builder] LinkComm DVR1 for sale

[kk2ed]

If anyone is interested in a DVR1 for their RLC-Club or RLC-3, I have 
one on Ebay at the moment. Fullly loaded with maximum memory in the 
rack mount case.

Item # 320271103137

http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&rd=1&item=320271103137&ssPageName=STRK:MESE:IT&ih=011

[Repeater-Builder] Re: Icom F1010 data problem

[kk2ed]

There are a few of those half-moon-like solder pads which determine 
where the tx audio coming into the accessory cable is fed - either 
standard mic-level filtered audio, or direct into the modulator 
bypassing all filtering (ie: a pl input). Try setting the jumpers to 
select the correct audio input mode.  I don't have any docs on the 
F1010, but I'm sure it's similar to the rest of the Icom mobiles as 
per above. Sometimes the solder pads are labeled with a letter ( 
A,B,C,etc).

Eric
KE2D




--- In Repeater-Builder@yahoogroups.com, "essexsaxo" <[EMAIL PROTECTED]> 
wrote:
>
> Hi all,
> 
> I'm new to the group, I have been trying to send some POCSAG Data
> through an Icom F1010 to replace an old Motorola GM300 but I don't 
seem
> to be having much luck. I've got the OPC-617 hooked up and the 
radio
> transmits the data but it doesn't seem to set the pagers off. Does 
any
> body know if there are any jumpers on the radios PCB that need to 
be
> broken or soldered to allow the radio to send data?
> 
> any help would be greatly appreciated.
> 
> Dave
>

[Repeater-Builder] Re: Need help IDing Celwave filter

[kk2ed]

Thanks for all the replies on the Celwave filter, including Jeff's 
info.

I picked up a few of these a couple of years ago at Dayton ( the guy 
in the middle of the fleamarket every year that has all those nice 
jumper cable assemblies), and at the time quickly installed one in 
front of a GM300 link radio at another site. My link receiver was 
getting hammered all day long from the 20 or so UHF systems at the 
site mixing with each other, and the filter worked like a champ. The 
receiver has been interference-free ever since. At the time it was a 
fast and sloppy tune, but it has been working ever since. Not too 
critical for a link receiver application, but this time around it is 
going on an MSR2000 repeater receiver, so every db counts!

I was able to tune it quite nicely to pass a window of 440-450MHz 
(give or take) with two nice notches in the 460 and 470 areas, so it 
should take care of a minor issue I have at one of my sites. Just 
under 2db insertion loss including two 24 inch sma to n RG400 jumper 
cables. About 30-40db down above 460MHz, and two nice 50+db notches. 

I should have picked up a few more of these as cheap as they were. 
Although, I did waste a few $$ on some larger filters he had with N 
connectors. Those would not reach above 430MHz, so I eBayed them and 
they went to a Eurpoean ham club. I also wish I would have picked up 
some of the nice sma-bnc or N cables that he was selling this year. 
The time I spent making them up, not including materials, was worth 
more that he was selling them for..



73
Eric
KE2D
www.w2njr.org



--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> At 5/22/2008 19:13, you wrote:
> 
> >Eric,
> >
> >The 9182510Y17 filter is a Motorola product, made by Celwave. 
Call Motorola
> >Parts ID at 800-422-4210, and have the clerk find what the 
Celwave part
> >number is. Then call Celwave (RFS World) to get servicing data. 
It may be
> >a long shot, but also ask the Parts ID clerk what Motorola manual 
covers
> >this filter. You might luck out- if it's not out of print.
> >
> >It may be a good idea to ship the unit back to Celwave for a 
factory
> >conversion to your desired frequency. Such units seldom can be 
moved more
> >than 10 or 15 MHz without loop adjustment.
> 
> I have 3 of these window filters, though not quite the same part # 
> (9182510Y26 & 9182510Y01 and 'Y02).  The Y26 filter tuned into the 
440 band 
> with no problems (as received it was tuned to 409-416 MHz), while 
the Y01 
> needed modification to bring it up into the ham band.  I can't 
remember the 
> details of what I did other than I lengthened the threaded rods by 
> soldering some heavy-gauge solid wire to the ends, & removed a 
wire coupler 
> that was placed between 2 of the sections.
> 
> One of the Y01s/Y02s is on the mountain, so I can't pop it open 
but I may 
> have another one kicking around at work.  If I do & you need the 
mod. 
> details let me know.  The center passband loss should be around 1 
dB.
> 
> Bob NO6B
>

[Repeater-Builder] Need help IDing Celwave filter

[kk2ed]

I have a Celwave filter PN 9182510Y17 MFG date of 2/4/00

It is about 10"x10" square and 1" high, and has SMA connectors, one 
on each side (left/right), and 9 flat-head tuning screws in the 
front (just like the ones on the small 50w duplexers).

It was brand new in the wrapper when I found it. I swept it on my 
tracking generator, and it looked to be some sort of window filter, 
centered at 390MHz or so.  I attempted to retune it to the 444MHz 
range, as I need a filter in front of a preamp at a repeater site to 
clean up some interference from a T-Band system. 

I was able to retune it to provide a nice curve at 444MHz with about 
2db insertion loss, and about 50db down at 460MHz.  It also looks 
like it has one or two notches to the high side, so I could notch 
out a particular 470 frequency if needed. 

The strange thing (why I'm posting) is the tuning behavior. Of the 
nine tuning screws, counting them 1-9 from left to right, screws 1, 
5, and 9 all seem to adjust the passband center freq, screws 3 and 7 
seem to adjust what appears to be two notches (or one if I "pull" 
them together), and screws 2,4,6, and 8 seem to do nothing at all.  

Anyone have any ideas as to exactly what kind of filter this thing 
is, and how to properly tune it?  

As it stands right now, based on how it plots on my 8920's tracking 
generator, it looks like it should make a halfway decent filter for 
in front of a preamp, but I'd like to tune it properly if I can 
figure out how and what kind of filter it was designed to be.


Thanks
Eric
KE2D

[Repeater-Builder] Re: Info Wanted: RE: Motorola Channel Elements parts

[kk2ed]

I have about a dozen Micors on the air with the elements done this 
way, and they are all rock solid. Some sites go from below freezing 
to over 100F in the summer, and they stay right on. They've been 
running close to 10 yrs now.   Other than changing caps, what else 
are they doing that makes their (ICM, etc) job that much better? 
Let's be honest - at today's labor rates, they can't be spending a 
whole heck of a lot of time on each element. I'm sure they just get 
it on frequency and send it out the door!



--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> There IS an article about temperature compensating
> channel elements on r-b. Go to the Technical
> Information section and search for "Why should you
> really spend $50 to re-crystal a channel element or
> ICOM?"
> 
> While the method you describe will get the crystal to
> operate on-frequency at room temperature, it won't
> deal with temperature compensation or aging, which
> could be vital depending on the location of the
> equipment. Many repeaters are at commercial sites and
> having your equipment put out clean, on-frequency,
> properly deviated signals, is the responsible thing to
> do. If the site is only accessible part of the year,
> you don't want to be constantly going up there to
> re-net the channel elements.
> 
> Bob M.
> ==
> --- kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > I posted on this subject awhile back. Do a search on
> > posts by my 
> > user name. 
> > 
> > Basically, there are two caps towards the edge of
> > the circuit board 
> > (opposite of the trimmer/socket end) that vary
> > anywhere from 5-
> > 33pf.  Install the crystal, then play with the value
> > of these two 
> > caps. I have found that I usally need to reduce the
> > capacitance a 
> > little, and the crystals net right on. I've never
> > had to change an 
> > inductor.
> > 
> > Pick up the small capacitor assortment that Radio
> > Shack sells - it 
> > has about 50 caps in the 5-33pf range.   I use them
> > all the time to 
> > replace the original caps in the elements.
> > 
> > Before you start changing the caps, first install
> > the crystal and 
> > fire it up, and while watching your frequency
> > counter or service 
> > monitor, set the warp trimmer to midpoint (halfway
> > between the 
> > lowest and highest freq settings possible). Then
> > start playing with 
> > the capacitor value until the crystal is as close to
> > your desired 
> > frequency as possible. This simple step will ensure
> > that you can 
> > adjust the crystal adequately up or down as needed
> > in the future, as 
> > well as the initial setup. If the capacitor swap
> > gets you within 
> > 2Khz or so, the trimmer should have enough "pull" to
> > net you on 
> > center frequency.
> > 
> > If I recall, the capacitor in question is usually
> > red, and while 
> > holding the element component-side up and plug-in
> > end towards you, 
> > the cap is to the far left corner. 
> > 
> > Speaking of elements, I need to call Bomar tomorrow
> > - a one-year old 
> > 440MHz repeater crystal decided over the weekend to
> > jump 25Khz high -
> > right onto the input of another repeater!  Same PL
> > no less! (Here in 
> > the NE every other 25KHz pair flips low-in hi-out
> > and vice versa)
> > 
> > I think someone was going to take my original post
> > about 
> > compensating elements and place it on
> > repeater-builder, but I never 
> > noticed it there.  Hopefully it will save others
> > some money. It 
> > always amazed me that guys would embark on a large
> > project building, 
> > wiring, and tuning a repeater, but the simple task
> > of re-crystalling 
> > and netting elements always seemed to be
> > intimidating.  Most likely 
> > due to lack of info being published on the subject.
> > 
> > 
> > Eric
> > KE2D
> > 
> > 
> > 
> > 
> > 
> > --- In Repeater-Builder@yahoogroups.com, "w4dg.geo"
> >  wrote:
> > >
> > > 
> > > I recently ordered TX and RX crystals from ICM for
> > the MICOR RT 
> > Station.
> > > I specified the correct FC and FX and catalog #
> > 167380  for MOT 
> > KNX1018C
> > > TX (132-174).  When these crystals were received
> > they would 
> > not "net" on
> > > frequency.  The TX was over 20Khz. high and wou

[Repeater-Builder] Re: Super StationmasterT Omni Fiberglass Antenna, information wanted

[kk2ed]

Good Evening, Eric and group -

Not being a wiseguy, let me clarify that statement- Celwave USED TO 
manufacture the Stationmaster antennas. Now, like everything else 
nowadays, they actually subcontract out the manufacturing of the 
Stationmaster series.  I just bought a PD455-5, and had an extremely 
long delivery time. After multiple ship-date changes, I finally got 
a supervisor on the phone who explained that their "new" 
subcontractor was having line issues.

Sad.  The original factory was a mile from my office. I used to 
drive over and pick up 30 antennas at a clip in the heyday of 
paging.  Also picked up many duplexers and ham antennas over the 
years.  

Oh- it also cost me another $100 to have the antenna delivered. 
Apparently, it was drop-shipped from the subcontracted manufacturer, 
so pickup at their Meriden, CT facility was not in the cards.


Eric
KE2D




--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Joe,
> 
> RFS/Celwave continues to manufacture the Super StationMaster 
antennas
> pioneered by Phelps-Dodge.  Go here:
> 
> for the data sheet.  The PD220-2N antenna is designed to cover the 
142-150
> MHz band, but the gain is limited to 4.8 dBd due to length 
constraints.
> 
> 73, Eric Lemmon WB6FLY
>  
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Joe
> Sent: Monday, April 21, 2008 4:40 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Super StationmasterT Omni Fiberglass 
Antenna,
> information wanted
> 
> Does anyone have the spec sheet for the Super StationmasterT Omni 
> Fiberglass Antenna PD-220 for 2 meters?  All I find are general 
specs 
> from 25-299.9Mhz.  I'm looking for actual gain in dBd and 
bandwidth.
> 
> 73, Joe, K1ike
>

[Repeater-Builder] Re: Info Wanted: RE: Motorola Channel Elements parts

[kk2ed]

I posted on this subject awhile back. Do a search on posts by my 
user name. 

Basically, there are two caps towards the edge of the circuit board 
(opposite of the trimmer/socket end) that vary anywhere from 5-
33pf.  Install the crystal, then play with the value of these two 
caps. I have found that I usally need to reduce the capacitance a 
little, and the crystals net right on. I've never had to change an 
inductor.

Pick up the small capacitor assortment that Radio Shack sells - it 
has about 50 caps in the 5-33pf range.   I use them all the time to 
replace the original caps in the elements.

Before you start changing the caps, first install the crystal and 
fire it up, and while watching your frequency counter or service 
monitor, set the warp trimmer to midpoint (halfway between the 
lowest and highest freq settings possible). Then start playing with 
the capacitor value until the crystal is as close to your desired 
frequency as possible. This simple step will ensure that you can 
adjust the crystal adequately up or down as needed in the future, as 
well as the initial setup. If the capacitor swap gets you within 
2Khz or so, the trimmer should have enough "pull" to net you on 
center frequency.

If I recall, the capacitor in question is usually red, and while 
holding the element component-side up and plug-in end towards you, 
the cap is to the far left corner. 

Speaking of elements, I need to call Bomar tomorrow - a one-year old 
440MHz repeater crystal decided over the weekend to jump 25Khz high -
right onto the input of another repeater!  Same PL no less! (Here in 
the NE every other 25KHz pair flips low-in hi-out and vice versa)

I think someone was going to take my original post about 
compensating elements and place it on repeater-builder, but I never 
noticed it there.  Hopefully it will save others some money. It 
always amazed me that guys would embark on a large project building, 
wiring, and tuning a repeater, but the simple task of re-crystalling 
and netting elements always seemed to be intimidating.  Most likely 
due to lack of info being published on the subject.


Eric
KE2D





--- In Repeater-Builder@yahoogroups.com, "w4dg.geo" <[EMAIL PROTECTED]> wrote:
>
> 
> I recently ordered TX and RX crystals from ICM for the MICOR RT 
Station.
> I specified the correct FC and FX and catalog # 167380  for MOT 
KNX1018C
> TX (132-174).  When these crystals were received they would 
not "net" on
> frequency.  The TX was over 20Khz. high and would not net any 
closer.  I
> notified ICM and their Customer Service Dept., agreed to replace 
the TX
> crystal.  When I received this "replacement "crystal, it was over 
30Khz.
> high!  I sent another email and got a reply from the owner, Royden
> Freeland, W5EMH, stating the following:
> 
> "To get the crystal to tune properly you will need to change L1 to
> 2.6-2.7uh and C6 to 1-10 pf depending on the crystal to get it on
> frequency at close to center trim. Each element was compensated and
> tuned for the original crystal so if you are changing frequency 
very far
> there can be problems.  Motorola generally used a crystal load of 
32pf
> in elements with trimmers and varied components within the element 
to
> bring it on frequency. ICM will be happy to install the crystal and
> compensate the element if you would prefer.  We would charge 
$60.00 to
> install and compensate your element and crystal".
> 
> I have printed out the channel element schmetic and picture (from 
W3KCC)
> repeater-Builders website and see that C6 is the trimmer and L1, 
but no
> values are represented.  Can anyone tell me what the current value 
of
> the inductor L1 is? If it's currently higher in value, can it be
> "rewound" for the 2.7uH inductance ICM references?  I believe 
there is
> enough room to insert a fixed cap of proper C in series to drop the
> tuning range of the C6, to perhaps the 1-10pf.  I have looked at 
Mouser
> Electronics for a trimmer 1- 10pf and 2.7uH axil-lead inductor,
> L1without success.
> 
> If they are available, can you please stear me to where I can 
purchase
> one or both?
> 
> I always thought that you sent ICOM's back for temperature 
compensation
> and not for simple exchance of crystals.  I have never needed to 
to that
> with any GE MASTR series TX & RX or Mocom 70 series or any EF 
Johnson
> series that simply required new crystals.  But again, that was 20 
years
> ago, which is a long time.
> 
> Any advice would be appreciated as I don't need to spend another 
$120 to
> "install the crystal and compensate the element".
> 
> TNX is advance...Dennis - W4DG
>

[Repeater-Builder] Re: TS64 and Micor Repeater Station

[kk2ed]

Pin 29 on J5 sounds vaguely familiar. You should be able to "ohm" it
out from pin 29 BACK to the exciter's factory PL card tone input
pin. If I recall correctly, there are a few card slot pins that tie
back to that exciter J5 pin, as there were a few option cards that
could "inject" tones into the exciter when the application called
for it.

I also prefer to use the connections at the backplane when possible.
Makes it easier to remove and troubleshoot the exciter without
having to deal with soldering and unsoldering wires. Plus it keeps
stray RF and garbage from entering the exciter area. One exception
to this is the PL encode DISABLE function. For some strange reason,
Motorola NEVER ran this line to the exciter thru the main pin
connections, but used a small jumper wire from a tp pin on the
exciter pl board to a tp pin on the tx interconnect board right 
behind the pin socket (TP701??). So in order to implement the 
ability to DISABLE tx pl when warranted, you need to make that jumper
connection from the exciter pl board to the transmitter interconnect 
board. Then, once that connection is established, you can enable or 
disable the PL by grounding one of the pins at J5 (pin 11 maybe -
damn, I need a manual here in my office!). I then wire this pin to 
the PL encode control line of the Arcom or Scom controllers (along 
with the other control and audio lines) so that the transmit PL can 
be controlled by the controller. Great for linking or EchoIRLP usage.

It's been awhile since I put a ComSpec on a Micor. I usually try to
use the Micor OEM Pl boards for a number of reasons - one of course
NOT being the abilty to change PL. I've been lucky enough to have
plenty of reeds to cover my tone choices!

While I'm at it, lately I've been reading a lot about folks having
audio hum and other problems when wiring controllers to Micors and
MSR2000s. I've built and wired close to 30 Micors and MSRs for
myself and other repeater owners, and NOT ONCE had an audio (or any
other) issue with the following method -

Set up the station as a CARRIER SQUELCH repeater. Make sure the
repeater WORKS as a CS repeater. Make sure that JU202 is removed
from the Audio/ Squelch card (Micor stations; MSR jumper on the R1
Audio card is different and a little trickier, can't recall it at
the moment without the manual). This keeps the PL decoder isolated
from the COS signal, and from holding the squelch chip open longer
when a user PL tone is present. The controller will now TRUELY
choose between COR, PL, AND, OR squelch options.


Use an 8 conductor 22guage shieled cable (like that used for custom
RS232 cables), solder the wires to the DB9 controller connector
pins, solder the bare shield to the shell of the DB9 connector.
Then, at the repeater backplane, strip about 12" of the outer
insulation off. Solder the bare shield conductor to the ground plane
of the backplane. Then solder the eight wires to the various points.
I usually get ALL of my signals right at the SQUELCH GATE position,
PINS as follows:

5 - RX COS - green wire
14- RX PL Detect - brown wire
17- RX Audio - blue wire
11 - TX Audio - white wire
18 - PTT - red wire
1 - Ground - black wire

If TX PL encode control is desired, I run that one wire over to the
Exciter pin area for the PL disable pin (#11 on the Micor, again
different on the MSR - Pin 14 on the Coded Squelch MSR position
IIRC)- yellow wire

(PLEASE double check these pin #s - it's late, and this is from
memory - I'm not in my shop with my notes right now)

Orange is a spare. Some folks like orange for PTT instead, since
sometimes RED is equated to VCC (+12v). Then red is spare, or could
be used to bring a pull-up voltage back to the DB connector for
controllers that need pull-up thru a resistor like older ACC or CAT
units.

If using a ComSpec board, you'll need to substitute the ComSpec
board wires for the PL-related functions above. But my experience is
that when properly configured, the Motorola factory PL boards are
unbeatable (other than being locked into whatever reed freqs you
have on hand). Save the money and find your correct frequency
reeds. Two reeds are a lot cheaper than a TS64!

Pull the Squelch Gate card out, plug in the controller, and go. If
the controller is to be taken out of service, unplug it, slide the
SG card back in its slot, and you're temporarily back on the air.
Some (like Skip's notes) wire the cable into the SG card and
implement a toggle switch. The switch breaks the connection to pins
11 (tx audio) and 18 (repeater PTT), and chooses EITHER controller
OR squelch gate control of the repeater. This is a nice option, but
I have NEVER gone back from a controller once it is wired in, so I
don't feel it's worth the extra effort. Other things will break
before the controller.

I also use this same wiring method for my links. Instead of wiring
the cable to a backplane, I install a 16-pin AMP connector to plug
into GM300s, or mini-din connectors for Icom radios.

While I use mostly GM300s for my

[Repeater-Builder] Re: TS64 and Micor Repeater Station

[kk2ed]

Pin 29 on J5 sounds vaguely familiar. You should be able to "ohm" it 
out from pin 29 BACK to the exciter's factory PL card tone input 
pin. If I recall correctly, there are a few card slot pins that tie 
back to that exciter J5 pin, as there were a few option cards that 
could "inject" tones into the exciter when the application called 
for it.

I also prefer to use the connections at the backplane when possible. 
Makes it easier to remove and troubleshoot the exciter without 
having to deal with soldering and unsoldering wires. Plus it keeps 
stray RF and garbage from entering the exciter area.  One exception 
to this is the PL encode DISABLE function. For some strange reason, 
Motorola NEVER ran this line to the exciter thru the main pin 
connections, but used a small jumper wire from a tp pin on the 
exciter to a tp pin on the tx interconnect board right behind the 
pin socket (TP701??). So in order to implement the ability to 
DISABLE tx pl when warranted, you need to make that jumper 
connection from the exciter to the transmitter interconnect board.  
Then, once that connection is established, you can enable or disable 
the PL by grounding one of the pins at J5 (pin 11 maybe -damn, I 
need a manual here in my office!).  I then wire this pin to the PL 
encode control line of the Arcom or Scom controllers (along with the 
other control and audio lines) so that the transmit PL can be 
controlled by the controller. Great for linking or EchoIRLP usage.

It's been awhile since I put a ComSpec on a Micor. I usually try to 
use the Micor OEM Pl boards for a number of reasons - one of course 
NOT being the abilty to change PL. I've been lucky enough to have 
plenty of reeds to cover my tone choices!  

While I'm at it, lately I've been reading a lot about folks having 
audio hum and other problems when wiring controllers to Micors and 
MSR2000s.  I've built and wired close to 30 Micors and MSRs for 
myself and other repeater owners, and NOT ONCE had an audio (or any 
other) issue with the following method - 


Set up the station as a CARRIER SQUELCH repeater. Make sure the 
repeater WORKS as a CS repeater. Make sure that JU202 is removed 
from the Audio/ Squelch card (Micor stations; MSR jumper on the R1 
Audio card is different and a little trickier, can't recall it at 
the moment without the manual). This keeps the PL decoder isolated 
from the COS signal, and from holding the squelch chip open longer 
when a user PL tone is present. The controller will now TRUELY 
choose between COR, PL, AND, OR squelch options.


Use an 8 conductor 22guage shieled cable (like that used for custom 
RS232 cables), solder the wires to the DB9 controller connector 
pins, solder the bare shield to the shell of the DB9 connector. 
Then, at the repeater backplane, strip about 12" of the outer 
insulation off. Solder the bare shield conductor to the ground plane 
of the backplane. Then solder the eight wires to the various points. 
I usually get ALL of my signals right at the SQUELCH GATE position, 
PINS as follows:

5 - RX COS - green wire
14- RX PL Detect - brown wire
17- RX Audio - blue wire
11 - TX Audio - white wire
18 - PTT - red wire
1 - Ground - black wire

If TX PL encode control is desired, I run that one wire over to the 
Exciter pin area for the PL disable pin (#11 on the Micor, again 
different on the MSR - Pin 14 on the Coded Squelch MSR position 
IIRC)- yellow wire

(PLEASE double check these pin #s - it's late, and this is from 
memory - I'm not in my shop with my notes right now)

Orange is a spare. Some folks like orange for PTT instead, since 
sometimes RED is equated to VCC (+12v). Then red is spare, or could 
be used to bring a pull-up voltage back to the DB connector for 
controllers that need pull-up thru a resistor like older ACC or CAT 
units.

If using a ComSpec board, you'll need to substitute the ComSpec 
board wires for the PL-related functions above. But my experience is 
that when properly configured, the Motorola factory PL boards are 
unbeatable (other than being locked into whatever reed freqs you 
have on hand).  Save the money and find your correct frequency 
reeds. Two reeds are a lot cheaper than a TS64!

Pull the Squelch Gate card out, plug in the controller, and go. If 
the controller is to be taken out of service, unplug it, slide the 
SG card back in its slot, and you're temporarily back on the air. 
Some (like Skip's notes) wire the cable into the SG card and 
implement a toggle switch. The switch breaks the connection to pins 
11 (tx audio) and 18 (repeater PTT), and chooses EITHER controller 
OR squelch gate control of the repeater. This is a nice option, but 
I have NEVER gone back from a controller once it is wired in, so I 
don't feel it's worth the extra effort.  Other things will break 
before the controller.

I also use this same wiring method for my links. Instead of wiring 
the cable to a backplane, I install a 16-pin AMP connector to plug 
into GM300s, or mini-din connectors 

[Repeater-Builder] Re: TS64 and Micor Repeater Station

[kk2ed]

There's a pin on the exciter for PL input.  I don't have a Micor 
manual handy at the moment, so I forget the exact pin number. But as 
Ron said, just take a 10k or so resistor, put it in series with the 
PL encode lead of the TS64, and touch the other end to the original 
Micor PL/DPL daughterboard pins on the exciter module. One is the 
tone injection pin. Try one at a time while listening to the 
transmitter. When you hit the right pin, you'll hear the PL tone. 
Crank the pot on the TS64 to max until you find the right pin. Once 
you have the right pin, remove the resistor and re-adjust the pot 
for correct PL deviation. The 10k resistor is enough to protect the 
circuits from any loading or shorting for that temporary "testing".


You can then study the exciter pcb, and trace that pin back to the 
main exciter pins which plug into the transmit interconnect board. 
Or just take that "resistor probe" and touch the exciter pins one at 
a time. Then connect the tone wire to that pin permanently. 
I have seen a few Micor exciters where a jumper was missing between 
the PL input pin (where it plugs into the transmitter interconnect 
board) and the actual injection point circuitry. So the sure-thing 
method is to just try the 6 or 8 pins where the factory encoder 
plugs in. You'll find the right pin with a few pokes.

Maybe someone will chime in with the correct pin #s from the manual.


Eric
KE2D




--- In Repeater-Builder@yahoogroups.com, Ron Wright <[EMAIL PROTECTED]> 
wrote:
>
> Robert,
> 
> Make sure you are inserting CTCSS tone at proper place on the 
Micor.  Since low freq most all TXs have dedicated input in exciter 
for PL tone insertion.  The Micor does.
> 
> Also 100 k is very high.  Would recommend something less than 5 
k.  Want hurt anything here...might not work, but no harm/smoke.  
Forget any caps to ground...maybe one in series, but only to AC 
couple.  Need big one, 10 uf, since low freq.  However, I don't 
think you need one.
> 
> 73, ron, n9ee/r
> 
> 
> 
> 
> >From: georgiaskywarn <[EMAIL PROTECTED]>
> >Date: 2008/03/05 Wed PM 05:55:01 CST
> >To: Repeater-Builder@yahoogroups.com
> >Subject: [Repeater-Builder] TS64 and Micor Repeater Station
> 
> >  
> >I am having trouble getting the TS64 to encode correctly thru a 
Micor
> >Repeater.  I have tried TB3 20 "Mic Hi - Untouched", J5 24 and 29
> >("PL" In Tone and Xmit Input/Mic Hi/Repeat Audio).  I have tried 
this
> >with a 100k resistor in series and other various resistor values 
in
> >series.  I have also even tried .01 and other value cap.s in 
series
> >and to ground.  The orange (PTT Input) is grounded.  Decode is 
working
> >fine.  Nothing is strapped down on the TS64.  
> >
> >Ideas?
> >Thanks,
> >Robert
> >KD4YDC
> >
> >
> 
> 
> Ron Wright, N9EE
> 727-376-6575
> MICRO COMPUTER CONCEPTS
> Owner 146.64 repeater Tampa Bay, FL
> No tone, all are welcome.
>

[Repeater-Builder] Re: MSR2000 UHF PA repair - need part info

[kk2ed]

Hi Skipp,


Thanks for the suggestion on stealing the parts from a Mitrek. Been 
there - done that on a number of VHF Micors, but I wasn't sure if 
the Mitrek used the same devices as the MSR's UHF PA.

Anyway, good news. I found the trouble with PA. Evidently, the trace 
on the combiner substrate, halfway between where the transistor 
module solders to it and where the trace makes the 90 degree bend 
towards the three-way combining, had opened up. I'm guessing that 
since the output path had opened up, the full force of RF from the 
transistor must have dissipated into the 5.6ohm/1watt balancing 
resistor.  

I repaired the trace, and replaced the 1w resistor with a 1/2w for 
the time being to test the amp. Good as new. The amp is meeting full 
output specs. Now I just need to pick up a pair of 5.6ohm/1w carbon 
resistors. Mind as well replace both at the same time to be safe, 
since the tolerance will most likely be different between one old 
and one new one. Probably as hard to find nowadays as a 100w Mitrek!

73
Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> 
wrote:
>
> A better source... 
> 
> Buy the 100 watt UHF Mitrek Mobiles when you can find them. 
> The PA is a near exact duplicate of the MSR UHF 110 unit. 
> 
> After having done it many times... it will still take you 
> at least 2.5+ hours to do the swap if you have every tool and 
> trick ready to go. I wouldn't quote less than 3.5 shop hours 
> to do one. 
> 
> The transistors are integrated and sold only as modules each 
> and there should be at least 3 of the final high power modules 
> in your PA. The module kits are/were not cheap from Motorhead. 
> 
> Good luck and get your specialized tools out. Don't crack the 
> white substrate material or you can trash that entire section. 
> 
> BE SURE TO CHECK THE HARMONIC FILTER... it's probably bad and 
> in many cases the source of the pa failure. 
> 
> cheers, 
> skipp 
> 
> skipp025 at yahoo.com 
> 
> 
> > "kk2ed"  wrote:
> >
> > Good Afternoon,
> > 
> > 
> > I have an MSR2000 UHF 100w PA that died. One of the two 
resistors that 
> > balances the three M2502 final transistors fried, and I suspect 
one or 
> > more of the three transistors failed. 
> > 
> > Anyone repair the 100w UHF PAs before?  I tried to find the 
M2502 from 
> > RF Parts and a few other parts suppliers, and no luck. I'm going 
to 
> > try Motorola parts shortly, but was wondering if anyone knows a 
> > replacement/equivalent or a better source?
> > 
> > Thanks
> > Eric
> > KE2D
> >
>

[Repeater-Builder] MSR2000 UHF PA repair - need part info

[kk2ed]

Good Afternoon,


I have an MSR2000 UHF 100w PA that died. One of the two resistors that 
balances the three M2502 final transistors fried, and I suspect one or 
more of the three transistors failed. 

Anyone repair the 100w UHF PAs before?  I tried to find the M2502 from 
RF Parts and a few other parts suppliers, and no luck. I'm going to 
try Motorola parts shortly, but was wondering if anyone knows a 
replacement/equivalent or a better source?

Thanks
Eric
KE2D

[Repeater-Builder] Re: FS: 37MHz Low Band Mitreks, Maratracs, JEDI chargers

[kk2ed]

My QTH is in Ocean County, NJ. I also have a shop in Monmouth 
County, NJ. I also travel a bit in the tri-state area, so a meet is 
possible. Due to the weight, its probably in the buyer's best 
interest to pick them up anyway.

Eric


--- In Repeater-Builder@yahoogroups.com, "Scott Zimmerman" 
<[EMAIL PROTECTED]> wrote:
>
> Where are you located?
> 
> Scott
> 
> Scott Zimmerman
> Amateur Radio Call N3XCC
> 612 Barnett Road
> Boswell, PA 15531
> - Original Message - 
> From: "kk2ed" <[EMAIL PROTECTED]>
> To: 
> Sent: Friday, February 01, 2008 6:12 PM
> Subject: [Repeater-Builder] Re: FS: 37MHz Low Band Mitreks, 
Maratracs, JEDI 
> chargers
> 
> 
> Sorry, forgot to mention - make offers. Priced right. Someone can
> have the whole lot cheap.  I need to clean my garage! More stuff to
> come!
> 
> 
> --- In Repeater-Builder@yahoogroups.com, "kk2ed"  wrote:
> >
> > I have the following 30-40MHz Low-Band Mitrek and Maratrac radios
> > for sale.  All units are drawer only, with covers. NO Channel
> > Elements, NO power cords, etc.  All were pulled from service and
> > placed in storage many years ago, so they are sold AS IS WHERE 
IS.
> >
> > QTY - MODEL # - NOTES
> >
> > QTY 1 - T51JJA4000DK (reed PL board with one ?? reed factory
> > jumpered for tx/rx)
> > QTY 1 - T51JJA4000AK (reed PL board with two 5Z reeds)
> >
> > QTY 1 - T51JJA4900DL (chip PL board)
> > QTY 2 - T51JJA4000BK (chip PL board)
> > QTY 4 - T51JJA4000DK (chip PL board)
> >
> > QTY 1 - ? High Band Mitrek (2 transistor PA deck)
> > (front face lable removed, so I don,t have the model #)
> >
> > QTY 2 - T81XTA7DA2AK (2 good, on 37MHz)
> >
> > QTY 2 - T81XTA7DA2BK (1 good unit, 1 missing two coils on control
> > logic board)
> > QTY 1 - T81XTA7TA7BK (missing control logic board)
> >
> > QTY 1 - 16CH control head (8ch x 2 zones A&B), mic, power harness
> >
> > QTY 3 - NTN7160A Std 10-hour JEDI series chargers with AC cubes
> (NEW
> > IN BOX)
> > QTY 2 - Extra AC cubes for above (new in box also)
> >
> > Contact Eric KE2D
> > kk2ed@
> > 609-713-3742
> >
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.516 / Virus Database: 269.19.16/1251 - Release Date: 
1/30/2008 
> 9:29 AM
>

[Repeater-Builder] Re: FS: 37MHz Low Band Mitreks, Maratracs, JEDI chargers

[kk2ed]

Sorry, forgot to mention - make offers. Priced right. Someone can 
have the whole lot cheap.  I need to clean my garage! More stuff to 
come!


--- In Repeater-Builder@yahoogroups.com, "kk2ed" <[EMAIL PROTECTED]> wrote:
>
> I have the following 30-40MHz Low-Band Mitrek and Maratrac radios 
> for sale.  All units are drawer only, with covers. NO Channel 
> Elements, NO power cords, etc.  All were pulled from service and 
> placed in storage many years ago, so they are sold AS IS WHERE IS.
> 
> QTY – MODEL # - NOTES
> 
> QTY 1 - T51JJA4000DK (reed PL board with one ?? reed factory 
> jumpered for tx/rx)
> QTY 1 – T51JJA4000AK (reed PL board with two 5Z reeds)
> 
> QTY 1 – T51JJA4900DL (chip PL board)
> QTY 2 – T51JJA4000BK (chip PL board)
> QTY 4 – T51JJA4000DK (chip PL board)
> 
> QTY 1 - ? High Band Mitrek (2 transistor PA deck)
> (front face lable removed, so I don,t have the model #)
> 
> QTY 2 – T81XTA7DA2AK (2 good, on 37MHz)
> 
> QTY 2 – T81XTA7DA2BK (1 good unit, 1 missing two coils on control 
> logic board)
> QTY 1 – T81XTA7TA7BK (missing control logic board)
> 
> QTY 1 – 16CH control head (8ch x 2 zones A&B), mic, power harness
> 
> QTY 3 – NTN7160A Std 10-hour JEDI series chargers with AC cubes 
(NEW 
> IN BOX)
> QTY 2 – Extra AC cubes for above (new in box also)
> 
> Contact Eric KE2D
> [EMAIL PROTECTED]
> 609-713-3742
>

[Repeater-Builder] FS: 37MHz Low Band Mitreks, Maratracs, JEDI chargers

[kk2ed]

I have the following 30-40MHz Low-Band Mitrek and Maratrac radios 
for sale.  All units are drawer only, with covers. NO Channel 
Elements, NO power cords, etc.  All were pulled from service and 
placed in storage many years ago, so they are sold AS IS WHERE IS.

QTY – MODEL # - NOTES

QTY 1 - T51JJA4000DK (reed PL board with one ?? reed factory 
jumpered for tx/rx)
QTY 1 – T51JJA4000AK (reed PL board with two 5Z reeds)

QTY 1 – T51JJA4900DL (chip PL board)
QTY 2 – T51JJA4000BK (chip PL board)
QTY 4 – T51JJA4000DK (chip PL board)

QTY 1 - ? High Band Mitrek (2 transistor PA deck)
(front face lable removed, so I don,t have the model #)

QTY 2 – T81XTA7DA2AK (2 good, on 37MHz)

QTY 2 – T81XTA7DA2BK (1 good unit, 1 missing two coils on control 
logic board)
QTY 1 – T81XTA7TA7BK (missing control logic board)

QTY 1 – 16CH control head (8ch x 2 zones A&B), mic, power harness

QTY 3 – NTN7160A Std 10-hour JEDI series chargers with AC cubes (NEW 
IN BOX)
QTY 2 – Extra AC cubes for above (new in box also)

Contact Eric KE2D
[EMAIL PROTECTED]
609-713-3742

[Repeater-Builder] Re: Micor power supply issue

[kk2ed]

Well it looks like the problem is with the 15,000uf caps. Two of 
them appear to have leaked a brown substance. The power supply is a 
TPN 1110A (or something close - it's still in my truck). 

Has anyone found a suitable replacement caps for these supplies, or 
am I better of junking it and buying another unit?  


Eric
KE2D













--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ 
<[EMAIL PROTECTED]> wrote:
>
> At 09:39 PM 01/17/08, you wrote:
> >Let me clarify a little bit
> >
> >I am using the supply to power the Micor repeater as well as a 
GM300
> >link transceiver.  A few weeks ago I started to notice a slight 
hum
> >on the link radio's transmitted signal.  Now, the hum is so bad, 
and
> >voltage drop significant, that the GM300's transmit signal is 
dirty
> >and sounds like a spurious emitter when transmitting. If I disable
> >the main repeater TX (Micor), so as to lessen the load and only 
have
> >the GM300 transmitting, the hum goes away. Being the GM300 only 
uses
> >the 13.8v output, I'm guessing the other outputs are ok.
> >
> >I forgot to mention - When I stopped at the site the other day, I
> >heard the transformer buzzing, which increased in loudness when 
the
> >repeater was keyed (thus placing a heavier load on the
> >transformer).  Possible transformer or resonant circuit capacitor
> >failure?
> >
> >I will be stopping at the site in the morning to investigate 
further
> >and swap it out with a spare.  I'll report back with my findings
> >later tomorrow.
> >
> >Thanks
> >Eric
> >KE2D
> >
> >
> >
> >
> >
> >--- In Repeater-Builder@yahoogroups.com, Eric Grabowski
> > wrote:
> > >
> > > While I don't have experience with that particular
> > > power supply, the situation you describe is
> > > symptomatic of filter capacitor failure.
> > >
> > > The capacitor's equivalent series resistance (ESR)
> > > becomes so high that it doesn't filter the ac ripple
> > > anymore.
> > >
> > > You should be able to verify this easily by using a
> > > scope to observe the ac ripple on the dc output under
> > > various load conditions.
> > >
> > > Eric KH6CQ
> > >
> > > --- kk2ed  wrote:
> > >
> > > > Good Evening,
> > > >
> > > > I have a Micor 75 station power supply that is
> > > > acting up.  When the
> > > > repeater is idle, the voltage output appears clean.
> > > > But as the load
> > > > is increased (ie: power output increased), the
> > > > voltage sags and I
> > > > get an annoying hum on the tx (indicative of AC
> > > > ripple on the dc
> > > > side?).   It started out as a barely noticeable hum;
> > > > the past few
> > > > days it has gotten to the point where I just shut
> > > > down the
> > > > repeater's tx.
> > > >
> > > > I haven't had a chance to get to the site to swap it
> > > > out with a
> > > > spare. But I'm curious as to what kind of repair I'm
> > > > in for, and
> > > > others' experience with Micor supplies.
> > > >
> > > > What tends to be the failure and/or cause of the
> > > > above condition?
> > > >
> > > > Pass transistor failure? Filter caps? Ferro-resonant
> > > > circuit (cap)?
> > > >
> > > > Thanks for any input
> > > > Eric
> > > > KE2D
> 
> I'll bet it's the resonant capacitor, but as long as you are
> in there you will want to look at every electrolytic.
> 
> Mike WA6ILQ
>

[Repeater-Builder] Re: Micor power supply issue

[kk2ed]

Let me clarify a little bit

I am using the supply to power the Micor repeater as well as a GM300 
link transceiver.  A few weeks ago I started to notice a slight hum 
on the link radio's transmitted signal.  Now, the hum is so bad, and 
voltage drop significant, that the GM300's transmit signal is dirty 
and sounds like a spurious emitter when transmitting. If I disable 
the main repeater TX (Micor), so as to lessen the load and only have 
the GM300 transmitting, the hum goes away. Being the GM300 only uses 
the 13.8v output, I'm guessing the other outputs are ok.  

I forgot to mention - When I stopped at the site the other day, I 
heard the transformer buzzing, which increased in loudness when the 
repeater was keyed (thus placing a heavier load on the 
transformer).  Possible transformer or resonant circuit capacitor 
failure?

I will be stopping at the site in the morning to investigate further 
and swap it out with a spare.  I'll report back with my findings 
later tomorrow.

Thanks
Eric
KE2D





--- In Repeater-Builder@yahoogroups.com, Eric Grabowski 
<[EMAIL PROTECTED]> wrote:
>
> While I don't have experience with that particular
> power supply, the situation you describe is
> symptomatic of filter capacitor failure. 
> 
> The capacitor's equivalent series resistance (ESR)
> becomes so high that it doesn't filter the ac ripple
> anymore. 
> 
> You should be able to verify this easily by using a
> scope to observe the ac ripple on the dc output under
> various load conditions.
> 
> Eric KH6CQ
> 
> --- kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > Good Evening,
> > 
> > I have a Micor 75 station power supply that is
> > acting up.  When the 
> > repeater is idle, the voltage output appears clean.
> > But as the load 
> > is increased (ie: power output increased), the
> > voltage sags and I 
> > get an annoying hum on the tx (indicative of AC
> > ripple on the dc 
> > side?).   It started out as a barely noticeable hum;
> > the past few 
> > days it has gotten to the point where I just shut
> > down the 
> > repeater's tx. 
> > 
> > I haven't had a chance to get to the site to swap it
> > out with a 
> > spare. But I'm curious as to what kind of repair I'm
> > in for, and 
> > others' experience with Micor supplies. 
> > 
> > What tends to be the failure and/or cause of the
> > above condition?
> > 
> > Pass transistor failure? Filter caps? Ferro-resonant
> > circuit (cap)?
> > 
> > Thanks for any input
> > Eric
> > KE2D
> >  
> > 
> > 
> 
> 
> 
>   
_
___
> Never miss a thing.  Make Yahoo your home page. 
> http://www.yahoo.com/r/hs
>

[Repeater-Builder] Micor power supply issue

[kk2ed]

Good Evening,

I have a Micor 75 station power supply that is acting up.  When the 
repeater is idle, the voltage output appears clean. But as the load 
is increased (ie: power output increased), the voltage sags and I 
get an annoying hum on the tx (indicative of AC ripple on the dc 
side?).   It started out as a barely noticeable hum; the past few 
days it has gotten to the point where I just shut down the 
repeater's tx. 

I haven't had a chance to get to the site to swap it out with a 
spare. But I'm curious as to what kind of repair I'm in for, and 
others' experience with Micor supplies. 

What tends to be the failure and/or cause of the above condition?

Pass transistor failure? Filter caps? Ferro-resonant circuit (cap)?

Thanks for any input
Eric
KE2D
 

[Repeater-Builder] Misc repeater items for sale

[kk2ed]

I am selling off some repeater related items and have them listed on 
the famous auction site.  Items include one new and never used RC85 
controller board, a used RC-85, a brand new Link Comm DVR1 in rack case 
that I bought and never used, and some 400MHz window filters.  I'm not 
sure of the posting rules here on repeater builder, but if interested 
in them, search Ebay for the item names and you should be able to find 
them. 

Eric
KE2D

[Repeater-Builder] FS: Kenwood PG-4H cable

[kk2ed]

For sale:

Kenwood PG-4H cable. Brand new in its package.

This cable has an 8-pin round mic plug on one end (like the MC43 and 
MC60 mics), and the other end has an 8-pin RJ45 style modular plug. The 
cable itself is about 5ft long, and is a straight conductor. This cable 
was originally designed to interface the TM-X31A series mobile radios 
to a RC-xx multi radio controller. Almost like an early TM741 or Icom 
901, whereas the radio were used as "band units", and the controller 
controlled them all remotely. 

This cable is also the cable used to interface that series radios to 
the Doug Hall RBI-1 repeater remote base interface. Thus the reason I 
have one left over from the days when I had the RBI-1 (long gone), and 
the reason for posting on repeater-builder.

$18 shipped USPS

Eric
KE2D

[Repeater-Builder] Re: Motorola Purc 5000 As A Repeater?

[kk2ed]

The PURC5000 came in two versions -

Early CxxJLB stations, similar to early MSFs, where the 2732 eprom is 
programmed via the R1801 for frequency, etc.

Later CxxJXB stations, while similar to later MSFs, DID NOT need RSS. 
There is a 10 or 12 button keypad, and a red LED scrolling display 
(similar to the later NUC stations), which can be used to set a 
number of station parameters, such as frequency, key tones, etc.  
HOWEVER, in order to be able to change the frequencies, there is a 
DIP switch on the control board that needs to be turned on to allow 
the changes to take effect. Otherwise, the display will show the 
current frequencies programmed for CH1,CH2, etc, but itnot accept 
changes.

Most of the PURC5000s came with a "link receiver" drawer just below 
the HSO. This is simply a tray with a Micor RF/IF board, a Micor 
style audio/squelch board (usually modified for flat audio by using a 
different resistor value in the preamp op-amp stage before the PL 
filter in/out), and usually a DPL board.  Plus there is a verticle 
interconnect board to tie it all together, supply regulated 9.6v and 
12v from a single 12v feed, and provide all signals out to a 10-pin 
header connector. This header connector then ties to the MSF5000 
control board via a 10-conductor ribbon cable.

I've taken these receiver trays out of old PURC5000s, swapped the 
70MHz RF/IF board with a 450 mobile RF/IF board, swapped the DPL 
board for a PL board, and wired a 8-conductor shielded cable from the 
interconnect board out to a DB9 connector, and ran a fused DC power 
cable into it.  Makes an excellent voting site receiver, or a great 
repeater receiver if using a repeater other than a Micor Compa-
station.

I think I still have a stack of them in my shop. I kept a few for ham 
project when the last of the PURC5000s were decommissioned.  

I can still remember years ago when my Motorola rep would make his 
monthly lunch visit. One day he excitedly called me to tell me he was 
bringing me a new protoype paging transmitter - 300 watts, and he 
could carry it in the trunk of his sedan with only one person needed 
to lift it in and out. Thinking of the 300w PURC5000s, which weren't 
in the shallow compa-station cabinets like MSFs, but rather in 6ft 
tall 24" square cabinets, requiring an army to move, we thought he 
was crazy, until we actually saw it in his trunk. Shortly thereafter, 
60 PURC5000s went to the boneyard, and over 300 Nucleus stations soon 
followed.

Some Motorola trivia - while the PURC5000 was a retrofitted MSF5000, 
the Quantar actually was derived from the Nucleus station, which came 
first.  

Speaking of Nucleus stations - anyone wanting to make a 900 Nucleus 
into a repeater - keep your eyes out for what was known as 
an "ADVANCED CONTROL" Nucleus - basically, instead of an NIU (Network 
Interface Unit which is fed via a satellite synchronous RS232 data 
stream link), the station came with an Advanced Control board, which 
allowed either a standard RF link receiver or wireline control.  
Early versions included a PURC500 style receiver tray bolted below 
the power amplifier (same receiver as the PURC5000s mentioned above), 
while later versions utilized the internal card receiver (like a 
Quantar). 

The link control card is matched to the Station Control Module (SCM), 
so when switching out the link control card, the SCM also needs to be 
replaced. Later version software also required the exciter to be 
replaced whenever the SCM is changed, as they are known as a "matched 
pair" which is factory aligned. 

The advantage of the "Advanced Control" version is that the exciter 
can be modulated in the analog domain - perfect for amateur use.   
Unfortunately, this version is extremely rare, and only a handful 
were sold. It was designed as a replacement for the later PURC5000. 
The main market was those who had RF or wireline linked PURC500O 
simulcast systems, and needed new units for coverage expansion during 
the period after the PURC5000 was discontinued. But by that time, 
most of the larger paging carriers went to satellite-based linking of 
their simulcast networks, and mass converted to NIU-based NUCs, thus 
the reason they are so rare. 

BTW, if any of you have any 900 NUCs sitting in your warehouses, I'll 
buy as many as I can find. Let me know...

Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ 
<[EMAIL PROTECTED]> wrote:
>
> What keypad???
> 
> The PURC 5000 does not have a keypad.
> 
> The Nucleus does, however.  It is the Quantar-based paging
> transmitter that came after the PURC5000.
> 
> The real PURC 5000 came in two flavors.
> Is there a three digit display on the top right of the panel?  If 
so,
> then it takes RSS.
> If there is no display then it takes a 2732 family PROM.
> 
> The MSF page at repeater-builder has all the gory details.
> 
> Mike WA6ILQ
> 
> At 09:08 PM 10/24/07, you wrote:
> >Can the station be programmed via the keypad or does it take RSS?
> >
> >Ran

Re: [Bulk] RE: [Repeater-Builder] RAIN Report: D-STAR Repeater Trustee, K6BIV, Responds to NFCC Letter to the FCC

[kk2ed]

I'm not condoning such operations, but a Band Plan is just that - a 
band plan. If the emitter is otherwise within regulations, a repeater 
on simplex channels may be legal, provided it is under proper 
control. It is similar to an uncoordinated repeater. Unless it is 
causing willful interference, it is not illegal. 

Such practices may not be very popular among the local hams. Bad 
practice, yes.  Illegal, no.  





--- In Repeater-Builder@yahoogroups.com, "Glenn Shaw" 
<[EMAIL PROTECTED]> wrote:
>
> How does he have a repeater on the simplex channels and not get an
> enforcement letter.  Really bad practice,
> 
> Glenn 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Mike 
Mullarkey
> Sent: Saturday, October 13, 2007 9:43 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Bulk] RE: [Repeater-Builder] RAIN Report: D-STAR Repeater 
Trustee,
> K6BIV, Responds to NFCC Letter to the FCC
> 
> Hi John,
> 
>  
> 
> I could expect a reply like this from you. You are the only one in 
Oregon
> that has an odd split both working in the simplex band. For a 
person that is
> in the broadcast business, that has spent many years on the 
coordinating
> council you would know better. Why don't you do like I told you 
several
> years ago and send in paperwork on the channel I told you that 
would work,
> hell it has not seen ac power for over five years and its free for 
the
> taking. Hum, sounds to easy for me. If you do not remember the 
conversation,
> I could refresh your memory if you would like. On the other hand, 
just let
> the other people in the Portland, Oregon area coordinate it. They 
will
> probably put a good repeater up, work by the rules, and maintain the
> repeater the proper way a repeater should be operated.
> 
>  
> 
> Mike Mullarkey (K7PFJ)
> 
>  
> 
> 
> 
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of JOHN MACKEY
> Sent: Friday, October 12, 2007 5:37 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] RAIN Report: D-STAR Repeater 
Trustee, K6BIV,
> Responds to NFCC Letter to the FCC
> 
>  
> 
> I thank Tim for what he has done. I'll be installing 100 mS Digital 
Voice
> Delay boards in all my repeaters so that they are no longer 
repeaters and
> can now all go into the expermintal band.
> 
> -- Original Message --
> Received: Fri, 12 Oct 2007 04:55:08 PM CDT
> From: Nate Duehr <[EMAIL PROTECTED]  >
> To: Repeater-Builder@yahoogroups.com
> 
> Subject: Re: [Repeater-Builder] RAIN Report: D-STAR Repeater 
Trustee, K6BIV,
> Responds to NFCC Letter to the FCC
> 
> > Jay Urish wrote:
> > > Another guy with an 'expert' buddy saying D-Star IS NOT a 
repeater.. 
> > > Never mind the fact that Icom says its a repeater and as you 
> > > transmit on one frequency, your voice comes out of another..Oh 
yea, 
> > > delay is irrelevant..
> > 
> > That's not fair to the content of the interview.
> > 
> > Tim points out that his "expert buddy" convinced not only Tim, 
but the 
> > FCC, specifically Bill Cross, in 2006, that it was NOT a repeater.
> > 
> > Tim did the "right thing" in 2006 and ASKED. And was told, "Not a 
> > repeater. Go ahead." BY THE FCC.
> > 
> > I'm still in the camp that says if it behaves like a repeater, 
and it 
> > needs the same type of protection as a repeater (fixed frequency 
> > service
> > -- even Tim admits he "wanted a coordination" in the interview), 
it's 
> > a repeater. So it should be in the repeater sub-band.
> > 
> > But I also know Tim a little bit -- and just stating that he's 
just a 
> > guy with a "expert buddy" pushing an agenda is blatantly unfair 
and 
> > doesn't cover what the interview really says.
> > 
> > People should listen to the interview, and not go by what the 
peanut 
> > gallery is saying, I think.
> > 
> > What the interview REALLY says is that Tim ASKED for permission 
from 
> > the FCC, and GOT it. He also DOCUMENTED that fact. He has dates 
and
> e-mails.
> > 
> > And only THEN did he put his repeater up on 145.61 in Northern 
California.
> > 
> > No one could ask anything more of him than that!
> > 
> > Now his system is in the cross-hairs of a national debate, about 
> > "letting D-Star out" of the repeater sub-bands... and meanwhile 
he's 
> > been on the air for almost two years without problems.
> > 
> > I could see why he'd be a bit concerned. Hell, I'd have a pretty 
big 
> > beef with that too, if I'd been the "pioneer" and had:
> > 
> > Asked the FCC... GOT PERMISSION... and then found myself sitting 
under 
> > the cross-hairs of the rest of the country.
> > 
> > Ouch.
> > 
> > Tim's not one of the "bad guys" out there. I've talked to him on 
the 
> > phone (for IRLP support purposes a couple of years ago) and met 
him in 
> > person at the IRLP convention (I think in 2005?).
> > 
> > I don't think he would

[Repeater-Builder] Re: Micor Audio Board, TRN 8406 A3 .... ANY IDEAS?

[kk2ed]

Based on your "good audio" report of this board, I'd say it's 
probably out of an old paging link repeater station, which used a 
flat audio version of the audio&squelch card. Next, based on your 
comment of an abnormally long squelch tail, it may have been out of a 
low or mid band base/repeater.  I've used some old A&S boards out of 
old Micor mid-band repeaters, and had the same results - nicer audio 
response than a standard vhf/uhf 6006/6007 station board, but long 
squelch closure.  You can do two things - either change out a few 
caps and resistors in the squelch circuit area to convert the low/mid 
band version to a vhf/uhf version (by looking at the schematics to 
see which components differ), or even easier, take an original 6006/7 
board and change a cap or resistor in the first preamp stage to match 
the frequency response of this 8406 board.

I forget the exact part number or location (I'm at work and my notes 
are home), but if I recall correctly, there's a 0.0056uf cap in the 
feedback circuit on the preamp in the standard boards. IIRC, its 
right next to the other cap that is either in line or disconnected 
based on the jumper used when no pl filter board is present. In the 
flat audio boards, this is replaced with a 15k or so resistor. 

I've found that by adding a 12-15k resistor in series with the 
0.0056uf cap give an almost perfect audio response when run thru a 
repeater controller set for standard audio. Matched with the 
frequency curve of the Micor exciter, the repeat audio is almost 
identical to the input audio.


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
> Hi All,
>  
> Here's another question.  I opened up a VHF RT Station and did not  
find the 
> '4310 or '6006 audio board.  What I found was a TRN 8406 a3??  Also 
on the 
> same board was stamped 22004 also on the PC board is  84D84214L02 
and lastly 
> 1-03-02.
>  
> Anyway, this board has the normal PL board and Vibersponder, and 
the  
> cleanest audio I've heard, but on hell of a squelch tail!  A Moto 
radio/ht  with 
> reverse burst is 100% no tail, but any jap-trac (we must be 
politically  correct 
> ... non-reverse burst radio) leaves on heck of a tail regardless 
of  distance 
> or signal strength.
>  
> I do not have any low band or 800/900 manual around. Any Ideas?
>  
> 73, Brian, WD9HSY
>

[Repeater-Builder] Re: PD455 Super Station Master feedline connector identification help needed

[kk2ed]

Forgot to add - the part is stamped as follows:

50896  0410-25


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "kk2ed" <[EMAIL PROTECTED]> wrote:
>
> Good Aftenoon, 
> 
> I just uploaded three photos to the folder labeled "PD455 
Antenna".  
> Please take a look at the photos and see if you can help me 
identify 
> who makes this part.
> 
> It is some sort of RF adapter which Celwave/RFS uses in the 
> manufacturing process when making PD455 style antennas.
> 
> Basically, it is threaded up into the base portion of the antenna, 
> and once installed, it appears as if the antenna is terminated with 
> an N Female jack. In reality, the antenna is actually terminated 
with 
> some sort of propietary (guessing?) connection, which this adapter 
> converts to an industry standard N Female, as specified in their 
> product literature. This so-called propietary connection appears to 
> be quite similar to a UHF termination, but a close inspection of 
the 
> photos will show that the center insulation design is slightlty 
> different, and the male pin up inside the threaded male end of the 
> antenna itself looks deeper than a standard UHF male connection.
> 
> Calls to RFS have been useless. They claim there are "no 
replacement 
> parts" available for the Stationmaster antennas, and they do not 
> repair them. Hard to believe that a $1000 antenna is considered 
throw-
> away material nowadays.  I have contacted all of the RF connector 
> manufacturers which I could think of (Amphenol, Kings, Delta), and 
> while the part resembles either an Amphenol or Delta part, neither 
> claim to make it. 
> 
> As you can see in the photos, what had happened is that a 1/2" 
Heliax 
> jumper connected to the antenna became loose at 400+ft in the air, 
> and the center pin arc'ed away. Upon removing the hardline N male 
> connector, I was greeted with a cloud of carbon dust! The N female 
> center pin was burned away. 
> 
> I was able to use a standard UHF Female - N Male adapter coupled to 
> a N Female - N Female adapter, and threaded the UHF end up into the 
> antenna, to sweep the antenna on an analyzer , verifying that the 
> actual antenna itself is still good after being up on a tower for 
10 
> years. I'd like to re-deploy the antenna, but I'm not a big fan of 
> using adapters up on a tower, so I'd like to get the OEM part and 
> properly repair the antenna.
> 
> Anyone have any ideas?
> 
> Eric
> KE2D
>

[Repeater-Builder] PD455 Super Station Master feedline connector identification help needed

[kk2ed]

Good Aftenoon, 

I just uploaded three photos to the folder labeled "PD455 Antenna".  
Please take a look at the photos and see if you can help me identify 
who makes this part.

It is some sort of RF adapter which Celwave/RFS uses in the 
manufacturing process when making PD455 style antennas.

Basically, it is threaded up into the base portion of the antenna, 
and once installed, it appears as if the antenna is terminated with 
an N Female jack. In reality, the antenna is actually terminated with 
some sort of propietary (guessing?) connection, which this adapter 
converts to an industry standard N Female, as specified in their 
product literature. This so-called propietary connection appears to 
be quite similar to a UHF termination, but a close inspection of the 
photos will show that the center insulation design is slightlty 
different, and the male pin up inside the threaded male end of the 
antenna itself looks deeper than a standard UHF male connection.

Calls to RFS have been useless. They claim there are "no replacement 
parts" available for the Stationmaster antennas, and they do not 
repair them. Hard to believe that a $1000 antenna is considered throw-
away material nowadays.  I have contacted all of the RF connector 
manufacturers which I could think of (Amphenol, Kings, Delta), and 
while the part resembles either an Amphenol or Delta part, neither 
claim to make it. 

As you can see in the photos, what had happened is that a 1/2" Heliax 
jumper connected to the antenna became loose at 400+ft in the air, 
and the center pin arc'ed away. Upon removing the hardline N male 
connector, I was greeted with a cloud of carbon dust! The N female 
center pin was burned away. 

I was able to use a standard UHF Female - N Male adapter coupled to 
a N Female - N Female adapter, and threaded the UHF end up into the 
antenna, to sweep the antenna on an analyzer , verifying that the 
actual antenna itself is still good after being up on a tower for 10 
years. I'd like to re-deploy the antenna, but I'm not a big fan of 
using adapters up on a tower, so I'd like to get the OEM part and 
properly repair the antenna.

Anyone have any ideas?

Eric
KE2D

[Repeater-Builder] FS: RLC-3 pkg

[kk2ed]

I have the following for sale:

RLC-3 controller package consisting of:
Four radio cards
One I/O card
Internal 75 second DVR
Internal Autopatch board
Two audio delay boards
(installed on radio cards 1 & 2)
Rack mount case
All boards are the non-surface mount style.
Version 2.15 firmware. Includes printed manual.  No mods or hacks. In 
original / excellent condition. Some minor scratches near the rack 
mount ears from being mounted in a rack (unavoidable).

$1300 shipped CONUS. 

Eric
KE2D

[Repeater-Builder] WTB: 131.8Hz reeds KLN6209/6210

[kk2ed]

Looking for a set of 131.8Hz encode/decode Motorola reeds for a 
Mitrek/MSR2000, #s 6209 & 6210.

Eric
KE2D

[Repeater-Builder] Re: Celwave Stationmaster part identification help needed - RFS is useless

[kk2ed]

Similar, but different.  I have a few of those UHF Female to N Female 
adapters here, but the original Celwave part looks a little longer on 
the UHF side, and the insulating material between the center 
conductor and shell is extended out about 1/8" outside of the 
shell.   I'll take a picture tomorrow morning and post if for all to 
see.  

Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Jimmy Powell" <[EMAIL PROTECTED]> 
wrote:
>
> Is this what you are looking for?
> 
>  
> 
> http://www.mouser.com
> <http://www.mouser.com/search/ProductDetail.aspx?
R=1327505virtualkey6780
> virtualkey678-1327505>
> /search/ProductDetail.aspx?R=1327505virtualkey6780virtualkey
>  
> 
> Or this part number on this page?
> 
>  
> 
> RFN1034-1
> 
>  
> 
> http://www.rfparts.com/typen.html
> 
>  
> 
>  
> 
>  
> 
>  
> 
>   _  
> 
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Robin Midgett
> Sent: Saturday, September 08, 2007 9:50 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Re: Celwave Stationmaster part
> identification help needed - RFS is useless
> 
>  
> 
> Hi Eric,
> It appears that a faulty installation of the jumper at the sidearm 
is 
> the beginning of the problems, and eliminating all the adaptors you 
> can is the other component.
> Regarding repairing the antenna: is it feasible to make your own 
> jumper pig tail (perhaps from super flex) and permanently solder 
one 
> end to the antenna feed point? That would eliminate connectors that 
> are inaccessible at the antenna. Make the jumper long enough to 
reach 
> the tower, and ensure it is well attached to the stand off bracket.
> If the radials are what I recall, they're easy if you have the 
> dimensions. IIRC, they're simple flat stock stainless or aluminum 
> pieces with rounded edges, kind of resembling metal tongue 
depressors 
> with a sharp angle bend in one end. I could fab them for you if 
you'd like.
> 
> At 06:06 PM 9/7/2007, you wrote:
> >I called RFS this afternoon. Sad times, indeed. First of all no one
> >there could identify the connector/adapter part. Second of all, 
they
> >claim "no spare parts available" for Stationmaster antennas. I even
> >tried to buy a set of radials for a PD455 that has lost them, and
> >they don't even offer them separately!
> >
> >Anyone have a bad UHF Super StationMaster that they want to sell 
off
> >the radials or coaxial connector/adapter from?
> >
> >To top matters, the antennas aren't even built in the states 
anymore,
> >and are contracted out to a non-RFS company. One more nail in our
> >industrial coffin!
> >
> >One another note - has anyone run a PD455 with and without the
> >radials, and noted the difference in performance?
> >
> >Eric
> >KE2D
> >
> >
> >--- In Repeater-Builder@ <mailto:Repeater-Builder%
40yahoogroups.com>
> yahoogroups.com, "kk2ed"  wrote:
> > >
> > > Good Evening,
> > >
> > > I have a PD455 Super Stationmaster that is about 12 years old. I
> > > recently replaced it due to and SWR issue. I suspected a jumper
> > > issue. But since it is so high up on a tower, I didn't want to 
take
> > > any chances while having the climbers rig the tower, and pay 
twice,
> > > so I went ahead and replaced the antenna as well as the jumper.
> > >
> > > Well, come to find out, the problem was that the LDF4-50 jumper
> >came
> > > loose from the side arm, and the stress pulled the center pin 
in on
> > > the N connector, thus causing an arc condition inside the N 
female
> > > connector at the bottom of the antenna. To make matters worse, 
the
> > > actual N Female termination was half unscrewed from the bottom 
of
> >the
> > > antenna.
> > >
> > > Once on the ground, I decided to unscrew it out completely. To 
my
> > > suprise, it looks like the antenna is actually terminated into
> > > something resembling a UHF male connector embedded into the end 
of
> > > the inner assembly, and a UHF female to N female adapter is 
screwed
> > > in at the factory, providing the N female termination as ordered
> >I'm
> > > guessing that if some other termination (DIN or UHF) is 
ordered, a
> > > different adapter is screwed in.
> > >
> > > Anyone familiar with this adapter, or know where I can obtain 
said
> > > replacement adapter? I have some standard UHF female - N female
> > > barrel adapters,

[Repeater-Builder] Re: Celwave Stationmaster part identification help needed - RFS is useless

[kk2ed]

I tested the antenna using two adapters to get from the UHF male of 
the antenna itself to an N female.  But likewise, I don't like using 
adapters, especially high up on a tower where it's not easy to get to.

The part is labeled (stamped) as follows:

50896 0410-25

The stamping looks just like an Amphenol or Kings style marking.
I tried to search Ampenol, King, and a few others, but can't seem to 
locate the OEM mfg.  Anyone recognize the number above to decipher 
who the OEM is?


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Jack Taylor" <[EMAIL PROTECTED]> 
wrote:
>
> Donno about UHF radials but I've fabricated my own for the VHF 
Stationmasters.  If you
> are unable to locate the desired fitting you may be able to use a 
UHF double female 
> barrel adaptor on the UHF male at the antenna and then use a UG-83 
adaptor (which is 
> a UHF male to type N female).  I personally don't like the idea of 
double adaptors but
> should work in a pinch.
> 
> 73 de Jack - N7OO
> 
>   - Original Message - 
>   From: kk2ed 
>   To: Repeater-Builder@yahoogroups.com 
>   Sent: Friday, September 07, 2007 4:06 PM
>   Subject: [Repeater-Builder] Re: Celwave Stationmaster part 
identification help needed - RFS is useless
> 
> 
>   I called RFS this afternoon. Sad times, indeed. First of all no 
one 
>   there could identify the connector/adapter part. Second of all, 
they 
>   claim "no spare parts available" for Stationmaster antennas. I 
even 
>   tried to buy a set of radials for a PD455 that has lost them, and 
>   they don't even offer them separately!
> 
>   Anyone have a bad UHF Super StationMaster that they want to sell 
off 
>   the radials or coaxial connector/adapter from?
> 
>   To top matters, the antennas aren't even built in the states 
anymore, 
>   and are contracted out to a non-RFS company. One more nail in our 
>   industrial coffin!
> 
>   One another note - has anyone run a PD455 with and without the 
>   radials, and noted the difference in performance?
> 
>   Eric
>   KE2D
> 
>   --- In Repeater-Builder@yahoogroups.com, "kk2ed"  wrote:
>   >
>   > Good Evening,
>   > 
>   > I have a PD455 Super Stationmaster that is about 12 years old. 
I 
>   > recently replaced it due to and SWR issue. I suspected a jumper 
>   > issue. But since it is so high up on a tower, I didn't want to 
take 
>   > any chances while having the climbers rig the tower, and pay 
twice, 
>   > so I went ahead and replaced the antenna as well as the jumper. 
>   > 
>   > Well, come to find out, the problem was that the LDF4-50 jumper 
>   came 
>   > loose from the side arm, and the stress pulled the center pin 
in on 
>   > the N connector, thus causing an arc condition inside the N 
female 
>   > connector at the bottom of the antenna. To make matters worse, 
the 
>   > actual N Female termination was half unscrewed from the bottom 
of 
>   the 
>   > antenna. 
>   > 
>   > Once on the ground, I decided to unscrew it out completely. To 
my 
>   > suprise, it looks like the antenna is actually terminated into 
>   > something resembling a UHF male connector embedded into the end 
of 
>   > the inner assembly, and a UHF female to N female adapter is 
screwed 
>   > in at the factory, providing the N female termination as 
ordered 
>   I'm 
>   > guessing that if some other termination (DIN or UHF) is 
ordered, a 
>   > different adapter is screwed in.
>   > 
>   > Anyone familiar with this adapter, or know where I can obtain 
said 
>   > replacement adapter? I have some standard UHF female - N female 
>   > barrel adapters, but they are much shorter and not of the 
quality 
>   > like the Celwave unit. I don't want to trust a cheap adapter at 
>   500ft 
>   > in the air! 
>   > 
>   > I'll call RFS when I get a chance, but based on recent 
>   correspondence 
>   > with them, I don't hold much hope getting any support from 
them. 
>   Sad 
>   > part is their old factory in Marboro NJ was a mile from my 
office - 
>   > in the early 90's telecom boom days I used to drive my truck 
there 
>   > and pick 30 Statiomasters up at a clip, no cardboard tubes 
needed! 
>   > Now their old office and testing grounds is a strip mall, and 
the 
>   > factory land has been surrounded by million dollar homes!
>   > 
>   > 
>   > Eric
>   > KE2D
>   >
>

[Repeater-Builder] Re: Micor power supply voltage sag

[kk2ed]

Hi Bob,

The PA is ok, as it is working fine with other Micor power supplies. 
Or should I say, the current draw is within spec.  This supply was 
tested in two different Micor systems with the same results. 

I will dive into it this weekend. 

Eric
KE2D

--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> If it's the TPN1110 supply, the PA supply is very
> simple. A ferro-resonant transformer, two diodes, and
> LOTS of capacitors. The transistors are for the
> low-current regulated supply.
> 
> One diode could be open. If so, I'd expect a lot of
> ripple on the supply and low voltage. If one cap was
> bad, I doubt you'd even notice it.
> 
> The PA could also be drawing a lot more than the 25
> amps the supply is rated for, thus giving you less
> voltage to feed it.
> 
> Your wattmeter or load could be in error, thus forcing
> the above condition.
> 
> Bob M.
> ==
> --- kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > Good Afternoon,
> > 
> > While going thru my Micor stuff, I found that one of
> > my station power 
> > supplies (TRN1011?) suffers from voltage sag under
> > load.  I know that 
> > by design the power supply voltage should drop under
> > load. Most will 
> > idle around 15v, then drop to about 13v under load
> > of a 100w PA.  But 
> > this unit is sagging  to almost 11v under heavy
> > loads, thus resulting 
> > in the PA output being lower than normal.   Anyone
> > have this issue 
> > before and know what the cause might be?   One of
> > the two 
> > pass/regulator transistors bad?   Transformer on the
> > way out?  Or bad 
> > cap?  Suggestions appreciated before I tear into it.
> > 
> > Eric
> > KE2D
> 
> 
>   
__
__
> Luggage? GPS? Comic books? 
> Check out fitting gifts for grads at Yahoo! Search
> http://search.yahoo.com/search?
fr=oni_on_mail&p=graduation+gifts&cs=bz
>

[Repeater-Builder] Re: Celwave Stationmaster part identification help needed - RFS is useless

[kk2ed]

I called RFS this afternoon.  Sad times, indeed. First of all no one 
there could identify the connector/adapter part.  Second of all, they 
claim "no spare parts available" for Stationmaster antennas. I even 
tried to buy a set of radials for a PD455 that has lost them, and 
they don't even offer them separately!

Anyone have a bad UHF Super StationMaster that they want to sell off 
the radials or coaxial connector/adapter from?

To top matters, the antennas aren't even built in the states anymore, 
and are contracted out to a non-RFS company.  One more nail in our 
industrial coffin!

One another note - has anyone run a PD455 with and without the 
radials, and noted the difference in performance?

Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "kk2ed" <[EMAIL PROTECTED]> wrote:
>
> Good Evening,
> 
> I have a PD455 Super Stationmaster that is about 12 years old. I 
> recently replaced it due to and SWR issue. I suspected a jumper 
> issue. But since it is so high up on a tower, I didn't want to take 
> any chances while having the climbers rig the tower, and pay twice, 
> so I went ahead and replaced the antenna as well as the jumper.  
> 
> Well, come to find out, the problem was that the LDF4-50 jumper 
came 
> loose from the side arm, and the stress pulled the center pin in on 
> the N connector, thus causing an arc condition inside the N female 
> connector at the bottom of the antenna. To make matters worse, the 
> actual N Female termination was half unscrewed from the bottom of 
the 
> antenna.  
> 
> Once on the ground, I decided to unscrew it out completely. To my 
> suprise, it looks like the antenna is actually terminated into 
> something resembling a UHF male connector embedded into the end of 
> the inner assembly, and a UHF female to N female adapter is screwed 
> in at the factory, providing the N female termination as ordered  
I'm 
> guessing that if some other termination (DIN or UHF) is ordered, a 
> different adapter is screwed in.
> 
> Anyone familiar with this adapter, or know where I can obtain said 
> replacement adapter?  I have some standard UHF female - N female 
> barrel adapters, but they are much shorter and not of the quality 
> like the Celwave unit. I don't want to trust a cheap adapter at 
500ft 
> in the air!   
> 
> I'll call RFS when I get a chance, but based on recent 
correspondence 
> with them, I don't hold much hope getting any support from them.  
Sad 
> part is their old factory in Marboro NJ was a mile from my office - 
> in the early 90's telecom boom days I used to drive my truck there 
> and pick 30 Statiomasters up at a clip, no cardboard tubes needed!  
> Now their old office and testing grounds is a strip mall, and the 
> factory land has been surrounded by million dollar homes!
> 
> 
> Eric
> KE2D
>

[Repeater-Builder] Micor power supply voltage sag

[kk2ed]

Good Afternoon,


While going thru my Micor stuff, I found that one of my station power 
supplies (TRN1011?) suffers from voltage sag under load.  I know that 
by design the power supply voltage should drop under load. Most will 
idle around 15v, then drop to about 13v under load of a 100w PA.  But 
this unit is sagging  to almost 11v under heavy loads, thus resulting 
in the PA output being lower than normal.   Anyone have this issue 
before and know what the cause might be?   One of the two 
pass/regulator transistors bad?   Transformer on the way out?  Or bad 
cap?  Suggestions appreciated before I tear into it.


Eric
KE2D

[Repeater-Builder] RE: Null Fill UHF Base Station Antenna - Bogner Penetrator?

[kk2ed]

Tony,

When I first put my Manahawkin UHF repeater on the air about 12 years 
ago, the site owner had one on the same 400ft level of the tower as 
my Superstationmaster. Since his combiner/trunking system was delayed 
in being deployed, he insisted I play with it and compare his high-
priced Antel wide band null fill antenna to the Superstationmaster. 
He too was curious to know if it was worth the extra dollars.

Well, I did notice a slight improvement in "HT" coverage at about the 
10-12 mile distance.  Mobile coverage in the 10-20 mile range had a 
little less mobile flutter at times, but nothing earth shattering. 
Out at the fringe coverage areas about 40 miles out, the 
Stationmaster was better.  As expected, due to the fact that the null 
fill is developed by forfeiting gain on the horizontal lobe.

Did we see a difference to substantiate the high (2-3x) cost of the 
null fill type antenna - no!

Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Tony L." 
<[EMAIL PROTECTED]> wrote:
>
> Bogner used to manufacture a null fill UHF base station antenna; I 
> think it was called the "Penetrator."  If I remember correctly, 
Celwave 
> manufactured a similar product.  Anyone out there ever use one of 
> these?  If so, were they worth the money?
> 
> I recall they were very heavy and very expensive; I always wondered 
if 
> they really did improve repeater coverage.  I see a few 800 & 900 
MHz 
> models in service; most likely being used by paging companies.  But 
I 
> don't think that I've seen a UHF one in service lately.  In fact, 
the 
> only ones I ever saw were in service at sites using transmitter & 
> receiver combiners.  I think that they were very broadbanded.
> 
> I'd be interested in hearing from anyone who ever used one for a 
ham or 
> GMRS repeater.  Are they still manufactured?
> 
> Thanks.
> 
> 
> 
> Tony
>

[Repeater-Builder] Celwave Stationmaster part identification help needed

[kk2ed]

Good Evening,

I have a PD455 Super Stationmaster that is about 12 years old. I 
recently replaced it due to and SWR issue. I suspected a jumper 
issue. But since it is so high up on a tower, I didn't want to take 
any chances while having the climbers rig the tower, and pay twice, 
so I went ahead and replaced the antenna as well as the jumper.  

Well, come to find out, the problem was that the LDF4-50 jumper came 
loose from the side arm, and the stress pulled the center pin in on 
the N connector, thus causing an arc condition inside the N female 
connector at the bottom of the antenna. To make matters worse, the 
actual N Female termination was half unscrewed from the bottom of the 
antenna.  

Once on the ground, I decided to unscrew it out completely. To my 
suprise, it looks like the antenna is actually terminated into 
something resembling a UHF male connector embedded into the end of 
the inner assembly, and a UHF female to N female adapter is screwed 
in at the factory, providing the N female termination as ordered  I'm 
guessing that if some other termination (DIN or UHF) is ordered, a 
different adapter is screwed in.

Anyone familiar with this adapter, or know where I can obtain said 
replacement adapter?  I have some standard UHF female - N female 
barrel adapters, but they are much shorter and not of the quality 
like the Celwave unit. I don't want to trust a cheap adapter at 500ft 
in the air!   

I'll call RFS when I get a chance, but based on recent correspondence 
with them, I don't hold much hope getting any support from them.  Sad 
part is their old factory in Marboro NJ was a mile from my office - 
in the early 90's telecom boom days I used to drive my truck there 
and pick 30 Statiomasters up at a clip, no cardboard tubes needed!  
Now their old office and testing grounds is a strip mall, and the 
factory land has been surrounded by million dollar homes!


Eric
KE2D

[Repeater-Builder] Celwave 460 antenna on the ham band - what to expect?

[kk2ed]

Good Evening;


I just installed a repeater at a new site, and am a little 
disappointed in the performance. Plots using Radiosoft, which has 
been damn close to predicting the coverage on my other repeaters, led 
me to expect more performance than I am seeing from this site.

I have been waiting for RFS to deliver a 440-450 PD455, which has 
been delayed yet again. So while the tower guys were doing their 
thing, I threw up a PD1151 cut for 450-460.

The site seems to cover a wide area, but the signal is never strong, 
even close in.   The transmitter is on 440.xxx.   I have used one of 
these PD1151 450-460 antennas in the past on a 449.xxx repeater, and 
it plays quite well.

Is it possible that while the 449 system is close enough to the 
design range of 450-460, the 440 system is experiencing the effects 
of being too far from the design frequency range?  THe SWR, while not 
perfect, is about 1.5:1 at 440MHz.   

Does the radiation pattern start to distort that severely when almost 
10MHz from the design/cut frequency of an antenna?

I know a lot of you are using DB420's down in the 440 band with good 
results. Are the dipoles that much more broadband, and less 
suceptible to radiation pattern distortion than the co-linear type 
antennas?

As an experiment, I'm tempted to stick a spare 449.xxx box on the 
antenna over the weekend to see if it plays any better than the 
440.xxx box to confirm or deny this suspicion.  Hopefully, I'll 
receive the ham cut PD455 sooner than later.

Eric
KE2D

[Repeater-Builder] Micor tripler question

[kk2ed]

Good evening;

I had a few bad triplers lying around that I finally decided to 
attempt repairs on.

Using a Micor station in my shop as a test bed, I stripped the 
transistors out of some good 470-490 triplers and repaired two of the 
450-470 units.


Both units make about 2.0 - 2.2 watts output into my 8920a, once the 
filter slugs are tuned for the operating frequency.

While the Motorola manual states output should be around 2 watts, it 
appears 2.0 watts is not enough to properly excite a 1713A power 
amp.  I tried two different amps; one will not excite at all, the 
other will do about 10w out or so. 

I have a known good tripler that was originally in this station, and 
it makes about 2.6 watts, which drives both 1713 amps to 85w or so 
just fine.

What should I be expecting out of a "good" tripler?   The transistors 
I "stole" from the 470 triplers are the exact same part numbers as 
the 450 units, so I don't think the transistors are the issue. Are 
there any other components known to go "soft" in the triplers?

Just to be sure, I tried a few different transistors in the two 
triplers, and the best I could ever get out of them is 2.0w or so. 

Eric
KE2D

[Repeater-Builder] Re: MSR 2000

[kk2ed]

Kevin,  

When I said garbage, I stated "other garbage", and separated from the 
word Micor with commas.  I was not inferring that Micors were garbage.

I agree with you; The Micor is probably the best made RF package of 
all time. In fact, I have more than ten Micors on the air at the 
moment in my linked repeater system, Eight UHF and two VHF stations, 
and a converted mobile UHF that has been running non-stop for over 10 
years. (see www.w2njr.org). Plus a few others I maintain for local 
clubs. 

In the commercial world, I was still buying Micor-based Spectra-Tac 
receiver chassis' from Motorola as late as 1995 for special app 
diagnostic receive sites, and Micor link repeaters. Simply stated, 
there was nothing better available for high-rf sites. Matter of fact, 
when the Nucleus paging station was introduced in 1994, Motorola 
couldn't yet deliver a receiver module that worked properly, and 
implemented a plug in card which interfaced a Spectra-Tac receiver to 
fill the bill. The Nucleus was the platform on which the Quantar 
later evolved.

Add a decent preamp and window filter before the preamp, and the 
receiver performance is hard to beat. Keep a fan on the PAs, and they 
take a beating. Tap rx audio at the right locations, and audio 
quality is great. The squelch circuit is second to NONE. However, 
some of the Micors I was referring to have lost PAs, taken lightning 
hits, or were just put together by those less competent, and were in 
need of work. 

The VHF MSR2000 is also a great performer. Without a preamp, the MSR 
receiver will outperform a Micor receiver. And the MSR receiver will 
tune down to 146MHz much easier without the modifications such as 
those needed to the helical stage on the Micors.

While I agree that the Mitrek squelch is horrible, I disagree on the 
MSR2000 squelch circuit. While the MSR2000 R1 audio & squelch card 
does not use the famous Micor ic chip, it never the less has dual-
level squelching action designed into it, and works as good as the 
Micor squelch.  I have one on the bench right now; a 20db quieting 
signal results in almost silent squelch closure upon removal, and a 
noisy signal results in the typical millisecond squelch crash delay. 
I also have a few on the air, and the squelch is working as described 
and as good as the Micor squelch.

In so many words, the MSR line was made to fill a price point gap 
once the Micor line subsided and the MSF5000 line was introduced. The 
reason we see so many more VHF MSR2000s than UHF ones is that early 
on there was no such animal as a VHF MSF5000 until late in the MSF 
life cycle. 


73,
Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, Kevin Custer <[EMAIL PROTECTED]> 
wrote:
>
> kk2ed wrote:
> > Just a quick comment -
> >
> > I recently bought a pallet of 15xMHz range MSR2000 VHF continuous 
> > duty stations. I sold five of them to a few of the local 
> > radio/repeater clubs to replace their *aging Micors, converted 
> > mobiles, and other garbage not worthy* of sites they are 
fortunate to 
> > have.
> >   
> 
> Just a quick reply
> 
> Micors of any kind, Mobile or Station are not garbage as you state, 
> Eric.  Motorola built the Micor line well into the late 1990's for 
> special uses, where other equipment simply wouldn't fit the bill.
> 
> > Where can you get a repeater better than an 
> > MSR2000 for that?  Converted mobiles are going for as much.
> >   
> 
> The MSR2000 is based on the Motorola Mitrek vintage of equipment.  
The 
> only reason the PA's are worthy are they are a near copy of the 
Micor.  
> The rest of the station is of the same quality as a Mitrek.
> 
> Having years of experience with both the Micor and the Mitrek, I'll 
take 
> the Micor even considering the age.  A properly built Micor Mobile 
will 
> run rings around an MSR2K where selectivity, sensitivity, and 
overload 
> is concerned; and have just as good of audio.
> 
> The MSR2000 has a terrible carrier squelch.  I strongly suggest 
anyone 
> running a MSR2000 to integrate a Link-Comm RLC-MOT (Micor) squelch 
board.
> 
> Compared to the Micor, the MSR2000 was a short-lived product line.
> 
> Kevin Custer
> List Owner
>

[Repeater-Builder] Re: Simple COR & PTT to Echolink serial port interface

[kk2ed]

Jack,

What a great find!

As per my post earlier in the week, I simply took two 1/8" cables, 
one for line in and one for line out, wired them to a DB9M for the 
repeater controller (Arcom RC-210)audio in/out, and used a piece of 
multi-conductor shielded cable to connect to the COS, PTT, and GND 
pins.  I then wired the other end of the COS/PTT/GND cable to a DB9F 
for the serial port. I simply wired the controller PTT to the pc's 
DCD pin (1) thru a 1N914 diode, and wired the controller COS to the 
pc's RTS pin (7) thru a 220 ohm resistor and 1N914 diode.  I set the 
controller COS for active high. RTS provides a hi/lo transition that 
controls the presence of COS to the controller. The controller's PTT 
is internally pulled high at idle state due to the way the PTT LED is 
controlled in the RC210, so it provides a hi/lo COS condition to the 
pc.  I think I needed to invert the COS setting in Echolink.  We set 
the Arcom TX audio and RX audio pots at their mid position, and can 
easily adjust the audio in and out of Echolink via the sound card app 
just fine. The installation is working great, and the audio quality 
is perfect.  Granted, no serial opto isolation or audio isolation, 
but in a clean repeater installation, it works fine.

However, this board is a great deal for the price. It provides some 
added isolation on the audio and control signals for those who need 
it due to hum problems, and it may prevent additional damage if 
lightning gets into a repeater system.

I wish I found this a long time ago. I've modified a handful of 
NOMICs for a few local club repeaters, adding a COS circuit internal 
to the box, and making custom cables to go from the NOMIC to the 
repeater controller.  This board is everything needed to accomplish a 
clean interface from a pc to a controller.

Thanks for the link.  I will be buying a few real soon.

73
Eric
KE2D



--- In Repeater-Builder@yahoogroups.com, "Jack Davis" <[EMAIL PROTECTED]> 
wrote:
>
> Repeater BuilderHow about $30 delivered for a kit?  I have one of 
these and am very impressed at the quality of the parts and circuit 
board.  Took about 20 minutes to assemble and it works great!  It 
ships from India but it only took 7 days to arrive and it even 
includes the 5 pin DIN connector for the radio.  I give it 5 stars!
> 
> http://foxdelta.com/products/echolink.htm
> 
> Jack
> K6YC
>

[Repeater-Builder] Re: MSR 2000

[kk2ed]

Just a quick comment -

I recently bought a pallet of 15xMHz range MSR2000 VHF continuous 
duty stations. I sold five of them to a few of the local 
radio/repeater clubs to replace their aging Micors, converted 
mobiles, and other garbage not worthy of sites they are fortunate to 
have.

The pairs were two 146.4 rx / 147.4 tx, a few on 146.8xx rx / 146.2xx 
rx, and one down in the 145.2xx range.

All have tuned down just fine, both rx and tx, with no mods.  Yes, 
the tuning cap on the 2602 PA was almost maxed out for optimum power, 
but all of the PAs were making in excess of 120w (some 140w+ when the 
power control was set to max.)into the COM120 and Bird 43. The 
receivers all tuned to below 0.30uv for 12db sinad. The 145.xx 
receiver down in the 144 rx range was close, as most of the slugs 
were close to full-in, but never the less, they are all on the air 
and working great. All are running at 80-100w with no issues.

One of them, set to 100w, has been on the air non-stop during the 
recent shuttle mission (via IRLP node audio).  The trick is to add 
some nice 4" fans on or above/below the PA to keep them cool. The PA 
on the station mentioned above never got more than luke warm, even 
after on the air for hours.

The audio quality on the MSRs is fabulous. We used Arcom RC210s on a 
number of them, which interfaced really nice, other than the few 
quirks, like trying to get link courtesy tones to work properly, or 
the annoying design flaw with the audio crosspoint switch loading 
down when an ID and receiver are active at the same time.


BTW, if anyone is looking for a nice clean cont. duty 
MSR2000 VHF repeater, plug-n-play ready to place on the air, I have a 
few left. All clean, complete, tested and working 100%. Have a few 
int. duty VHFs also available (but no one seems to want them when I 
have the cont. duty stations!). I've been selling them complete, turn-
key, crystaled and tuned to requested pairs, and wired for desired 
controller of choice, for $500. Will also install and adjust 
controller if supplied. Where can you get a repeater better than an 
MSR2000 for that?  Converted mobiles are going for as much.


Also, I'm looking for a few of the MSR duplex PL cards, and a set of 
reeds for 131.8Hz.  Anyone?  Trade/cash?

Eric
KE2D






--- In Repeater-Builder@yahoogroups.com, "Jesse Lloyd" <[EMAIL PROTECTED]> 
wrote:
>
> Ahh man, now I don't know what to think, haha.
> 
> 
> On 8/21/07, Dave Hough <[EMAIL PROTECTED]> wrote:
> >
> >   The TLD9232A/B or TLD9242A/B exciter tunes 146-174 mhz and the 
TRD6292A,
> > TRD6302A or TRD6312A receiver tunes 146-174 mhz.
> >
> > The TLD2601A PA tunes from 132-150.8 mhz. and the TLD2602A tunes 
from
> > 150.8-162 mhz
> >
> > Have found the later PA will tune down to 146.64 mhz but the 
variable caps
> > are at max. capacity.
> >
> > Dave, W7GK
> >
> >
> >
> >
> > *Jesse Lloyd <[EMAIL PROTECTED]>* wrote:
> >
> >  Also will the PA move?  I if it's truly a micor one then it 
won't, the
> > splits for those are 132-150.8, 150.8-162, 162-174.  Is it 
exactly the
> > same?
> >
> > On 8/21/07, Jesse Lloyd <[EMAIL PROTECTED]> wrote:
> > >
> > > Hey all,
> > >
> > > Will a MSR 2000  tuned for 172 Mhz tune down to 146 ?  Or is it 
easier
> > > to make a 220 rig out of it?
> > >
> > > Jesse
> > >
> >
> >
> > --
> > Moody friends. Drama queens. Your life? Nope! - their life, your 
story.
> > Play Sims Stories at Yahoo! Games.
> > 
> >
> >  
> >
>

[Repeater-Builder] Simple COR & PTT to Echolink serial port interface

[kk2ed]

Good Afternoon,


Has anyone come up with a simple circuit to tie a repeater 
controller's port to a PC's serial port for Echolink?

I have customized a few Rigblaster type units in the past to add COS 
funtionality, but the more I have looked at them, the more I think 
they are a waste of money.

A simple circuit consisting of a few parts should be enough to adapt 
RTS or DTR for a COS signal to the controller, and the controller's 
PTT to the PC's DSR or DCD input. Most of the commercial interface 
boxes don't really offer any advantage to the audio paths, so hooking 
the sound card directly to the controller's audio in/out paths 
shouldn't be a problem. 


In the past I've simply tied a radio's COS to the PC's DCD input via 
an isolation diode and current-limiting resistor with great success, 
and used the DTR to trigger an NPN transistor across the radio's PTT, 
but obviously things are reversed on a controller.  I was figuring I 
could use RTS as the controller's COS signal, and set the active 
hi/lo on the controller accordingly. For the PTT signal, I might need 
to invert the PTT output of the controller to control DSC or DCD in 
the right active direction.

Anyone have any suggestions or documented circuits before I embark on 
this project? 

Eric
KE2D

[Repeater-Builder] anyone with PD-497 tuning experience?

[kk2ed]

I have a few questions regarding a Celwave PD-497 6-cavity VHF
duplexer.

I have tuned quite a few duplexers in my time, but this one has me
baffled. I have a decent Tektronix spec analyzer with tracking
generator, and also an HP8920A with tracking generator. I have tuned
all kinds of UHF duplexers and a few other brand VHF units with no
trouble, but this Celwave unit is an animal.

First off, trying to tune the rx and tx sides with all three cavities
in series is a real PITA to find the peak of each cavity. I have
also followed the Celwave instruction sheet about tuning each cavity
separately, then reconnecting the interconnection cables and testing
it. I even used 6db pads as called for in the manual.

I have the unit tuned, and my tracking generators show about 1.25db
insersion loss, and 98-100db or rejection at the reject frequency.

However, once connected to a 100w repeater with 0.25uv receiver
sensitivity, the repeater experiences desense to a degree where once
the tx is above 50w or so, the receiver is brought to its knees and
needs about 0.75uv or better to obtain 12db sinad.

The duplexer is as supplied from the factory. The duplexer was
originally delivered from the factory on 147MHz. The original RG214
jumpers between cans are still intact. The interconnecting cables are
all RG214 double silver shield (including the patch cables from the
pa and rx to the duplexer. The same repeaters (I've tried two with
this duplexer) and cables have been connected to two other duplexers,
a Telewave 1554 and a Wacom 674(?) VHF 4-cavity duplexer. Both sets
of duplexers work great with the repeaters. With the tx at 100w, the
receiver is almost as good as with the tx off.

I must be missing something with this PD497 duplexer, or its
specifications are grossly inflated. I am starting to wonder,
because another group I am affiliated with has a PD497 as well, and
they tell me they have to keep their tx at 50w or less to avoid
receiver issues. Their unit was tuned by Celwave some years ago.

Is it possible there has been corrosion inside the cans? Or is there
some special procedure unique to the PD series that I am missing?

Right now I am running the repeater with the Telewave cans (which are
rated at 77db isolation), and it is working great. But I'd like to
have the 100db of the Celwave cans, if I could bet them to deliver in
the "real world"!


Eric
KE2D
www.w2njr.org

[Repeater-Builder] Re: Celwave PD-497 tuning questions

[kk2ed]

Anyone?


--- In Repeater-Builder@yahoogroups.com, "kk2ed" <[EMAIL PROTECTED]> wrote:
>
> Good Afternoon,
> 
> I have a few questions regarding a Celwave PD-497 6-cavity VHF 
> duplexer.
> 
> I have tuned quite a few duplexers in my time, but this one has me 
> baffled.  I have a decent Tektronix spec analyzer with tracking 
> generator, and also an HP8920A with tracking generator.  I have 
tuned 
> all kinds of UHF duplexers and a few other brand VHF units with no 
> trouble, but this Celwave unit is an animal.
> 
> First off, trying to tune the rx and tx sides with all three 
cavities 
> in series is a real PITA to find the peak of each cavity.  I have 
> also followed the Celwave instruction sheet about tuning each 
cavity 
> separately, then reconnecting the interconnection cables and 
testing 
> it. I even used 6db pads as called for in the manual.  
> 
> I have the unit tuned, and my tracking generators show about 1.25db 
> insersion loss, and 98-100db or rejection at the reject frequency.  
> 
> However, once connected to a 100w repeater with 0.25uv receiver 
> sensitivity, the repeater experiences desense to a degree where 
once 
> the tx is above 50w or so, the receiver is brought to its knees and 
> needs about 0.75uv or better to obtain 12db sinad.
> 
> The duplexer is as supplied from the factory. The duplexer was 
> originally delivered from the factory on 147MHz. The original RG214 
> jumpers between cans are still intact. The interconnecting cables 
are 
> all RG214 double silver shield (including the patch cables from the 
> pa and rx to the duplexer. The same repeaters (I've tried two with 
> this duplexer) and cables have been connected to two other 
duplexers, 
> a Telewave 1554 and a Wacom 674(?) VHF 4-cavity duplexer. Both sets 
> of duplexers work great with the repeaters. With the tx at 100w, 
the 
> receiver is almost as good as with the tx off.
> 
> I must be missing something with this PD497 duplexer, or its 
> specifications are grossly inflated.   I am starting to wonder, 
> because another group I am affiliated with has a PD497 as well, and 
> they tell me they have to keep their tx at 50w or less to avoid 
> receiver issues. Their unit was tuned by Celwave some years ago.
> 
> Is it possible there has been corrosion inside the cans?  Or is 
there 
> some special procedure unique to the PD series that I am missing?
> 
> Right now I am running the repeater with the Telewave cans (which 
are 
> rated at 77db isolation), and it is working great. But I'd like to 
> have the 100db of the Celwave cans, if I could bet them to deliver 
in 
> the "real world"!
> 
> Comments or suggestions greatly appreciated!
> 
> Eric
> KE2D
> www.w2njr.org
>

[Repeater-Builder] FS: VHF 375w Micors

[kk2ed]

I have two VHF 375w Micor stations for sale:


Unit #1 - Repeater
375w tube PA driven by 15w exciter driver PA
Full output - tubes good
Non-unified control shelf and exciter/driver pa
Spectra-TAC receiver
Receiver board converted to 132-150 range with factory Micor coils
Unit currently set up on 147.300tx/147.900rx


Unit #2 - Base Station
375w tube PA driven by 15w exciter driver PA
Low output - tubes need replacing (I may have a set)
Non-unified control shelf and exciter/driver pa
NO RECEIVER, but I can supply a Spectra-TAC unit if needed


Local pickup in Ocean County NJ only due to the weight. Will consider 
all offers. Cash preferred, but will trade for the following:
VHF duplexer
UHF MSR2000 cont duty repeater
repeater controller


Eric
KE2D

[Repeater-Builder] Re: A PreAmp war story

[kk2ed]

One very important note - it's a relatively clean site RF-wise at UHF 
freqs, and I have a window filter on the front end before the preamp, 
otherwise forget it with that kind of sensitivity!


--- In Repeater-Builder@yahoogroups.com, "kk2ed" <[EMAIL PROTECTED]> wrote:
>
> I have a site where my GasFet preamp would blow every spring like 
> clockwork. Seems as though once lightning season started, just the 
> static in the air from strikes afar would take it out.  After the 
3rd 
> time, I switched to a bipolar version preamp, and have not touched 
it 
> in 7 years. Not able to tell any difference. The squelch opens 
> at .07uV, the lowest setting on the service monitor. I have to 
either 
> pull the cable or switch the generator output off the RF in and 
over 
> to the Gen out to get the receiver to squelch. (Micor rx, btw).
> 
> 
> 
> 
>  
> 
> --- In Repeater-Builder@yahoogroups.com, "skipp025"  
> wrote:
> >
> > At one location I had an ongoing problem with gasfet preamp 
> failures. 
> > Over time I suspected the failures were done on purpose (yeah 
> people 
> > do those sort of things). . 
> > 
> > I replaced the last blown preamp with a similar spec unit that 
> > contained internal rf bypass switching when transmit power is 
> > detected in the coax line. 
> > 
> > The system has been rock solid since the rf sense switching 
preamp 
> > was placed in service. No more in-line attenuator... and we can 
> > actually control the preamp from the site controller. If the 
preamp 
> > fails we can switch it off (out of line) while the service call 
is 
> > set up. 
> > 
> > cheers, 
> > skipp 
> > 
> > > "JOHN MACKEY"  wrote:
> > > When the ARR pre-amp blows it becomes about a 40DB attenuator, 
> > > just like most other pre-amps
> > >
> >
>

[Repeater-Builder] Re: Preamp

[kk2ed]

When those ARR GasFets blow, it's like having the rx cable 
disconnected from the receiver.  I've had to be within 1/4 mile of a 
site to open the receiver (noisy at that) when responding to a case 
of a blown preamp.


--- In Repeater-Builder@yahoogroups.com, Mathew Quaife <[EMAIL PROTECTED]> 
wrote:
>
> Don, it will attenuate the receive, I had one go bad and nearly 
lost all of the receive on the system.
> 
> Mathew
> 
> 
> Don KA9QJG <[EMAIL PROTECTED]> wrote: 
>  Can anyone who uses a Advanced  Research Preamp on Your Repeater  
Answer this question ,If the Preamp goes Bad dos  that just put 
the Receive back to where it would be without the Pre Amp in Line  or 
will it actually because it went bad Attenuate the Receive. 
>   
>  Thanks Don  
> 
>  
>  
>
> 
>
> -
> Ahhh...imagining that irresistible "new car" smell?
>  Check outnew cars at Yahoo! Autos.
>

[Repeater-Builder] Re: A PreAmp war story

[kk2ed]

I have a site where my GasFet preamp would blow every spring like 
clockwork. Seems as though once lightning season started, just the 
static in the air from strikes afar would take it out.  After the 3rd 
time, I switched to a bipolar version preamp, and have not touched it 
in 7 years. Not able to tell any difference. The squelch opens 
at .07uV, the lowest setting on the service monitor. I have to either 
pull the cable or switch the generator output off the RF in and over 
to the Gen out to get the receiver to squelch. (Micor rx, btw).




 

--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> 
wrote:
>
> At one location I had an ongoing problem with gasfet preamp 
failures. 
> Over time I suspected the failures were done on purpose (yeah 
people 
> do those sort of things). . 
> 
> I replaced the last blown preamp with a similar spec unit that 
> contained internal rf bypass switching when transmit power is 
> detected in the coax line. 
> 
> The system has been rock solid since the rf sense switching preamp 
> was placed in service. No more in-line attenuator... and we can 
> actually control the preamp from the site controller. If the preamp 
> fails we can switch it off (out of line) while the service call is 
> set up. 
> 
> cheers, 
> skipp 
> 
> > "JOHN MACKEY"  wrote:
> > When the ARR pre-amp blows it becomes about a 40DB attenuator, 
> > just like most other pre-amps
> >
>