[Repeater-Builder] Wanted Quantar

[Jesse Lloyd]

Hello All,

Here's a long shot, does anyone have a VHF or UHF Quantar sitting around
that's willing to part with it? (don't laugh you never know :) ).  I need to
be able to move it into the ham band too.

Jesse

Re: [Repeater-Builder] Re: Micor Repeater Low Current Mods

[Jesse Lloyd]

How about this then: in the micor there is a 4 cavity filter on the output
of the exciter.  If I tuned 3 of those cavities properly and detuned the
last so it acts as an -16 dB attenuator would that work in obtaining my 10
mW input into my mobile amp without creating any problems?



On 8/23/07, Kevin Custer <[EMAIL PROTECTED]> wrote:
>
>Jesse,
>
> While your method may work, it likely won't be clean; not ever a good
> thing, especially where a repeater transmitter is concerned.  The Micor VHF
> transmitter, like most FM transmitters, uses Class C RF amplification.  When
> a Class C amplifier is under-driven, or turned down below about 50 or 60% of
> its capability, it can become unstable - spurious.  It is much better to
> select the number of stages, and properly drive them to create the amount of
> power output required.  This also results in the best efficiency, and since
> you won't have excess power to burn in a solar situation, the method I
> suggest is likely better.
>
> Jesse Lloyd wrote:
>
> That PA mod is awesome. I was considering knocking down the power out of
> the exciter to 20 mW by increasing the value of a couple resistors, and then
> feeding it into a 40 Watt M100 PA.  From there I have the ability to vary
> the output power from 5-40 watts (ish).
>
> Jesse
>
>
>
> On 8/22/07, Kevin Custer <[EMAIL PROTECTED]> wrote:
> >
> >   Jesse,
> >
> > You can put a toggle switch on the B+ line going to the Audio PA, this
> > will cut several hundred mA of current draw from the Class AB audio section,
> > and allow it to be connected/turned on when service is required.
> >
> > Since you are working on a VHF unit, you can review the mods on this
> > site where I took a 110 watt PA, hack-sawed it in half, and made a 5 to 12
> > watt PA that is very power efficient:
> > http://www.kuggie.com/ahra/hmftinfo.html
> >
> > I've also been successful in doing the same with only one transistor
> > (the controlled stage) and created a .5 to 2 watt PA.
> >
>
>   
>

RE: [Repeater-Builder] Re service monitor repair

[kf0m]

here is another Midwest repair center for IFR  I have no connection and no
experience with this one It was posted several months back on the list.

http://www.kgelectronics.com/repair.html

John Lock
kf0m at arrl.net

> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Jim
> Sent: Thursday, August 23, 2007 8:01 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Re service monitor repair
>
>
> [EMAIL PROTECTED] wrote:
> > Hi All. Some one posted a address etc for a repair service in the mid
> > west for IFR Products.
> >
> > Could you please post it again.  I seem to have lost it in the 1's &
> > 0's of my computer.
> >
> > Ralph, W7HSG
>
>
> Here's who we've been using:
>
> Cardinal Electronics
> 847-797-7820
> 
>
> They have found problems others couldn't.
>
> --
> Jim Barbour
> WD8CHL
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>

Re: [Repeater-Builder] Spectrum Communications SCR 77 UHF repeater

[Paul Guello]

If I remember right the prom they used had more than
one section and so could be re-programmed.  Just one
jumper needed to be changed to address the new
section.
Paul

--- Ron Wright <[EMAIL PROTECTED]> wrote:

> Tim,
> 
> If the IDer has a PROM then little can and should be
> done to go another way...a new PROM.
> 
> Do you know the PROM part number???  If one reads it
> often one can determine the method used for setting
> up the ID.  Some simply use one to turn on a tong
> gen and a zero to turn off and simply clock a
> counter thur the addresses and maybe use a second
> data line output that gives a 1 or 0 when finished
> to stop.
> 
> If you know the PROM type one might be able to
> program and replace.  One problem is the PROMs are
> so old they are hard to find.
> 
> Depending on the PROM I might be able to help.
> 
> 73, ron, n9ee/r
> 
> 
> 
> >From: wd4chs <[EMAIL PROTECTED]>
> >Date: 2007/08/23 Thu PM 02:37:49 CDT
> >To: Repeater-Builder@yahoogroups.com
> >Subject: [Repeater-Builder] Spectrum Communications
> SCR 77 UHF repeater
> 
> >  
> >I am in need of or someone who knows anything about
> the CWID for a 
> >Spectrum SCR-77 UHF repeater. The CWID it has now
> functions good only 
> >it is not my call. From what I have read about this
> CWIDer you have to 
> >have the manufacturer "burn" a chip for you that
> plugs into the board. 
> >Is there any other way?
> >
> >Thanks,
> >Tim WD4CHS
> >
> >
> 
> 
> Ron Wright, N9EE
> 727-376-6575
> MICRO COMPUTER CONCEPTS
> Owner 146.64 repeater Tampa Bay, FL
> No tone, all are welcome.
> 
> 
> 



   

Be a better Heartthrob. Get better relationship answers from someone who knows. 
Yahoo! Answers - Check it out. 
http://answers.yahoo.com/dir/?link=list&sid=396545433

[Repeater-Builder] Re: best service monitor

[nj902]

I will offer a couple of points for your consideration.

Think about your application a little.  

How often will you use it?  

Are you a "test equipment nut" or are you intimidated by lots of 
bells 
and whistles?

Will you take it into the field a lot?

Will you service the unit yourself?

How important is regular calibration?

These factors can help you evaluate different units.  Some of the 
IFR 
instruments and the HP 8924 can be quite heavy and might be less 
desireable for regular field use.  

Some people have indicated that the IFR 1600 & 1900 and the HP 8920 
units have user interfaces that take some time to master.  On the 
other hand, if you are a regular user or a person who loves 
sophisticated instruments, this can be a plus.

I have several units between work and my personal collection, 
including Motorola R2001D, R2670A, R2670B, HP8920A, Anritsu MT8801B, 
and Aeroflex / IFR 2975.  If forced to pick just one, the 8920 wins 
hands down.  It has more features and better performance 
specifications than just about anything around.

On the other hand, there is the service issue.  Agilent no longer 
supports the 8920A.  The 8920B is supported until sometime next 
year.  If you need service - the per incident charge is more than 
$2800.00 plus S&H.

Compare that to the Motorola [General Dynamics] 2600 series.  
Their "A" models [which are as old as the earliest HP8920A's] are 
still supported.  The flat rate repair for a 2600 / 2670 runs from 
$925.00 to $1450.00 + S&H, depending on the exact model. Calibration 
runs from $475.00 to $675.00. [calibration is included in a flat 
rate repair]

I recently purchased a Motorola R2670A off ebay.  I wanted a digtial 
service monitor since I have put up a 2 meter P25 repeater.  This 
analyzer cost me less than $2K shipped to my door.  It was listed as 
being inoperative.  I took the chance since I knew I could get a 
flat rate repair and my total investment would still be under $4K.

As it turned out, the unit was easily made operational, so I did 
well on that purchase.  It still is no 8920, but is a nice unit with 
a good range of capabilities backed by great support.


-
-

--- In Repeater-Builder@yahoogroups.com, "Kruser" <[EMAIL PROTECTED]> 
wrote:
"... I need a better service monitor ..."

Re: [Repeater-Builder] Re service monitor repair

[w7hsg]

Thanks All for the information re IFR repair

Ralph, W7HSG
> >
> >


--- Begin Message ---
http://www.kgelectronics.com/


[EMAIL PROTECTED] wrote:
> Hi All.
> Some one posted a address etc for a repair service in the mid west for IFR 
> Products.
>
> Could you please post it again.  I seem to have lost it in the 1's & 0's of 
> my computer.
>
> Ralph, W7HSG
>
>   
>
>
begin:vcard
fn:Steve Bosshard
n:Bosshard;Steve
adr:;;503 B. South 25th. Street;Temple;Texas;76504;USA
email;internet:[EMAIL PROTECTED]
tel;work:254-773-1102
tel;fax:254-773-1174
tel;home:254-770-0111
tel;cell:254-624-4230
url:http://www.bosshardradio.com
version:2.1
end:vcard

--- End Message ---

Re: [Repeater-Builder] Spectrum Communications SCR 77 UHF repeater

[Ron Wright]

Tim,

If the IDer has a PROM then little can and should be done to go another way...a 
new PROM.

Do you know the PROM part number???  If one reads it often one can determine 
the method used for setting up the ID.  Some simply use one to turn on a tong 
gen and a zero to turn off and simply clock a counter thur the addresses and 
maybe use a second data line output that gives a 1 or 0 when finished to stop.

If you know the PROM type one might be able to program and replace.  One 
problem is the PROMs are so old they are hard to find.

Depending on the PROM I might be able to help.

73, ron, n9ee/r



>From: wd4chs <[EMAIL PROTECTED]>
>Date: 2007/08/23 Thu PM 02:37:49 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Spectrum Communications SCR 77 UHF repeater

>  
>I am in need of or someone who knows anything about the CWID for a 
>Spectrum SCR-77 UHF repeater. The CWID it has now functions good only 
>it is not my call. From what I have read about this CWIDer you have to 
>have the manufacturer "burn" a chip for you that plugs into the board. 
>Is there any other way?
>
>Thanks,
>Tim WD4CHS
>
>


Ron Wright, N9EE
727-376-6575
MICRO COMPUTER CONCEPTS
Owner 146.64 repeater Tampa Bay, FL
No tone, all are welcome.

RE: [Repeater-Builder] Singer Gertsch repair

[n9wys]

John,

I never saw a guitar that doubled as a sewing machine before...  

Mark - N9WYS

-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of JOHN MACKEY
Sent: Thursday, August 23, 2007 3:12 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Singer Gertsch repair

Anyone know who can repair a Singer Gertsch ?
 

[Repeater-Builder] Singer Gertsch repair

[JOHN MACKEY]

Anyone know who can repair a Singer Gertsch ?

[Repeater-Builder] Spectrum Communications SCR 77 UHF repeater

[wd4chs]

I am in need of or someone who knows anything about the CWID for a 
Spectrum SCR-77 UHF repeater. The CWID it has now functions good only 
it is not my call. From what I have read about this CWIDer you have to 
have the manufacturer "burn" a chip for you that plugs into the board. 
Is there any other way?

Thanks,
Tim WD4CHS

Re: [Repeater-Builder] Re: HP-8920a service monitor

[Nate Duehr]

Tedd Doda wrote:

> I have the introduction/promo video (VHS) which ran the
> unit through it's paces. I was really close to replacing
> my 1500 with one.

I've used both, and like the bigger screen on the HP box, but both do 
the job... I own a 1500 now (finally!) and I can't stress enough to new 
repeater-builders how much having really high quality test gear helps 
with things.

Only thing I'm really hunting for now is a good 40dB or better 
directional coupler for some tests... the ISO-T's I have work, but the 
directional coupler is nicer sometimes...

Nate WY0X

[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
>

RE: [Repeater-Builder] Re: Fwd: FCC Enforcement Action

[Peter Dakota Summerhawk]

Thanks for the information Eric, Got the radios programmed for 2W and
the narrow band and they work great! Like to stay within the rules for
radios as I value my license.

Dakota Summerhawk

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Wednesday, August 22, 2007 9:16 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Fwd: FCC Enforcement Action

Steve,

You are correct.  There are five simplex MURS channels:  151.820,
151.880,
151.940, 154.570, and 154.600 MHz.  The first three are narrow-band
11.25
kHz channels, while the latter two are 20 kHz channels.  All are limited
to
two watts.

My local ARES group uses 16-channel Motorola HT750 radios that were
donated
by the local police department.  We programmed the two 154 MHz MURS
channels
into all radios, along with 14 2m Amateur channels.  Since the MURS is
license-free, we use one of the 154 MHz channels for parades and other
events where non-Hams need to communicate with us.  Nice and legal...

73, Eric Lemmon WB6FLY
 

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Steve S. Bosshard
(NU5D)
Sent: Wednesday, August 22, 2007 7:49 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Fwd: FCC Enforcement Action

I might be mistaken, but seems like MURS channels are narrow band - 12.5

Khz. Don't know about type acceptance, etc, but seems like if they are 
narrow band (and if that is indeed the case) then the 260 should work 
great - lots of folks illegally prm 151.625 and use them anyhow. 73, 
Steve NU5D






 
Yahoo! Groups Links

[Repeater-Builder] Connecting a Tait T800 base radio

[w2efc]

Can anyone help on what pins on a Tait T800 radio to use for setup as a 
repeater. I have a Tait T800 and want to connect a RLC1 Plus controller to it. 
For 
some reason the receiver on the tait receiver does not key up the transmitter. 
Believe it has something to do with the receiver gate circuit. Appreciate any 
assistance.
Tnx Dave W2EFC
[EMAIL PROTECTED]   

Re: [Repeater-Builder] Re: HP-8920a service monitor

[Tedd Doda]

On Wed, 22 Aug 2007 17:03:02 -, skipp025 wrote:

>If everything works... here is a real deal... 

A whole bunch cheaper than when they were first introduced
Skipp! I remember when HP had a booth at Dayton (10 or more
years ago) when they just brought it out. With no options
is was something like 21 or 22K.

I have the introduction/promo video (VHS) which ran the
unit through it's paces. I was really close to replacing
my 1500 with one.

Tedd Doda, VE3TJD
Lazer Audio and Electronics
We've moved!...2492 Cedar Creek RoadAyr, Ontario, Canada, N0B 1E0
Phone: 519-513-0377

[Repeater-Builder] Motorola Quantar - OOPS

[James Delancy]

Sorry about my last post, was meant to go direct!

Re: [Repeater-Builder] Re service monitor repair

[Jim]

[EMAIL PROTECTED] wrote:
> Hi All. Some one posted a address etc for a repair service in the mid
> west for IFR Products.
> 
> Could you please post it again.  I seem to have lost it in the 1's &
> 0's of my computer.
> 
> Ralph, W7HSG


Here's who we've been using:

Cardinal Electronics
847-797-7820


They have found problems others couldn't.

-- 
Jim Barbour
WD8CHL

Re: [Repeater-Builder] Re: MSR 2000

[Kevin Custer]

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: Motorola Quantar - UPDATE

[jarmantr]

James,

   Greetings.  Glad you found a solution.  We just saw your June post 
and would like to swap the other way (R1 for R2 receiver/exciter). I 
am changing frequencies on my fire department Quantar (153.xxx input 
going up to 159.xxx, tx staying at 154.xxx).  If you're still 
interested in the swap, we'd love to hear from you.  Otherwise, tell 
us more about your success story, as maybe we can get the same 
results tuning up-band.  Thanks.

Jeff 

--- In Repeater-Builder@yahoogroups.com, "James Delancy" 
<[EMAIL PROTECTED]> wrote:
>
> Just an update.  The range 2 exciter and receiver tuned just fine 
on the 146
> frequency.  I have tuned many of these in band, and this is my 
first out of
> band attempt.  I was able to get full transmit power out with no 
effort (125
> Watts), modulation compensation, deviation calibration, etc all 
went fine.
> I tuned up the receiver and got -122 dBm (not bad for nearly 4 meg 
out of
> spec!).  I did not have to bypass the existing preselector.  So .. 
with
> that, the unit is still in range 2 configuration, with the amateur 
band
> channels in it.   (Now it will be a mixed mode repeater when I 
figure out
> the logistics of implementation into the system).
> 
> James
> 
> 
> 
> Milt wrote:
> 
>Unfortunatly you will need to swap out the range 2 exciter and 
receiver
> for
> range 1 units.
> 
> Milt
> N3LTQ
>

[Repeater-Builder] WANTED....power control board.

[Pete Theo]

For the MSR 2000.Part TLD 9272 A  or the whole PA.Part for the PA TLD 
2532A.Price?

[Repeater-Builder] Re: Motorola Quantar - UPDATE

[jarmantr]

James,

   Greetings.  It sounds like you have found a solution.  I write 
because I just saw your June post and have an R1 VHF Quantar and need 
to swap to Range 2 for a fire department frequency change (153.xxx to 
159.xxx).  If you were still interested in swapping receivers and 
exciters, we'd love to chat.  Thanks.  If not, tell me more about how 
the specs turned out on your project.
 
-- Jeff  

--- In Repeater-Builder@yahoogroups.com, "James Delancy" 
<[EMAIL PROTECTED]> wrote:
>
> I upgraded the old codeplug version to 13 (I do not like the v14 
windows
> based crap ... so I won't go there).  When I put the frequency in, 
it just
> warned me to correct it (and I answered no).  Then I went through 
all the
> tuning procedures and it tuned up great!  The good surprise was 
when it
> decided that it could do Astro CAI with no problem :)
> 
> ALWAYS ARCHIVE EVERYTHING AT EVERY STEP! Just in case it takes a 
turn for
> the worse!
> 
> 
> James
> 
> 
> 
> 
> On 6/22/07, Bob M. <[EMAIL PROTECTED]> wrote:
> >
> >   So what did you have to do to it? Did the RSS have any
> > restrictions on the frequency entry?
> >
> > Bob M.
> > ==
> >
> > --- James Delancy <[EMAIL PROTECTED] > wrote:
> >
> > > Just an update. The range 2 exciter and receiver
> > > tuned just fine on the 146
> > > frequency. I have tuned many of these in band, and
> > > this is my first out of
> > > band attempt. I was able to get full transmit power
> > > out with no effort (125
> > > Watts), modulation compensation, deviation
> > > calibration, etc all went fine.
> > > I tuned up the receiver and got -122 dBm (not bad
> > > for nearly 4 meg out of
> > > spec!). I did not have to bypass the existing
> > > preselector. So .. with
> > > that, the unit is still in range 2 configuration,
> > > with the amateur band
> > > channels in it. (Now it will be a mixed mode
> > > repeater when I figure out
> > > the logistics of implementation into the system).
> > >
> > > James
> > >
> > > Milt wrote:
> > >
> > > Unfortunatly you will need to swap out the range
> > > 2 exciter and receiver
> > > for
> > > range 1 units.
> > >
> > > Milt
> > > N3LTQ
> >
> > __
> > Take the Internet to Go: Yahoo!Go puts the Internet in your 
pocket: mail,
> > news, photos & more.
> > http://mobile.yahoo.com/go?refer=1GNXIC
> >
> >  
> >
>

[Repeater-Builder] Looking for.....

[Pete T.]

Power control board for the MSR 2000 repeater.part
number TLD 9272 A or the whole PA.Price?


   

Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, 
photos & more. 
http://mobile.yahoo.com/go?refer=1GNXIC

RE: [Repeater-Builder] Re: Fwd: FCC Enforcement Action

[Dakota Summerhawk]

Re: [Repeater-Builder] Re: best service monitor

[jim Hall]

I have also dealt with Rick, outstanding guy
to deal with and helpful. HP 8920 series is
head and shoulders above the rest.

Regards,
Jim

--- skipp025 <[EMAIL PROTECTED]> wrote:

> I've also dealt with Rick at Amtronix... a first
> rate guy and he 
> knows his stuff... 
> 
> cheers, 
> skipp 
> 
> > Leon Ingerick <[EMAIL PROTECTED]> wrote:
> >
> > Also been pleased with my HP-8924c..  Just got it
> from Amtronix last
> week..  Rick who owns Amtronix is also a ham and a
> great guy to deal
> with..
> >
> >   Leon-N2HLT
> >
> >   
> > 
> > DCFluX <[EMAIL PROTECTED]> wrote:
> >   http://www.amtronix.com/
> > 
> > Been pleased with my HP-8924C.
> > 
> > --FluX
> > K3MK
> > 
> > 
> >  
> > 
> >
> > -
> > Take the Internet to Go: Yahoo!Go puts the
> Internet in your pocket:
> mail, news, photos & more.
> >
> 
> 
> 



   

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Re: [Repeater-Builder] Re: Micor Repeater Low Current Mods

[Kevin Custer]

Jesse,

While your method may work, it likely won't be clean; not ever a good 
thing, especially where a repeater transmitter is concerned.  The Micor 
VHF transmitter, like most FM transmitters, uses Class C RF 
amplification.  When a Class C amplifier is under-driven, or turned down 
below about 50 or 60% of its capability, it can become unstable - 
spurious.  It is much better to select the number of stages, and 
properly drive them to create the amount of power output required.  This 
also results in the best efficiency, and since you won't have excess 
power to burn in a solar situation, the method I suggest is likely better.


Jesse Lloyd wrote:
That PA mod is awesome. I was considering knocking down the power out 
of the exciter to 20 mW by increasing the value of a couple resistors, 
and then feeding it into a 40 Watt M100 PA.  From there I have the 
ability to vary the output power from 5-40 watts (ish).


Jesse



On 8/22/07, *Kevin Custer* <[EMAIL PROTECTED] 
> wrote:


Jesse,

You can put a toggle switch on the B+ line going to the Audio PA,
this will cut several hundred mA of current draw from the Class AB
audio section, and allow it to be connected/turned on when service
is required.

Since you are working on a VHF unit, you can review the mods on
this site where I took a 110 watt PA, hack-sawed it in half, and
made a 5 to 12 watt PA that is very power efficient:
http://www.kuggie.com/ahra/hmftinfo.html

I've also been successful in doing the same with only one
transistor (the controlled stage) and created a .5 to 2 watt PA.