Re: [Repeater-Builder] Novice/Technician 2m Frequency Allocations c.1961

[MCH]

I don't think anyone was debating the 145-147 MHz allocation. I made the 
point that the sub-band repeater segment didn't come along until after 
those rules were abolished. I think repeaters were illegal in the 
sub-band at the time, and the inputs would have been out of their band 
if the repeaters had existed. Anyway, I think the sub-band came out 
around the very late 70s or the early 80s.

Joe M.

Tom Allinson wrote:
> For those that still care, here is a copy of the frequency allocations from
> two ARRL publications, both dated 1961.
> It not a great scan but it does convey the desired information.  I was too
> tired last night to take the time to try to clean it up.
> The first two pages are from the AMATEUR RADIO LICENSE MANUAL, copyright
> 1961.  The chart shows the portion of the 2m band allocated to Novices and
> Technicians.
> The second two pages are from the 1961 ARRL HANDBOOK.  At the bottom of that
> chart can be found  the description of Novice and Tech. privileges as well.
> I was there, I was very active in the WB6AAE repeater group at the time AND
> I built, from scratch, the control circuitry and interfaces for the second
> generation two meter repeater for that club, so it is unlikely that my
> memory would have faded over time.
> Tom DGN
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> Internal Virus Database is out of date.
> Checked by AVG - www.avg.com 
> Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 
> 05:58:00
> 

RE: [Repeater-Builder] Programming Software for Standard GX3000 radios

[Barry]

Doug + Marcus you have email 

To: Repeater-Builder@yahoogroups.com
From: arkwrights-st...@xtra.co.nz
Date: Mon, 16 Nov 2009 19:19:33 +1300
Subject: Re: [Repeater-Builder] Programming Software for Standard GX3000 radios


















 



  



  
  
  



actualy there is a good idea, never saw that myself, i to am looking
for some "Backup" software if anyone has for Programming the Tait T800
series 

RAR or Zip'd either, please just don't PW it





Marcus





w9nwn wrote:

 

  
  Just checking to see if anyone might have a copy of the
programming software for the old Standard GX-3000 series of radios. I
can get my hands on a E-prom burner and even a old computer to run the
software on but need the software first. Otherwise I will just use the
mfor door stops.

  

Thanks,

  

Doug W9NWN

  

  

  









 









  
_
Looking for a date? View photos of singles in your area!
http://clk.atdmt.com/NMN/go/150855801/direct/01/

[Repeater-Builder] Tait o/t ? cable information

[Barry]

Can anyone offer assistance with making a programming cable for the tait 700 
series please ?
 Tnx 
 B
  
_
Looking to move this spring? With all the lastest places, searching has never 
been easier. Look now!
http://clk.atdmt.com/NMN/go/157631292/direct/01/

Re: [Repeater-Builder] Programming Software for Standard GX3000 radios

[Marcus]

actualy there is a good idea, never saw that myself, i to am looking for 
some "Backup" software if anyone has for Programming the Tait T800 series

RAR or Zip'd either, please just don't PW it


Marcus


w9nwn wrote:
 

Just checking to see if anyone might have a copy of the programming 
software for the old Standard GX-3000 series of radios. I can get my 
hands on a E-prom burner and even a old computer to run the software 
on but need the software first. Otherwise I will just use the mfor 
door stops.


Thanks,

Doug W9NWN

[Repeater-Builder] Re: Programming Software for Standard GX3000 radios

[wb6dgn]

Do you have the programmer interface?  The GX3000 was programmed by programming 
a ROM segment resident on the 8749 (if I remember correctly) microprocessor.  
You remove the uProc. (socketed) and plug it into either the standalone 
programmer or an interface box connected to a PC with the proper software.  If 
it were me, I'd try to find a two way shop that still has the programmer or, if 
you expect to program it ofter or have multiple radios, I'd look for a stand 
alone programmer.  It programmed through a keypad on the box.  That same setup 
will also program the HX400 series handhelds and a few other older Standard 
radios.
Tom DGN

--- In Repeater-Builder@yahoogroups.com, "w9nwn"  wrote:
>
> Just checking to see if anyone might have a copy of the programming software 
> for the old Standard GX-3000 series of radios. I can get my hands on a E-prom 
> burner and even a old computer to run the software on but need the software 
> first. Otherwise I will just use the mfor door stops.
> 
> Thanks,
> 
> Doug W9NWN
>

RE: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[wa6vpl]

Try this link for SAE CONNECTORS, 12 gauge and various lengths.

 

http://www.solarseller.com/low_voltage_dc_pumps__lvm__teel__accessories__plu
gs_and_extensions.htm

 

 

 

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of n4...@bellsouth.net
Sent: Sunday, November 15, 2009 5:04 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

 

  

Try tower. www.pl259.com

Sent on the SprintR Now Network from my BlackBerryR

  _  

From: "tahrens301"  

Date: Mon, 16 Nov 2009 00:48:54 -

To: 

Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

 

  

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar. I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know. I need about
20 of them.

Thanks,

Tim

[Repeater-Builder] Programming Software for Standard GX3000 radios

[w9nwn]

Just checking to see if anyone might have a copy of the programming software 
for the old Standard GX-3000 series of radios. I can get my hands on a E-prom 
burner and even a old computer to run the software on but need the software 
first. Otherwise I will just use the mfor door stops.

Thanks,

Doug W9NWN

Re: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[n4rqy]

Try tower. www.pl259.com

Sent on the Sprint® Now Network from my BlackBerry®

-Original Message-
From: "tahrens301" 
Date: Mon, 16 Nov 2009 00:48:54 
To: 
Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar.  I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know.  I need about
20 of them.

Thanks,

Tim

Re: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[n4rqy]

Tower calls them 2 pin dc disconnects.they are virtually impossible to get 
in 12 guage wire, but tower has the 10 and 14 guage wire with the 2 pin trailer 
plug.  An auto parts store has them, but those are usually 16 guage wire and 
not suitable for heavy current loads.
Sent on the Sprint® Now Network from my BlackBerry®

-Original Message-
From: "tahrens301" 
Date: Mon, 16 Nov 2009 00:48:54 
To: 
Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar.  I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know.  I need about
20 of them.

Thanks,

Tim

[Repeater-Builder] Whats it worth Phelps Dodge UHF Duplexers

[K5IN]

What's it worth: Model 526-509 6 can UHF duplexer tuned for 441.950 transmit 
and 446.950 receive.



Brian, k5in 

[Repeater-Builder] MSF-5000 VCO problem

[hl31943]

I have a CXB UHF repeater and can't get the receive VCO to lock properly. I get 
a peak of about 23 uA but it doesn't lock there. If I tune to where it will 
lock, the M5 reading is about 13 uA. I've taken the VCO apart twice and cleaned 
it.

Is substituting the transmit VCO (which does lock at 38 uA)a valid test of 
anything? I've also posted this problem on the MSF-5000 group, but no answer so 
far.

I'm probably in the market for a replacement VCO if anyone has one available. 
Suggestions would be appreciated.

73,
Howard
WB4GUD

[Repeater-Builder] Re: O.T. Looking for Jody n7ert

[rrath]

Thank you Larry.

Rod kc7vqr

[Repeater-Builder] O.T. Looking for Jody n7ert

[rrath]

I am looking for Jody, n7ert. Any one 
has his email address? Thank you.
Rod kc7vqr

RE: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[Jeff DePolo]

I have dimensional data for both Decibel and Celwave lowband folded dipoles
*somewhere*.  If there's interest I'll hunt for them.  

I think the Celwave design (with the "stingers") would be easier to
fabricate - no bending involved.

--- Jeff WN3A
 

> -Original Message-
> From: Repeater-Builder@yahoogroups.com 
> [mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025
> Sent: Sunday, November 15, 2009 10:57 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Building Low Band Loop 
> Antennas (DB-212)
> 
>   
> 
> 
> > "Chuck Kelsey"  wrote:
> > FYI - Sinclair got the extra bandwidth by stager tuning 
> > the antenna element from the 1/4-wave matching transformer 
> > that is inside the element. The trade-off was a decrease 
> > in return loss (higher VSWR).
> > Chuck
> > WB2EDV
> 
> Maybe... maybe not. I swept one just a short time back and 
> the return loss was about 15.6 dB, which makes it a very nice 
> usable animal. 
> 
> I've also had one in parts and the matching coax length was 
> what I would have expected. Somewhere in my notes I have all 
> the construction information recorded like I did on the Decibel 
> Antennas...
> 
> I've got a Decibel Loop at the old shop somewhere... if I can 
> easily get it up high enough to throw a sweep on it I can 
> report the results back. 
> 
> I'll have another HP Digital Sender (auto feed pdf scanner) on 
> line within the month... then you'll have more information to 
> chew over. 
> 
> cheers, 
> s. 
> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.425 / Virus Database: 270.14.61/2498 - Release 
> Date: 11/15/09 07:50:00
> 
> 
> 

RE: [Repeater-Builder] TXRX Vari-NotchR coupling loops

[Jeff DePolo]

> Has anyone got the dimensions of these for a 4" cavity for 
> 450 ish, they are the ones with 2 BNC sockets and a capacitor...Thanks
> 
> Andy
> 
> G8VLL

I'll take one apart if nobody else responds.  I have both the "ham band"
28-66-02 duplexers (100 dB isolation, 0.6 dB loss, 5 MHz split) and also the
same thing in 450-470 MHz (28-70-02) - I don't think the loops are different
between the two, just harness cable lengths.  I think I also have a
28-70-09, which has slightly different loops which yield higher loss (1.2
dB) but deeper notches and more mid-band rejection.

--- Jeff WN3A

RE: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[Mark]

Tim,

 

Or if you can find a Radio Shack that carries anything other than cell
phones, you may find them there as well.  That's' where I got my last few
sets.

 

Mark - N9WYS

 

From: Repeater-Builder@yahoogroups.com  On Behalf Of Steve Gebhard



Find a local trailer supply store, those pigtails are very common wiring
plugs for trailers.

 

  _  

From: Repeater-Builder@yahoogroups.com  On Behalf Of tahrens301

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar. I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know. I need about
20 of them.

Thanks,

Tim

Re: [Repeater-Builder] Re: Micor repeater audio

[Kevin Custer]

mzfb2001 wrote:
> Kevin
>   Thanks for the repleis. In referance to the channel element, is there a way 
> to sweep the element by it self, or is that something that ICM or someone 
> like that would have to do?

You can inject audio from a audio generator directly into the modulation 
pin of the element - past the audio processing.  The spot where the PL 
is injected is a good place.

You can use a scope to insure that the modulation voltage is consistent 
with frequency.  I like to test at several frequencies and at different 
deviation levels.


>  You've hit on something I hadn't thought about. If this could be done by 
> it's self it would be better than having other items in the circuit that 
> would contribute to the problem. Also in support of this idea of the channel 
> causing the problem I've switched exciters but not the channel element. I 
> wouldn't be apposed to having ICM crystal up a new channel element but I want 
> to make it's the problem first and then I'd want to make sure the new element 
> wouldn't have the same problem.

This isn't usually a problem on UHF because of the whole tripling of the 
RF. (The vhf exciter only needs to deviate a distortion-less signal to 
1/3 your maximum deviation amount on UHF (which is likely 5 kHz)), so 
you really only need to rubber the VHF output to 1.67 kHz deviation.  
Since the VHF signal is multiplied 12 times, the crystal itself only 
needs to deviate about 139 cycles on either side of center frequency to 
result in 5 kilohertz deviation on UHF.

That said, I've seen it not be right. 

Someone else mentioned the possibility of audio coupling capacitors that 
have aged and lost capacity; and possibly have become leaky.  This will 
result in off-bias and lack of quality coupling between stages and cards.

Kevin Custer

RE: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[Steve Gebhard]

Find a local trailer supply store, those pigtails are very common wiring
plugs for trailers.

 

  _  

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Sunday, November 15, 2009 4:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

 

  

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar. I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know. I need about
20 of them.

Thanks,

Tim

[Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...

[tahrens301]

Hi Folks,

I'm looking for some power connectors for the above types
of radios.

I don't need much more than pigtails, as I am doing a special
cabling project.

I've looked at both Mouser & Digikey, but they don't seem to 
carry anything similar.  I have seen 'generic' types before...
somewhere!

If anybody has some ideas, please let me know.  I need about
20 of them.

Thanks,

Tim

[Repeater-Builder] Maxon smp4000 password

[kerinvale]

Hi guys .I found the password 317537.It was in the smp4000 programming
manual
 
 
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
 

Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[Chuck Kelsey]

I was hoping that Burt would chime in.

Chuck
WB2EDV



- Original Message - 
From: "Burt Lang" 
To: 
Sent: Sunday, November 15, 2009 11:57 AM
Subject: Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)


> The low-band loop from Sinclair (SRL 110) was not nearly as wide band as
> the Hi band (SRL210) and UHF models (SRL310).  The latter were designed
> to be mounted either half wave or quarter wave from the tower or mast.
> In the case of the low band loop a half wave would have put the loop 10
> ft from the mast, which would be structually unsound.  The SRL110 were
> normally mounted about 3 ft or so from the mast which is 1/8 wave.  This
> would result in a lower impedance (<200 ohms loop impedance)  requiring
> 93 ohm coax as an internal matching transformer (the SRL210 and 310
> series use 125 ohm matching coax).  It also would be much more sensitive
> to spacing from the mast or tower.
>
> At least that has been my experience with the low band loops.
>
> Burt  VE2BMQ
>

Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[Burt Lang]

The low-band loop from Sinclair (SRL 110) was not nearly as wide band as 
the Hi band (SRL210) and UHF models (SRL310).  The latter were designed 
to be mounted either half wave or quarter wave from the tower or mast. 
In the case of the low band loop a half wave would have put the loop 10 
ft from the mast, which would be structually unsound.  The SRL110 were 
normally mounted about 3 ft or so from the mast which is 1/8 wave.  This 
would result in a lower impedance (<200 ohms loop impedance)  requiring 
93 ohm coax as an internal matching transformer (the SRL210 and 310 
series use 125 ohm matching coax).  It also would be much more sensitive 
to spacing from the mast or tower.

At least that has been my experience with the low band loops.

Burt  VE2BMQ

Chuck Kelsey wrote:
> FYI - Sinclair got the extra bandwidth by stager tuning the antenna element 
> from the 1/4-wave matching transformer that is inside the element. The 
> trade-off was a decrease in return loss (higher VSWR).
> 
> Chuck
> WB2EDV
> 
> 
> 
> 
> - Original Message - 
> From: "skipp025" 
> To: 
> Sent: Sunday, November 15, 2009 10:15 AM
> Subject: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)
> 
> 
>> If you're building a Low-Band Loop Antenna from scratch...
>> forget the DB-212 and copy the Sinclair Version. The
>> Sinclair Low-Band loop has a lot wider band-width and it's
>> pretty much the same design... if properly done easier to
>> construct hardware wise.
>>
>> s.
>>
>>
>>> "cruizzer77"  wrote:
>>>
>>>
>>>
>>> Thanks for the info. Somewhere else I read that from the mount to the 
>>> outer edge the length should be 51 inches, this will be about the same as 
>>> 52.5 inches from center to outer edge.
>>>
>>> But to build one from scratch I need more info, radius of the loop, 
>>> diameter of the tube, coupling etc. Of course these can be calculated 
>>> from formulas, but as the DB212 seems to be a particular good design it 
>>> would be interesting to know.
>>>
>>>
>>>
>>>
>>>
>>> --- In Repeater-Builder@yahoogroups.com, "JOHN MACKEY"  wrote:
 I converted one about 15 years ago for use on 6 meters.  It measured 
 52.5
 inches from center to outer edge.

 -- Original Message --
 Received: Sat, 14 Nov 2009 10:41:05 AM PST
 From: "cruizzer77" 
 To: Repeater-Builder@yahoogroups.com
 Subject: [Repeater-Builder] DB-212 detailed info wanted

> Does anyone have detailed info about the DB-212 antenna (converted to 
> 6m)
 that make it possible to build one from scratch?
> All the measures and info about the mount and feed point are 
> interesting in
 the first place.
> 73 de Martin HB9TZW
>
>
>
>
>>
>>
>>
>> 
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
> 
> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.707 / Virus Database: 270.14.66/2504 - Release Date: 11/15/09 
> 02:50:00
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 

Re: [Repeater-Builder] Re: Early FM Repeaters (tubes and more)

[Kris Kirby]

On Sat, 14 Nov 2009, JOHN MACKEY wrote:
> No, I do not have to pay the electric bill.
> 
> I only have to replace tubes about every 5-8 years.

It would be easy to build a step-start for the tube cathode and tie that 
into the COS/PTT line.

You could keep the tube filament warm with 1V or so and jump up to full 
voltage when a signal is present, and hold it for some period of time 
after.

The laser printer in my office does exactly that with the fuser. 

--
Kris Kirby, KE4AHR
Disinformation Analyst

Re: [Repeater-Builder] Re: PD-522-509 Phelps Dodge / Celwave Duplexer Harness Cable Lengths

[no6b]

At 11/15/2009 01:26, you wrote:


>I'm still looking for an answer to the original post, but I tuned it up 
>as-is and ended up with the following result (5 MHz split):
>
>insertion loss = 0.5 dB (RX and TX)
>RX isolation @ TX freq = 93 dB
>TX noise suppression @ RX freq = 55 dB
>
>Something doesn't seem right about that 55 dB figure, especially with > 90 
>dB  RX isolation.  Seeking input and/or original specifications (there are 
>none in the manual).

 From the middle of 
:

"PD-522-509
Does anyone have the spec sheet, the tuning instructions or can supply a 
couple of photos?
This is a popular 6-cavity UHF duplexer that is built as a 4+2 unit (i.e. 
four cavities on one side and two on the other. If you set it on the table 
so that the single coax connector is on the left, and the two are on the 
right, the layout is in the sequence of: 
TXnotch--cable--RXpass--cable--RXpass--cable--TXnotch--cable--RXnotch--cable--TXpass,
 
with the first 4 cavities on the receive side and the last two on the 
transmit side."

You're getting the correct amount of isolation.  I believe it was made in a 
time when only tube equipment was available, & the narrow tuning of those 
radios meant less TX phase noise 5 MHz away, hence less TX noise 
suppression was required.

I once tuned one up for a friend & had the same issue.  I happened to have 
a pass-notch cavity from a T1504 lying around that had the notch on the 
same side as the TX side of the 522-509.  So I made a cable of the right 
length (1/2 wavelength?) to connect that cavity to the TX port.  After 
tuning I got ~90 dB on both TX & RX.

If you don't have a pass-notch can available, you might get enough 
isolation by adding a pure pass can to the TX port.

Bob NO6B

Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[Chuck Kelsey]

I've seen some return loss figures in the 30-40 dB range on the Decibel 
antenna. However, sweep one and report back.

Chuck
WB2EDV


- Original Message - 
From: "skipp025" 
To: 
Sent: Sunday, November 15, 2009 10:57 AM
Subject: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)


>
>> "Chuck Kelsey"  wrote:
>> FYI - Sinclair got the extra bandwidth by stager tuning
>> the antenna element from the 1/4-wave matching transformer
>> that is inside the element. The trade-off was a decrease
>> in return loss (higher VSWR).
>> Chuck
>> WB2EDV
>
> Maybe... maybe not.  I swept one just a short time back and
> the return loss was about 15.6 dB, which makes it a very nice
> usable animal.
>
> I've also had one in parts and the matching coax length was
> what I would have expected. Somewhere in my notes I have all
> the construction information recorded like I did on the Decibel
> Antennas...
>
> I've got a Decibel Loop at the old shop somewhere... if I can
> easily get it up high enough to throw a sweep on it I can
> report the results back.
>
> I'll have another HP Digital Sender (auto feed pdf scanner) on
> line within the month... then you'll have more information to
> chew over.
>
> cheers,
> s.

[Repeater-Builder] TXRX Vari-Notch® coupling loops

[Andy K]

Has anyone got the dimensions of these for a 4" cavity for 450 ish, they are 
the ones with 2 BNC sockets and a capacitor...Thanks

Andy

G8VLL

[Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[skipp025]

> "Chuck Kelsey"  wrote:
> FYI - Sinclair got the extra bandwidth by stager tuning 
> the antenna element from the 1/4-wave matching transformer 
> that is inside the element. The trade-off was a decrease 
> in return loss (higher VSWR).
> Chuck
> WB2EDV

Maybe... maybe not.  I swept one just a short time back and 
the return loss was about 15.6 dB, which makes it a very nice 
usable animal. 

I've also had one in parts and the matching coax length was 
what I would have expected. Somewhere in my notes I have all 
the construction information recorded like I did on the Decibel 
Antennas...

I've got a Decibel Loop at the old shop somewhere... if I can 
easily get it up high enough to throw a sweep on it I can 
report the results back. 

I'll have another HP Digital Sender (auto feed pdf scanner) on 
line within the month... then you'll have more information to 
chew over. 

cheers, 
s. 

 

Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[Chuck Kelsey]

FYI - Sinclair got the extra bandwidth by stager tuning the antenna element 
from the 1/4-wave matching transformer that is inside the element. The 
trade-off was a decrease in return loss (higher VSWR).

Chuck
WB2EDV




- Original Message - 
From: "skipp025" 
To: 
Sent: Sunday, November 15, 2009 10:15 AM
Subject: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)


> If you're building a Low-Band Loop Antenna from scratch...
> forget the DB-212 and copy the Sinclair Version. The
> Sinclair Low-Band loop has a lot wider band-width and it's
> pretty much the same design... if properly done easier to
> construct hardware wise.
>
> s.
>
>
>> "cruizzer77"  wrote:
>>
>>
>>
>> Thanks for the info. Somewhere else I read that from the mount to the 
>> outer edge the length should be 51 inches, this will be about the same as 
>> 52.5 inches from center to outer edge.
>>
>> But to build one from scratch I need more info, radius of the loop, 
>> diameter of the tube, coupling etc. Of course these can be calculated 
>> from formulas, but as the DB212 seems to be a particular good design it 
>> would be interesting to know.
>>
>>
>>
>>
>>
>> --- In Repeater-Builder@yahoogroups.com, "JOHN MACKEY"  wrote:
>> >
>> > I converted one about 15 years ago for use on 6 meters.  It measured 
>> > 52.5
>> > inches from center to outer edge.
>> >
>> > -- Original Message --
>> > Received: Sat, 14 Nov 2009 10:41:05 AM PST
>> > From: "cruizzer77" 
>> > To: Repeater-Builder@yahoogroups.com
>> > Subject: [Repeater-Builder] DB-212 detailed info wanted
>> >
>> > > Does anyone have detailed info about the DB-212 antenna (converted to 
>> > > 6m)
>> > that make it possible to build one from scratch?
>> > >
>> > > All the measures and info about the mount and feed point are 
>> > > interesting in
>> > the first place.
>> > >
>> > > 73 de Martin HB9TZW
>> > >
>> > >
>> > >
>> > >
>> >
>>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>






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02:50:00

[Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)

[skipp025]

If you're building a Low-Band Loop Antenna from scratch... 
forget the DB-212 and copy the Sinclair Version. The 
Sinclair Low-Band loop has a lot wider band-width and it's 
pretty much the same design... if properly done easier to 
construct hardware wise. 

s. 


> "cruizzer77"  wrote:
>
> 
> 
> Thanks for the info. Somewhere else I read that from the mount to the outer 
> edge the length should be 51 inches, this will be about the same as 52.5 
> inches from center to outer edge.
> 
> But to build one from scratch I need more info, radius of the loop, diameter 
> of the tube, coupling etc. Of course these can be calculated from formulas, 
> but as the DB212 seems to be a particular good design it would be interesting 
> to know.
> 
> 
> 
> 
> 
> --- In Repeater-Builder@yahoogroups.com, "JOHN MACKEY"  wrote:
> >
> > I converted one about 15 years ago for use on 6 meters.  It measured 52.5
> > inches from center to outer edge.
> > 
> > -- Original Message --
> > Received: Sat, 14 Nov 2009 10:41:05 AM PST
> > From: "cruizzer77" 
> > To: Repeater-Builder@yahoogroups.com
> > Subject: [Repeater-Builder] DB-212 detailed info wanted
> > 
> > > Does anyone have detailed info about the DB-212 antenna (converted to 6m)
> > that make it possible to build one from scratch?
> > > 
> > > All the measures and info about the mount and feed point are interesting 
> > > in
> > the first place.
> > > 
> > > 73 de Martin HB9TZW
> > > 
> > > 
> > > 
> > >
> >
>

Re: [Repeater-Builder] Re: ACSSB

[Chuck Kelsey]

Are you set up not to receive emails from the Repeater-Builder group? In 
other words, do you go to the web to view all the messages? If you get 
emails, you need only reply using your regular email program.

You can send an email to the group at Repeater-Builder@yahoogroups.com if 
you are set up for "no email" from the group.

Chuck

- Original Message - 
From: "wb6dgn" 
To: 
Sent: Saturday, November 14, 2009 11:19 PM
Subject: [Repeater-Builder] Re: ACSSB


>
> Chuck,
> THANK YOU.  That clarifies that.  Now, the stupid part.  Where do I send 
> the email from my email client.  I've never done that before.
> TA

[Repeater-Builder] Re: Micor repeater audio

[mzfb2001]

Kevin
  Thanks for the repleis. In referance to the channel element, is there a way 
to sweep the element by it self, or is that something that ICM or someone like 
that would have to do? You've hit on something I hadn't thought about. If this 
could be done by it's self it would be better than having other items in the 
circuit that would contribute to the problem. Also in support of this idea of 
the channel causing the problem I've switched exciters but not the channel 
element. I wouldn't be apposed to having ICM crystal up a new channel element 
but I want to make it's the problem first and then I'd want to make sure the 
new element wouldn't have the same problem.
Thanks
Mike

--- In Repeater-Builder@yahoogroups.com, Kevin Custer  wrote:
>
> mzfb2001 wrote:
> > I was looking in the files section and may have missed it, but I am looking 
> > to improve the transmit audio quality on my UHF transmiter. I've noticed 
> > that the audio is lacking in lows its not tinny but its not what I would 
> > call normal audio from a Micor. The audio levels and on frequency 
> > adjustments have made and to seem to be on the money. This is an unmodified 
> > repeater station using stock cards and no controller. The receiver is stock 
> > and the frequency has been changed to the 440mhz band. The audio coming out 
> > of the receiver has fine audio quality.
> > Just looking for your thoughts or ideas.
> > Thanks for your input
> > Mike
> 
> I'd make sure the channel element is not limiting the quality of your 
> audio.  Consider doing a sweep of the frequency response at several 
> deviation levels and see what you have.  I've seen re-crystaled elements 
> that were less than good. 
> 
> Kevin
>

[Repeater-Builder] Re: DB-212 detailed info wanted

[cruizzer77]

Thanks for the info. Somewhere else I read that from the mount to the outer 
edge the length should be 51 inches, this will be about the same as 52.5 inches 
from center to outer edge.

But to build one from scratch I need more info, radius of the loop, diameter of 
the tube, coupling etc. Of course these can be calculated from formulas, but as 
the DB212 seems to be a particular good design it would be interesting to know.





--- In Repeater-Builder@yahoogroups.com, "JOHN MACKEY"  wrote:
>
> I converted one about 15 years ago for use on 6 meters.  It measured 52.5
> inches from center to outer edge.
> 
> -- Original Message --
> Received: Sat, 14 Nov 2009 10:41:05 AM PST
> From: "cruizzer77" 
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] DB-212 detailed info wanted
> 
> > Does anyone have detailed info about the DB-212 antenna (converted to 6m)
> that make it possible to build one from scratch?
> > 
> > All the measures and info about the mount and feed point are interesting in
> the first place.
> > 
> > 73 de Martin HB9TZW
> > 
> > 
> > 
> >
>

[Repeater-Builder] Re: PD-522-509 Phelps Dodge / Celwave Duplexer Harness Cable Lengths

[cracked]

I'm still looking for an answer to the original post, but I tuned it up
as-is and ended up with the following result (5 MHz split):

insertion loss = 0.5 dB (RX and TX)
RX isolation @ TX freq = 93 dB
TX noise suppression @ RX freq = 55 dB

Something doesn't seem right about that 55 dB figure, especially with >
90 dB  RX isolation.  Seeking input and/or original specifications
(there are none in the manual).