Re: [Repeater-Builder] Repeater Antenna

2009-05-19 Thread Dr. Ron Johnson
Dean,

Just talked to Wayne, the tech at Diamond.  Turns out that he said static 
buildup can zap the capacitors in the antenna... apparently, that is what has 
happened... Have to return it to them so they can put  heavier duty caps in the 
thing  Up the tower again..

Ron
  - Original Message - 
  From: Dean Nash 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Tuesday, May 19, 2009 12:12 PM
  Subject: Re: [Repeater-Builder] Repeater Antenna






  Ron,

  Have you contacted Diamond's tech support on the 510?  They claim that to 
be the "heavy duty repeater version" and as such should make it good.  I've had 
pretty good luck with thier support systems on another antenna.

  I have ordered a 510 for use on a 440 repeater trailer setup I'm building 
so please let us know what your solution is.  I'm only running 40 watts, but I 
don't want something up there that has a history of failure.
   


  73 de N4SHD






--
  From: rwjohn49 
  To: Repeater-Builder@yahoogroups.com
  Sent: Tuesday, May 19, 2009 11:49:27 AM
  Subject: [Repeater-Builder] Repeater Antenna


  Hey Folks,

  I have two repeaters here on two and 440 Problem is I have to run one 
antenna for both...so, dual band antennas work fine...problem is even the heavy 
duty version (x510) of Diamond and the best Comet have failed... Am running 70 
watts on two and 60 watts on 440 In each case the capacitors fail.am 
tired of climbing up the tower Any ideas on a better dual band that will 
not fail.. Pulling my hair out.

  ron






  


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06:21:00


Re: [Repeater-Builder] Repeater Antenna

2009-05-19 Thread Dr. Ron Johnson
I only have one tower up at present and it serves for hf and I have a yagi on 
topsothe repeater antenna is on a mast above the yagi Back 25 years 
ago, I could climb without too much troublenow that I have gotten into my 
"golden" years, I don't climb so well. Guess the time has come to get some 
young buck to put me up another tower and dedicate it to the repeater 
system.

ron


  - Original Message - 
  From: wd8chl 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Tuesday, May 19, 2009 12:53 PM
  Subject: Re: [Repeater-Builder] Repeater Antenna





  rwjohn49 wrote:
  > Hey Folks,
  > 
  > I have two repeaters here on two and 440 Problem is I have to run
  > one antenna for both...so, dual band antennas work fine...problem is
  > even the heavy duty version (x510) of Diamond and the best Comet have
  > failed... Am running 70 watts on two and 60 watts on 440 In each
  > case the capacitors fail.am tired of climbing up the tower
  > Any ideas on a better dual band that will not fail.. Pulling my hair
  > out.
  > 
  > ron

  What's your reason for the one antenna restriction-or better phrased-can 
  you run 2 feedlines? If so, you can take, say, an 8-bay UHF and mount a 
  4-bay VHF at 90 deg from the UHF elements on the same mast (or a 2-bay 
  VHF on a UHF 4-bay). There's a number of ways to do it and still come 
  out with a more-or-less omni pattern.

  If you need one feedline, TX/RX and a few others do make commercial 
  grade cross band couplers. Put one at the antenna and one at the repeaters.


  


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06:21:00


Re: [Repeater-Builder] Repeater Antenna

2009-05-19 Thread Dr. Ron Johnson
Dean,

I do plan to contact them.Hope they can explain what is going on

Ron
  - Original Message - 
  From: Dean Nash 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Tuesday, May 19, 2009 12:12 PM
  Subject: Re: [Repeater-Builder] Repeater Antenna






  Ron,

  Have you contacted Diamond's tech support on the 510?  They claim that to 
be the "heavy duty repeater version" and as such should make it good.  I've had 
pretty good luck with thier support systems on another antenna.

  I have ordered a 510 for use on a 440 repeater trailer setup I'm building 
so please let us know what your solution is.  I'm only running 40 watts, but I 
don't want something up there that has a history of failure.
   


  73 de N4SHD






--
  From: rwjohn49 
  To: Repeater-Builder@yahoogroups.com
  Sent: Tuesday, May 19, 2009 11:49:27 AM
  Subject: [Repeater-Builder] Repeater Antenna


  Hey Folks,

  I have two repeaters here on two and 440 Problem is I have to run one 
antenna for both...so, dual band antennas work fine...problem is even the heavy 
duty version (x510) of Diamond and the best Comet have failed... Am running 70 
watts on two and 60 watts on 440 In each case the capacitors fail.am 
tired of climbing up the tower Any ideas on a better dual band that will 
not fail.. Pulling my hair out.

  ron






  


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06:21:00


Re: [Repeater-Builder] Iso-coupler

2009-01-28 Thread Dr. Ron Johnson
Thanks for all the help.  The owner of the station and I are aware of what 
needs to be done.  I just needed to know the best place to get a good isolator. 
 

thanks
  - Original Message - 
  From: neal Newman 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, January 28, 2009 7:00 PM
  Subject: Re: [Repeater-Builder] Iso-coupler


 Ok as a broadcast Engineer I can answer this for you.
 Its an AM Tower Yes you need an Isocoupler.. they are not cheap. 
depending on how deep your pockets are. If you want one that wont affect the  
AM stations performance
 go with Kintronic Labs
http://www.kintronic.com/

Iso couplers are custom made for your frequency. they are not stock 
Items.
they will need to know the frequencys, in and out  and that it is a 
repeater.
and the power output.
when dealing with AM broadcast stations   Do not us TX-RX as 
recommended...
go with a company that specalizes in AM broadcast, and Kintronics is 
the Best.

You mount this Isocoupler on the Tower itself or on the ATU box if its 
within a few feet of the Tower If not. that length of cable from the Tower 
to the isocoupler will Be Hot. and Its length can affect the Broadcast stations 
Tuning. even at less than 6 feet. so Be very careful.

 I just delt with an AM station that had an FM translator on it and 
cell  antennas being Installed. without iso couplers... and the owner wondered 
why He had Problems with his station...
If your wondering I  Build,and maintain AM stations for a living

Neal Newman- KA2CAF/ WQEN680

 East Coast Regional Engineer- MRBI
--- On Wed, 1/28/09, Maire-Radios  wrote:

  From: Maire-Radios 
  Subject: Re: [Repeater-Builder] Iso-coupler
  To: Repeater-Builder@yahoogroups.com
  Date: Wednesday, January 28, 2009, 5:59 PM


  TX  RX  as for Bob


- Original Message - 
From: Dr. Ron Johnson 
To: Repeater-Builder@yahoogroups.com 
Sent: Wednesday, January 28, 2009 4:57 PM
Subject: [Repeater-Builder] Iso-coupler


Got and opportunity to locate a repeater on a nice tall 1000 watt 
broadcast tower.I need an iso-coupler.  Where is the best place to order 
one?  Who has the best pricesthese things are not cheap.It will need to 
be cut to freq of course

ron 



   


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7:26 AM


[Repeater-Builder] Iso-coupler

2009-01-28 Thread Dr. Ron Johnson
Got and opportunity to locate a repeater on a nice tall 1000 watt broadcast 
tower.I need an iso-coupler.  Where is the best place to order one?  Who 
has the best pricesthese things are not cheap.It will need to be cut to 
freq of course

ron

Re: [Repeater-Builder] Re: Triplexer noise

2008-09-27 Thread Dr. Ron Johnson
No pigtails..thanks for all the suggestions.will try another one...

ron
  - Original Message - 
  From: [EMAIL PROTECTED] 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Saturday, September 27, 2008 12:23 AM
  Subject: Re: [Repeater-Builder] Re: Triplexer noise


  At 9/26/2008 12:41, you wrote:
  >I didn't see anyone mention the coax leads on the triplexer itself.
  >These are probably copper braid and not suitable for duplex service.

  Absolutely. If this is the one with pigtails (CFX-324A, as opposed to 
  CFX-324B), then that is almost certainly the problem.

  Bob NO6B



   


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7:35 AM


Re: [Repeater-Builder] Re: Triplexer noise

2008-09-26 Thread Dr. Ron Johnson
It is the model with connectors on the bodyno pigtails.

rj
  - Original Message - 
  From: Laryn Lohman 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, September 26, 2008 3:41 PM
  Subject: [Repeater-Builder] Re: Triplexer noise


  I didn't see anyone mention the coax leads on the triplexer itself. 
  These are probably copper braid and not suitable for duplex service. 
  I'd replace them with *silver* plated double shield coax or Superflex,
  with properly installed connectors. Or, replace the triplexer with
  one that has connectors on the body. 

  Laryn K8TVZ



   


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Re: [Repeater-Builder] Triplexer noise

2008-09-26 Thread Dr. Ron Johnson
Thanks BobI will try all those.
  - Original Message - 
  From: Bob Donnell 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, September 26, 2008 2:22 PM
  Subject: RE: [Repeater-Builder] Triplexer noise


  Hi Ron,

  You might be dealing with an intermod generation problem in the antenna.
  I'd suggest using a coaxial signal injector, a 60dB coupler or a tee with
  the third port center pin removed - something like that, on the common port
  of the triplexer, or between it and the 2M receiver. Using a signal
  generator, inject a signal at a level that causes the desense to occur -
  with all the other required conditions, like the other transmitter(s) being
  up. That might be most easily done with more injectors, one for each other
  repeater input, and signal sources that'll keep the other repeaters keyed
  up. Perform the desense test with the antenna connected, and with a good
  quality dummy load, that's rated to handle the total power you're putting
  out of all of the repeaters. 

  If the desense isn't present, then something in the antenna or on the tower
  may be creating the problem signal/noise, and may not be solvable with your
  current configuration, or even on that site.

  If the desense problem is still present, then the suggestion about using
  cavities can be pursued with the knowledge that the problem isn't due to the
  antenna. One suggestion would be to use a notch cavity tuned for the
  2-meter receive frequency, in the transmit path of the repeater
  transmitter(s) that are involved with the interference. The other would be
  to try high-pass or band-pass filters in those same transmitter paths.
  Those could be cavities, or parts of additional diplexers or triplexers, at
  least as a test, to identify the culprit. Using the notch cavity will knock
  down broadband noise from the culprit transmitter on the 2-meter reciever
  frequency, preventing it from getting to the triplexer in the first place.
  The band- or high-pass filters will do the same, especially if they have
  good rejection at 2 meters. The notch cavity solution may have less loss.
  Recall too that a 2-meter cavity will also produce a notch or passband
  response at 440 MHz, due to the resonant element being a 3/4 wavelength.
  The coupling loops will be wrong, but the supression achieved will usually
  be quite small - not what you're trying to achieve. If a 2-meter cavity is
  used in the 440 path, it could really screw things up on the 440 repeater.

  Hope that helps!

  73, Bob, KD7NM

  

  From: Repeater-Builder@yahoogroups.com
  [mailto:[EMAIL PROTECTED] On Behalf Of Dr. Ron Johnson
  Sent: Friday, September 26, 2008 10:15 AM
  To: Repeater-Builder@yahoogroups.com
  Subject: [Repeater-Builder] Triplexer noise

  We are using a comet 324 triplexer here for 2m, 220, and 440. Working with
  a triband antenna. Only problem is desense on 2m through the
  triplexerany ideas other than throwing the thing awayThe desense is
  present at very low levels of signal...at about .2mv but will cycle the
  repeater. Makes it hard for portables getting in. The triplexer is
  grounded, all connections are fine. Have been chasing this for some time
  now...I opened it up and even touched up the solder
  jointsnothingstill desense... Maybe somebody out there has had the
  same problem and has beaten it

  thanks, ron




   


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7:35 AM


Re: [Repeater-Builder] Triplexer noise

2008-09-26 Thread Dr. Ron Johnson
Thanks for all the good suggestions.   I am using hardline jumpers from the 
duplexer to the triplexer and then a double shielded silver plated jumper over 
to the 7/8 inch cable to the antenna.  All connectors are factory spec, silver 
plated...no junk and no homemade connectors.  The 2m, 220, and 440 machines are 
super clean on the spectrum analyzer.  I am beginning to think that the "cheap" 
triplexer is the problem in and of itself.  It is a 600 watt model,  Comet 
cfx-324.   By the way, the repeaters are:  MSR 2000 on 2m,  RCA Series 500 on 
440, and Maggiore on 220.  Duplexers are:  Sinclair, Motorola and Wacom.  To 
answer the other emails:  The noise is not out of band.  I have not placed a 
filter between the 2m and the triplexerwill do that... and I have tried it 
on other antennasdoes the same thing.   I think that is all for now


ron
  - Original Message - 
  From: Ken Arck 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Friday, September 26, 2008 1:59 PM
  Subject: Re: [Repeater-Builder] Triplexer noise


  At 10:14 AM 9/26/2008, Dr. Ron Johnson wrote:



We are using a comet 324 triplexer here for 2m, 220, and 440.  Working with 
a triband antenna.  Only problem is desense on 2m through the triplexerany 
ideas other than throwing the thing awayThe desense is present at very low 
levels of signal...at about .2mv but will cycle the repeater.  Makes it hard 
for portables getting in.  The triplexer is grounded, all connections are fine. 
 Have been chasing this for some time now...I opened it up and even touched up 
the solder jointsnothingstill desense...  Maybe somebody out there has 
had the same problem and has beaten it
 

  <---I have seen this phenomenon before. Assuming your 220 and UHF xmtrs are 
clean, check any adapters you may have in the lines especially the output of 
the triplexer. 

  The cheaper adapters can create all sorts for mix products when multiple 
sources of RF are present.

  Ken



  --
  President and CTO - Arcom Communications
  Makers of repeater controllers and accessories.
  http://www.arcomcontrollers.com/
  Authorized Dealers for Kenwood and Telewave and
  we offer complete repeater packages!
  AH6LE/R - IRLP Node 3000
  http://www.irlp.net 
  "We don't just make 'em. We use 'em!"

   


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7:35 AM


[Repeater-Builder] Triplexer noise

2008-09-26 Thread Dr. Ron Johnson
We are using a comet 324 triplexer here for 2m, 220, and 440.  Working with a 
triband antenna.  Only problem is desense on 2m through the triplexerany 
ideas other than throwing the thing awayThe desense is present at very low 
levels of signal...at about .2mv but will cycle the repeater.  Makes it hard 
for portables getting in.  The triplexer is grounded, all connections are fine. 
 Have been chasing this for some time now...I opened it up and even touched up 
the solder jointsnothingstill desense...  Maybe somebody out there has 
had the same problem and has beaten it

thanks, ron

[Repeater-Builder] Motorola S-1063B

2007-03-03 Thread Dr. Ron Johnson
Picked up a Motorola S-1063B at Dalton hamfest Does anyone have a book or 
schematic on it.  Has a plug on the back for power but must require a plug with 
the transformer in it...  Don't know the voltage.

Thanks

Ron

[Repeater-Builder] Problems with RC210 and Echolink

2006-05-30 Thread Dr. Ron Johnson





Folks,
 
Ken and I have been chatting about my 
problem.  I have a VA3TO (DRF Technologies) Echolink Interface.  It is 
configured to port 3 on the RC210.  PTT and COS lines are crossed as well 
as the audio.  The macro is set to link port 3 to port 1 and to unlink it 
when I don't want Echolink working.  The PTT light on Port 3 stays on all 
the time...  Plus, the controller loses its mind when I engage the 
macro  I can disconnect the ptt and cos lines, then the light goes out, 
but the controller still won't work right when I engage the macro.not until 
I disconnect the audio line going into the VA3TO box  Plus, the 
controller comes unlocked.  I have to hit # and relock the controller and 
then all is well.Any ideas?  Any of you using this 
combination?
 
Thanks,
 
Ron













  




  
  
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Re: [Repeater-Builder] GLB Synthesizer

2006-02-17 Thread Dr. Ron Johnson
Thanks Mike.  That helps.

Ron
- Original Message - 
From: "Mike Morris" <[EMAIL PROTECTED]>
To: 
Sent: Friday, February 17, 2006 4:15 PM
Subject: Re: [Repeater-Builder] GLB Synthesizer


> At 06:09 AM 2/17/06, you wrote:
>
>>I suppose I should brave the cold and go out to the garage and dig out
>>the GLB 300 I have...it was set up for an MHT series Motrac. I ran it
>>for years on a Motran. I don't remember if the I.F. in the H series rx
>>was the same...8Mhz...
>>I think I have the book too...
>
> HHT early series was 12mhz, around the C or D version they went to 8.6MHz
> Last version was the E series.
> LHT and MHT series was all 8.6Mhz
>
> Pissed me off to, as I had multifreq'd a 30w 2 channel HHT series and had 
> 5
> channels in it.
> Then I was handed a 110w PL stretch-case 8 freq SP MHT and had to re-order
> all the receive rocks.
>
> Mike WA6ILQ
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
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[Repeater-Builder] GLB Synthesizer

2006-02-16 Thread Dr. Ron Johnson





Folks,
 
I wonder if anyone out there has any information on 
the offset crystal needed for a GLB synthesizer.  I am trying to interface 
an old GLB to my old Motorola Motrac (U63HHT).  Its an old 
boatanchor.  Trying to replicate my early days on 2 meters when I ran this 
setup.  But I have lost all my documentation.  Any help would be 
appreciated.
 
Thanks,
 
Ron WB4GWA













  




  
  
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Re: [Repeater-Builder] Need a schematic

2005-04-12 Thread Dr. Ron Johnson





Thanks a bunch.

  - Original Message - 
  From: 
  Mark 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Tuesday, April 12, 2005 10:17 
  PM
  Subject: Re: [Repeater-Builder] Need a 
  schematic
  
  I'll send you a scan in the morning.  finals 
  are mrf648's, driver is a mrf646
  
- Original Message - 
From: 
    Dr. Ron 
    Johnson 
To: Repeater-Builder@yahoogroups.com 

Sent: Tuesday, April 12, 2005 9:34 
PM
Subject: [Repeater-Builder] Need a 
schematic

Folks,  Does anyone have a schematic for a 
Trilectric A-25100UR?   I think I have a blown transistor...or 
two.
 
Thanks
Ron



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[Repeater-Builder] Need a schematic

2005-04-12 Thread Dr. Ron Johnson





Folks,  Does anyone have a schematic for a 
Trilectric A-25100UR?   I think I have a blown transistor...or 
two.
 
Thanks
Ron













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Re: [Repeater-Builder] Need a duplexer

2005-04-10 Thread Dr. Ron Johnson





Thanks.  I just lost a bid tonight on an ebay 
Q202.   My luck.Thanks for the info on the mobiles..I thought 
so.

  - Original Message - 
  From: 
  John J. 
  Riddell 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Sunday, April 10, 2005 10:00 
  PM
  Subject: Re: [Repeater-Builder] Need a 
  duplexer
  
  Ron,  go to QTH.com ...or was it 
  Ebay...?there is a Sinclair Q202 for salea very good 
  duplexer
  Mobile units are usually 5 Mhz split...and of no 
  value for 144 Mhz
   
  73 John VE3AMZ
  
- Original Message - 
From: 
Dr. Ron 
Johnson 
To: Repeater-Builder@yahoogroups.com 

Sent: Sunday, April 10, 2005 9:49 
PM
Subject: [Repeater-Builder] Need a 
duplexer

We just got approved for a repeater on 2 
meters.  I need a duplexer.  Anybody got one laying around?  
Also,  what do you all think about the mobile duplexers and low power 
duplexers from Sinclair on ebay?  I used to use a Wacom years 
ago.  Gave the repeater to the club and moved to 450 but now am going 
to add this new 2 meter machine for our little county which currently has no 
2 meter service.  Just wondered what ya'll think
 
Thanks,
 
Ron



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[Repeater-Builder] Need a duplexer

2005-04-10 Thread Dr. Ron Johnson





We just got approved for a repeater on 2 
meters.  I need a duplexer.  Anybody got one laying around?  
Also,  what do you all think about the mobile duplexers and low power 
duplexers from Sinclair on ebay?  I used to use a Wacom years ago.  
Gave the repeater to the club and moved to 450 but now am going to add this new 
2 meter machine for our little county which currently has no 2 meter 
service.  Just wondered what ya'll think
 
Thanks,
 
Ron













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Re: [Repeater-Builder] Need a schematic

2005-04-10 Thread Dr. Ron Johnson





Thanks so much Mike.

  - Original Message - 
  From: 
  Mike 
  DeWaele 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Sunday, April 10, 2005 6:11 
PM
  Subject: Re: [Repeater-Builder] Need a 
  schematic
  
  Ron,
   
  I have one of those exciters. I believe I have 
  the complete paper work with assembly instructions. I'm going to shack to find 
  it now. I can scan and forward it to you.
   
  Also Kevin mine says T51 engraved on 
  board.
   
  Mike KA2NDW
  
- Original Message - 
From: 
    Dr. Ron 
Johnson 
To: Repeater-Builder@yahoogroups.com 

Sent: Sunday, April 10, 2005 4:46 
PM
Subject: Re: [Repeater-Builder] Need a 
schematic

Thanks Kevin.  Here is a pix.  On the 
opposite side it says Hamtronics T51 Exciter.
 
Ron

  - Original Message - 
  From: 
  Kevin 
  Custer 
  To: Repeater-Builder@yahoogroups.com 
  
  Sent: Sunday, April 10, 2005 10:00 
  AM
  Subject: Re: [Repeater-Builder] Need 
  a schematic
      Dr. Ron Johnson wrote:
  



Folks,
 
I need a schematic for Hamtronics T51 
exciter.  This is the old one, not the TA model.  Uses a sd 
1115-7 in the final.  Any 
  help?Doc,I have seen you post this a 
  few times and am wondering if you really don't have a TA-51?  I say 
  this because I have a TA-51 from the 1980's that uses a SD1115-7 as the 
  final?  Just how old is the unit you have?  Can you send a 
  reasonable sized picture of it here?  I have a full manual I'd offer 
  to scan or copy for you, but we need to know what exactly you have.  
  Kevin CusterList Owner
  
  

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[Repeater-Builder] Need a schematic

2005-04-10 Thread Dr. Ron Johnson





Folks,
 
I need a schematic for Hamtronics T51 
exciter.  This is the old one, not the TA model.  Uses a sd 1115-7 in 
the final.  Any help?
 
73,
 
Ron













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