[RVRC] W2QW Repeater Updates

[ELDRED MOORE]

A special thanks to all the club members who helped make the recent work 
party a success with a special thanks to Bryan, WB0YLE and Cully, N3HTZ 
for coming the distance with the right tools and knowledge to 
troubleshoot the cause of the desensing. The repeater is now performing 
wonderfully at the expected levels.


73 Drew


On Sun, Jul 21, 2013 at 01:36 AM, cwsaums at aol.com wrote:

> Here is some additional information to follow up the earlier note from 
> Pete
> We had feed line sweeps and other work done at the repeater site on 
> Saturday.  The tests showed a pretty bad fault on the 440 feedline. 
> The 440 repeater was shut down to protect the machine.  We are 
> probably lucky that it wasn't damaged by continuing to use it after 
> the storm.  The backup 2 meter antenna is also out of service although 
> the feed line to the lower mount point on the tower is actually in 
> very good shape. The issue is the antenna not the feedline.
>
> There is a clean unused feed line on the tower that will be used for 
> the new 440 antenna when the remaining climb can be arranged.  The new 
> 2 meter antenna and feedline tested very well with almost totally flat 
> response.
>
> WB0YLE Bryan and his friend Cully from Penn Wireless spent about 3 
> hours (plus 2 hours round trip drive time) doing these line tests and 
> adjusting the notch filters on the 2 meter duplexer to finally resolve 
> the de-sense issue on the 2 meter system.  This allowed the 2 meter 
> amp to go back online and we are back to full power @ approximately 
> 100 watts out.  Cully also checked the new 440 duplexer and it was on 
> spec so no additional adjustments were needed.
>
> The starting point for the 2 meter duplexer was about -75 db isolation 
> between the receive and transmit frequencies.  When the amp was turned 
> on the receive side of the duplexer was getting swamped by the 100 
> watt signal on the transmitter side with insufficient "notch".   After 
> adjustments and a minor repair to one of the notch units, Cully was 
> able to get approx. -120 db of isolation.  At 100 watts, this is 
> sufficient and so far the signal is very clean and strong.
>
> These adjustments were the secret sauce to getting us back to full 
> power.  We owe a big "Thank you" to Bryan and Cully for getting this 
> done for the club.
>
> Thanks to Pete KD2ARB and Bruce KC2YSF for assisting with testing from 
> various locations.  Thanks also to Paul KC2VRJ for spending all the 
> time and getting all the pieces connected again after the adjustments.
>
> 73
> Craig AC2FE
>
> Sent from my iPad
>
> On Jul 20, 2013, at 7:02 PM, Pete Fierro  wrote:
>
>         Hello All
>
>          The 440 repeater is off the air until the climb.The 2 meter 
> repeater duplexers have been fixed&now up to 100 watts out.Sounds 
> good&signal is much cleaner too.
> 
> 73
> 
> Pete
> 
> KD2ARB
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