[ETS/PARC List] ETSNJ Motorola Repeater is better than ever!

[E Drew Moore]

Excellent troubleshooting by the dynamic duo. Thanks for the details and I look forward to the presentation. 

73, Drew, W2OU

*sent from my ,iPhone 7+-forgive typos*

On Jul 11, 2017, at 4:12 PM, "lengriff at optimum.net" <lengriff at optimum.net> wrote:

   We ( Len, WB2HKK, and Rich, KB2LLM ) went to the site today to
investigate the receive problem.



There will be a detailed presentation at the next meeting.



There were 4 separate areas that became the solution:



1] The receive preamp added TOO much receive gain! I had tuned the Maxtrac
for about 1.5uV sensitivity itself.

   The preamp resulted in about .08uV sensitivity. This just caused
excessive de-sense from the transmitter.



2] The BNC cable I had used for the receiver to duplexer connection was a
piece of CR*P!

   I had fabricated a BNC to N cable from RG1428 Teflon cable to replace it
and it was perfect!



3] The duplexer connections to the transmitter were re-routed to move them
away from any receive cables.



4] I touched up the duplexer for better transmit reject on the receive side.



When done, we could turn the transmitter on / off with NO change in receive
signal.



The result is we have HANDHELD coverage almost everywhere!



ENJOY!

Len

WB2HKK
______________________________________________________________
ETSList mailing list
Home: http://mailman.qth.net/mailman/listinfo/etslist
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ETSList at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html