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

[Pete Fierro]

You both Rock Len,Rich!!....Thank You....Kind regards,Pete KD2ARB

On Jul 11, 2017 4:32 PM, "w2wiq1 at juno.com" <w2wiq1 at juno.com> wrote:

>
> HI LEN & RICH:
>
> TNX FOR TAKEING ALL THAT TIME AND EFFORT TO RESOLVE THE DESENSE PROBLEM.
>
> WE HAVE HAD OUR PROBLEMS WITH CABLES IN THE PAST.
> SOME TIMES YOU DO NOT REALIZE HOW CRITICAL THEY ARE IN A REPEATER
> SYSTEM.ALSO IF YOU HAVE GOOD PROPERLY MADE CABLES THEIR LOCATION IN RESPECT
> TO OTHERS SHOULD NOT MAKE A DIFFERECE.IF IT DOES YOU MUST SUSPECT THERE IS
> A PROBLEM WITH ONE OR MORE.
>
> TNX AGAIN FOR ALL YOUR EFFORTS.
>
> BEST 73
>
> WALTER-W2WIQ
>
>
> ---------- Original Message ----------
> From: "lengriff at optimum.net" <lengriff at optimum.net>
> To: <etslist at mailman.qth.net>
> Cc: k2vhw at verizon.net
> Subject: [ETS/PARC List] ETSNJ Motorola Repeater is better than ever!
> Date: Tue, 11 Jul 2017 16:12:46 -0400 (Eastern Daylight Time)
>
>     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
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