[Johnson] Johnson T-R Switch Receiver muting

[Bry Carling]

Maybe they completely mute the receiver and use a transmitter sidetone osc instead?
-- 
Sent from my android "relatively smart" phone. Please excuse my brevity.

_____________________________________________
From: "Harry Vaught, KT4AE" <kt4ae at bellsouth.net>
Sent: Thu May 10 09:23:12 EDT 2012
To: johnson at mailman.qth.net
Subject: [Johnson] Johnson T-R Switch Receiver muting


Has anyone conquered the receiver muting problem with the Johnson T-R 
switch? It was to be used in my Ranger/SX-100 station.

I installed the mod from the March, 2011 ER which provides a reed relay 
for receiver muting when transmitting. Also, the switch grounds the 
receiver antenna connection when in transmit.

What is needed is to disconnect the receiver antenna when transmitting. 
I have always done this with relay based switches I've built. All the 
muting relay does is to turn off external signals. The "sidetone" from 
the switch is still way too powerful. The front end is still overloaded, 
AVC or not, and takes a couple of seconds to recover.

Has anyone found a way to provide useful silencing of the receiver in 
transmit using the Johnson switch? These switches are very popular. If 
there's no solution to the muting problem, how do people live with it?

Regards,

Harry, KT4AE
Watkinsville, Georgia
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