Steve Kavanagh wrote:

Has anyone else experienced this (i.e. is it normal ?)
or should I be looking for problems in or near the K2
T-R switching circuitry  ?

If you really can't hear them on a different receiver, check the bias voltage on the t/r switch. It should be between 90 and 150v. Low voltage here can cause this problem. The t/r switch is used whether or not the KPA100 is activated.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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