Have you tried seeing what happens when you simulate the same muting in the Rx without the T4x? It might be something in the Rx that does that when it switches.

Your suggestion is certainly possible if the Rx Mute response is slow. It does not do this with a R4any.

Curt
KU8L



On 10/18/2011 2:56 PM, Henry Foglesong wrote:
I am using a T-4XC with a National NC-300 receiver and am using the receiver mute circuit to mute the receiver. This works well except that when I initiate a transmission with any mode, I get a rather sharp and loud thump in the receiver. It almost sounds as if the rf from the transmitter is hitting the receiver slightly before the transmitter relay switches the antenna and mutes the receiver. Is this typical of that kind of setup, and what, if anything, can be done to minimize the effect?


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