Jim and others interested,
I previously said that normal voice into the mikes on the headsets I
installed in my new homebuilt wouldn't easily break the squelch of the newly
built RST-442 Intercom I had also installed. Yesterday a friend used his
Sigtronics headset for the flight and the squelch was opened instantly. So
the cause of the problem was the inadequate output of the electret
microphones on the low cost headsets I had installed.
Thanks for a good product.
Leo