[Collins] NEED HELP RE KWM-2 RECEIVE AUDIO DISTORTION ON STRONG SIGNALS

[Park, Ted]

Team

I am restoring a winged emblem  KWM-2 serial number 15613 and I have, =
among other things, checked and replaced tubes, cleaned switch and relay =
contacts,  replaced all the electrolytic capacitors in the KWM-2 and all =
the electrolytic capacitors in the 516F-2 power supply. It now works =
perfectly except for one thing.....in receive on strong signals above S9 =
the audio becomes distorted. On signals less than S9 the receive audio =
is outstanding. If I reduce the RF gain on distorted signals the =
distortion disappears. I have tried replacing V15 and V16 with no change =
and all voltages and resistances measure nominal at the tube sockets in =
accordance with the KWM-2 manual. Other than the receive audio =
distortion on strong signals the KWM-2 now performs perfectly. Audio =
reports on transmit using my Collins SM-2 microphone with the KWM-2 are =
uniformly outstanding (Collins quality). Any suggestions regarding how I =
might solve my receive audio distortion problem would be appreciated. =
Thanks, Ted, K6XN