[Nick3092]

OK, I'm completely stumped now.  I cleaned the pot out with a little bit of D5, and some F100.  Tested it with a DMM, the resistance moved smoothly and physically the pot feels incredibly smooth.  Before installing it in the radio, I hooked it up between  the audio output on my sig gen, and my sig tracer.  It controlled the volume perfectly.  Reinstalled it, same behavior out of the radio, low to no volume.  I temporarily put in the new pot again that had worked for me before, and that no longer gives me any volume.


So I hooked up the audio signal coming into the radio's pot, and instead of hooking up the wiper to the audio tube, I connected it to my tracer probe.  It controls the volume perfectly out of the tracer's speaker.  And I can get really good volume out of the tracer too.

Then I did the reverse.  Disconnected the the audio line coming out of the 3rd IF and hooked up my sig gen audio output instead to the radio pot, and hooked the wiper up to the audio tube.  I can control the volume of the audio signal out of my generator quite well our of the radio's speaker with the volume pot.

It seems like independently the RF and audio sections work great.  But as soon as you connect them together, you get nothing.  I've cleared both sections, and cleared the pot it self.  But they just don't want to play nice together.  I just don't get it.