[Patrick]

OK, here is a silly question.  Troubleshooting for section 2 says to use an audio signal.  Just to be sure, are you using an audio signal or an audio-modulated RF signal?

If you don't get any audio out of test point A, try walking your probe past C207, the volume control, and C210.  At some point you'll get a signal, because you already know you get strong output from the 7C6 grid at point D.  Then you'll have a good idea what was wrong between points A and D.

Ditto if you walk the audio signal from point A up to the IF transformer.  If you are supposed to hear audio injected at point A, then you should hear it if it's injected anywhere along that path.

Is there a particular problem you are trying to solve?  If you hear audio injected at point D, then you know the AF path works from the speaker back to that point regardless of your indication at point B, so I wouldn't sweat that for now.  What do you hear when you turn the radio on and try to get a station, or if you put modulated RF on the grid of the IF tubes?

The original problem was no signal from the IF. So I just thought I'd try the troubleshooting steps, instead of just going to the IF coils. I did find that the volume control pot is flaky. I was able to finally get a good audio signal on the left of R205 (100K), but very weak on the  test point A side. Is a 100K resistor going to reduce the audio that much? Then I discovered that I got no signal from terminal 1 of TB400, so none of the trimmers did anything. I disassembled the 3rd IF can, and found a bad mica cap. So I'm just going to check all three IF cans out, but I had to order more mica caps and fish paper, as the original insulation was stuck like glue to the insides of the can.

So it will be a week or 2 before I attack it again. But I've got a Deforest Crosley 1621, a Midwest 181, a Philco 41-608, a Philco 37-660, and a Philco 38-3-3XX  staring at me waiting for restoration. I'll hit the Deforest Crosley first.