[morzh]

Ask her to overpack it.

[HowardWoodard]

Well, with the replacement tuning assembly, I have finally put the unit back together and aligned the dial.  The first station that came in was a local station and the dial was only 5 KHz off -- an easy adjustment.  Btw, the ones that did come in were very clear.

I have started the tuning process with the broadcast band.  I don't have an antenna and even the really local stations don't come in unless I am touching terminal #1 with my finger.  Even with that, it only picks up stations from 1250 KHz and up.  Looking at the audio out with an oscilloscope, the signal simply flat-lines when it gets down to 1250 and stays that way to the bottom of the band -- like it is being muted.  Makes me think of that little custom-made plastic strip that I didn't know where to put back in the tuner.

Trimmers 36A (gang 1 to RF Amp) and 36B (gang 2 to Det-Osc) look like someone thought they were mounting screws and are tightened all the way down.  When I adjusted the other trimmers, they seemed to be working correctly, and it was easy to find the peak.  I'll loosen 36A & B tomorrow and see how it effects things.

Tomorrow I'll start tracing the signal from my signal generator.  I saw a couple of articles/posts/YT vids on tuning.  I expected to hear the output and be able to tune it by sound but that didn't happen.  Also, none of the ones I reviewed said what the two input voltages (when injecting into the Det-Osc control grid and when injecting through the antenna terminal) from the signal generator should be -- my sig-gen can be set from .1V to 3V P-t-P.  So, if someone knows what they should be I'd appreciate hearing.

I'll post back tomorrow with my specific findings/results.

[RodB]

You may have to start further back with your signal injection at the IF signal grid, then tune the second IF transformer. When you're satisfied with that then move the signal generator to the front. Signals around 0.1 - 0.5 volts should make it through.

[HowardWoodard]

Thanks.  I'll try that.