[klondike98]

Back to the Zenith…  the schematic link is here (ignore the red highlighting).

I did get a signal tracer and here’s what’s going on:

Set signal generator RF at 1050 KC and turned modulation on.
Injected signal at the antenna and tuned the radio to 1050.
I can hear tone at the radio speaker but I have to turn the radio volume to full (this is the same as when I tune to the local AM station, I can hear it but only on full volume).

Signal tracer probe on antenna = I can hear the modulation tone through signal tracer speaker.
Signal tracer probe on grid (pin 6) of 1LN5 R.F. = I can hear the modulation tone.
Signal tracer probe on grid (pin 6) of 1LC6 Converter = slightly louder tone
Signal tracer probe on grid (pin 6) of 1LN5 I.F = louder tone
Signal tracer probe on grid (pin 6) of 1LD5 = very very faint tone
Signal tracer probe on Dp (pin 4) of 1LD5 = very very faint tone

Sounds to me like signal is getting lost in the 2nd IF transformer which is consistent with me not being able to get it to peak when trying to align it.  Or is it possible its a bad 1LD5?  I've switched out 1LN5s with no changes.  Voltages are all good.  So…I’m at the end of my troubleshooting skills.  The coil shows continuity so perhaps one of the caps in it has failed?  Unfortunately there are no values on any of them.  Any suggestions for a next step?  Try to find a replacement 2nd IF transformer.  Thanks for any help on this one!!!