[criageek]

Ok, I'm back to the FM oscillator theory.  I removed Z301 and everything looked ok. I disassembled and cleaned all the trimmers and while I was in there I replaced the 300pF mica cap and installed all new wires.  I also replaced C308 and C310 while I was at it.   I reinstalled the IF can and just tacked the wires in place in case I needed to remove it again.  I went through the entire AM and FM IF alignment procedure and it went well.  A couple of the trimmers are at the end of their limits, but I assume that's because I left the wires longer than they should be and there is some stray capacitance.  But everything aligned properly and C301A can be peaked as it should be.

But I still cannot get a signal through the front end.  When I just try to tune from one end to the other on the FM band there is absolutely no indication that the tuning cap is being changed...no change in pitch or volume...no squealing...nothing.

I recently read somewhere that I should be able to inject a signal to simulate the local oscillator.  I haven't been able to find that post again.  How do I go about doing that?  I know it needs to be 9.1mc above (or is it below?) the tuned frequency, but where should I inject it?  How strong does the signal need to be?  Directly injected or through a cap?  If I can tune a station this would tell me that the local oscillator in the radio is not running.

EDIT:  I should add that step 2 of the FM tests I referenced above still fail.  A signal will go through but it's a much lower signal than at step 1.

Thanks for the help!

Rich