Excellent info! Thanks guys. I am
going to go in further with the generator and comm analyzer (borrowing from work) tonight to try and see what the levels are starting at the first amp stage and working my way in. If it comes down to testing every component individually then so be it.
At this point both radios work quite well, save for the squeal on radio B. I am
just a picky SOB and want it to work properly or as best as it can given the age.
I most likely won't mess with the 6146 swap but will study the info just for my own knowledge.
I have browsed Grumpy's forum in the past but didn't find too much on the Tram D201's. I will look again.
I'll be sure to post my findings. More to follow.
BTW, when the "squeal" is occurring, if you try to modulate through the squeal your voice sounds like it has a rumble in it. I am
thinking AC getting in somewhere it shouldn't be but haven't seen any on the O-scope yet.