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Yeah thanks a ton guys. I am connecting the radio to a damn good outdoor 120' wire antenna plus a good set of radials so that alone may be overloading the AVC.
I guess at this point I will just send the radio back to its home and mount it back in its cabinet. Like you guys suggested and I thought, it will bring out the bass and loudness.
Being on this good of an antenna is probably overkill and more than the original AVC was designed to handle at the time.
With a 30' wire in the house it plays fine, it is just on the real long wire it distorts. All parts check out so that is not the problem.
This is the first antique radio of this age I have worked on so thanks for baring with me.
I am 29 and only have this much " " experience on tube electronics. I have built a few HF RF and AF tube amps but that is the extent of my knowledge.
This has been really fun to work on but I think it is time to give it back and let the owners enjoy it. Had her playing all night with Coast to Coast AM on multiple channels (thanks to syndication lol).
I have my limits, and this pushed it. I have a good part collection but this hit the replacement part limit, especially parts rated 400v DC+. I am damn lucky I had some old spare tubes from an old Philco I got as a kid that was junked.
Going to try and poke around the chassis with some bypass caps and see if that cleans up any residual RF bleed. After a few hours of play there is still RF getting back into the AF, though at almost unaudable levels, it is enough to cause distortion at fuller than loud audio.
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