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Thanks for the replies, kc8adu.

I wish we were in the same city - that'd be handy. I'd definitely buy you a case of beer and or some lunch! Would be cool to learn a thing or two from someone about this stuff too.

The radio looked 100% stock when I got it. I don't think anyone has done any mods/touched it short of replacing a few tubes. And I've studied just about every photo online of an FS-23/3023/2340 and service/owners manuals.

Unless one of the + leads going to one of the terminals on the power supply canister/cap in the back of the radio is an audio line, and I've somehow relocated it to be touching an ac/heater line (had to do a little rearranging, nothing major) to get my replacement caps neatly soldered onto the bottom without being in obviously bad places.

The radio had this exact hum before I event went after the electrolytics. I could have a bad tube, but I guess I won't know for sure until I can test them all 100%. I can buy a bunch of new ones on e-bay and spend 100+$ replacing them all (with shipping) but I still won't know if the ones I got are any good.

I will ask the guy at the electronics shop tomorrow more specifics on the model tube tester than he has can test. Will specifically mention heater-cathode leakage and just look it up myself online if he gives me the model # tester.

<blockquote data-quote="479tx" data-source="post: 335075" data-attributes="member: 22199">Thanks for the replies, kc8adu. I wish we were in the same city - that&#039;d be handy. I&#039;d definitely buy you a case of beer and or some lunch! Would be cool to learn a thing or two from someone about this stuff too. The radio looked 100% stock when I got it. I don&#039;t think anyone has done any mods/touched it short of replacing a few tubes. And I&#039;ve studied just about every photo online of an FS-23/3023/2340 and service/owners manuals. Unless one of the + leads going to one of the terminals on the power supply canister/cap in the back of the radio is an audio line, and I&#039;ve somehow relocated it to be touching an ac/heater line (had to do a little rearranging, nothing major) to get my replacement caps neatly soldered onto the bottom without being in obviously bad places. The radio had this exact hum before I event went after the electrolytics. I could have a bad tube, but I guess I won&#039;t know for sure until I can test them all 100%. I can buy a bunch of new ones on e-bay and spend 100+$ replacing them all (with shipping) but I still won&#039;t know if the ones I got are any good.I will ask the guy at the electronics shop tomorrow more specifics on the model tube tester than he has can test. Will specifically mention heater-cathode leakage and just look it up myself online if he gives me the model # tester.</blockquote>

[QUOTE="479tx, post: 335075, member: 22199"] Thanks for the replies, kc8adu. I wish we were in the same city - that'd be handy. I'd definitely buy you a case of beer and or some lunch! Would be cool to learn a thing or two from someone about this stuff too. The radio looked 100% stock when I got it. I don't think anyone has done any mods/touched it short of replacing a few tubes. And I've studied just about every photo online of an FS-23/3023/2340 and service/owners manuals. Unless one of the + leads going to one of the terminals on the power supply canister/cap in the back of the radio is an audio line, and I've somehow relocated it to be touching an ac/heater line (had to do a little rearranging, nothing major) to get my replacement caps neatly soldered onto the bottom without being in obviously bad places. The radio had this exact hum before I event went after the electrolytics. I could have a bad tube, but I guess I won't know for sure until I can test them all 100%. I can buy a bunch of new ones on e-bay and spend 100+$ replacing them all (with shipping) but I still won't know if the ones I got are any good. I will ask the guy at the electronics shop tomorrow more specifics on the model tube tester than he has can test. Will specifically mention heater-cathode leakage and just look it up myself online if he gives me the model # tester. [/QUOTE]

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