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Old 05-06-2022, 10:02 AM
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Yamamaya42 Yamamaya42 is offline
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Join Date: Nov 2018
Location: Round Rock TX
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Amp still OK, but no radio.

It does get rather toasty!

Even the 5u4gb with just heaters running gets quite hot.
Not sure if the tuner tubes are good or not at this point, but since the main goal was the TV section, not sure if I want to put in all NOS ones just to try to get it up.
I did not have any 6BA6 tubes that it uses 3 of ( AM RF AMP, 1ST & 2ND AM/FM IF AMP), so I stuck in 3 NOS 6AU6 which is said to be a sub, also a NOS 6AL5 ratio det.
Made no diff whatsoever.
The 6SQ7 AM DET AVC 1ST AF AMP is prob OK, cause amp is working fine.

Unknown
12AT7 FM RF AMP/ MIXER
6BE6 FM OSC AM CONV

I'm just going to have to methodically go over every resistor in the radio section this weekend and see what I find before I think of getting any NOS tubes for it.
A quick check showed plate voltages to be a bit high, by about 55v in the radio area, but normal in the amp.
Not sure if this is due to weak/bad tubes or bad resistors or both.
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