Stewart-Warner A72T3

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Stewart-Warner A72T3

Radioroslyn
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Posts: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa

#13

07-30-2022, 08:01 AM

>If you don't have an FM generator an AM generator will do in a pinch. Just use an unmodulated 10.7MHz carrier to the FM antenna with a high impedance meter attached to 6AQ6 pin 6 to read a negative voltage. This voltage is the AGC voltage and varies depending on signal strength, which can be changed from the signal generator. If you get the AGC to vary with signal strength from the antenna the FM oscillator is probably not working. Otherwise one of the FM tubes may be bad; it's been my experience the FM RF amplifier. Double check any parts you replaced in the FM section. Do not change any of the settings until after you find and fix the culprit.

What were the results?

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry

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Messages In This Thread

Stewart-Warner A72T3 - by Masonparker - 07-23-2022, 01:32 PM

RE: Stewart-Warner A72T3 - by Paul Philco322 - 07-23-2022, 01:45 PM

RE: Stewart-Warner A72T3 - by David - 07-23-2022, 04:54 PM

RE: Stewart-Warner A72T3 - by RodB - 07-23-2022, 05:30 PM

RE: Stewart-Warner A72T3 - by morzh - 07-23-2022, 07:27 PM

RE: Stewart-Warner A72T3 - by Masonparker - 07-23-2022, 08:33 PM

RE: Stewart-Warner A72T3 - by Radioroslyn - 07-23-2022, 08:56 PM

RE: Stewart-Warner A72T3 - by David - 07-23-2022, 09:17 PM

RE: Stewart-Warner A72T3 - by MrFixr55 - 07-23-2022, 09:22 PM

RE: Stewart-Warner A72T3 - by Masonparker - 07-24-2022, 06:54 AM

RE: Stewart-Warner A72T3 - by morzh - 07-24-2022, 10:19 AM

RE: Stewart-Warner A72T3 - by Masonparker - 07-29-2022, 04:19 PM

RE: Stewart-Warner A72T3 - by Radioroslyn - 07-30-2022, 08:01 AM

RE: Stewart-Warner A72T3 - by Masonparker - 11-29-2022, 10:07 PM

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