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Get a neon lamp tester, the simple kind with two leads used to check for presence of AC.
Then hold the lamp part only close to the HV rect tube (3A3?) cap, if you have glow, try the red anode lead to the CRT. If you get glow both places, you have a video (to the CRT guns) issue. If not, go back to the horiz output tube cap, no glow, change both it and the horizontal oscillator.
What is the chassis number a D11?, I probably have a schematic.
As for the radio, I could use half a can of contact cleaner on the pushbuttons and pots. I bet that sounds great.
Good luck, I agree these were better than RCA in those years.
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"When resistors increase in value, they're worthless"
-Dave G
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