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Ok I've at least isolated the problem to a specific area. Pin 2 of the 8BQ11 Chroma Amp should be around 200V. I'm reading around 180V between it and ground. Willing to bet that tube is weak. I have a new one on the way to confirm, and short of that I'll check the circuit around it.
The problem must be there, though. Luma video displays with no issues, and I've got audio, so anything up through the 11BT11 has to be fine. If the tube itself isn't the issue I'll see if R84 or R85 have gone bad.
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To keep your tubes running smoothly, make sure to dust underneath the glass as well.
Last edited by Dubis7; 08-04-2022 at 09:23 PM.
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