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If you haven't replaced the leaky paper caps in the horizontal circuit, you need to. Same with the vertical. 3.8 kv means it's basically trying to work. But if there's leakage it's messing up the bias on the 6BG6. With so little grid bias the 6BG6 may be pulling a hefty amount of plate current. 110ma according to your voltage reading on pin 3.
Last edited by Kevin Kuehn; 11-16-2025 at 08:30 PM.
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