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Yes, V5a grid (pin2) is looking for a volt of video. Why do you think the schematic is not correct? Did you see that circuit that goes off to the Brightness control? I would investigate that. Check the plate and screen voltages of V5a. Verify the peaking coil is not open. That would screw up the bias on V5a.
Maybe a problem further down the road.
How many tubes are in that set? Looks like a well designed set to me.
I once worked at a radio shop. Did mostly installation into cop cars. At that time, it was Mocom70, Micor, and Maxar radios. Syntors had not yet come along.
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Last edited by kf4rca; 05-26-2026 at 07:36 AM.
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