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#16
05-28-2021, 07:29 PM
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If pin 7 is at -5v as you said early on, then the first video amp
tube v4 is close to cutoff. Cutoff is where the tube does not conduct any current, that would explain the high voltages on the plate & screen grids. I would wonder if the 22ohm resistor in the cathode circuit is open? or there is a bad connection, broken foil etc. Why is -5v on pin 7? bad resistor to ground up stream closer to the detector? For the most part the picture looks good, and you have color, so it's all pretty much working. So it's gotta be a little thing......
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Yes you can call me "Squirrel boy" Last edited by Username1; 05-28-2021 at 07:40 PM. 
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