|
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......
__________________
Yes you can call me "Squirrel boy"
Last edited by Username1; 05-28-2021 at 06:40 PM.
|