Quote:
Originally Posted by jr_tech
Looking reasonable... have you tried another 7N7?
Does the voltage drop across r-99 match r-102 and r-100 match r-103?
C-5 ok?
jr
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Yes, I swapped out V13 and V12 both 7F7 with no joy.
C5 is good. I removed the C5 wire from pin 7 of V13 and gator clipped in a new 10uf 450V cap. No joy. Restored the wire.
Measured the voltage at the junction of R99 and R102 = 400V, the junction of R100 and R103 = 500V. R100 ohmed out to 2M while the others at close to 2.2M.
Voltages at V13 with the tube pulled are pin 3=1120V, pin 6=1020V.
Tried subbing C81 and C80 at the same time, no joy.
Both pin 3 and pin 6 of V13 drop down when the tube starts to conduct.
I ohmed out the vertical transformer and it ohmed out pretty close to specs.
I'm at a loss right now.
I appreciate your help and suggestions.