[TinCanAlley]

Originally Posted by old_tv_nut

Diodes themselves cannot cause jailbars. Jailbars could be gnerated in a circuit that happens to contain the diodes, but changing the diodes would not fix them.

Are you asking about replacing the caps or the diodes?

1.5 kV diodes can be used in place of 1.4 kV diodes.

1.5 kV caps should not be used in place of 2 kV caps. The rating may or may not be important for steady state operation, plus, it could be specified to tolerate temporary overvoltage due to CRT arcs or some other condition.

Just thought that if the specs of the diode(s) were out, then it might introduce noise in the circuit that appears as bars. Since I have one diode, I thought I'd replace a current one, most likely on the 240V boost, then the other one when I get its replacement.

I remember years ago when I first started looking at the jailbar issue I was told to put a capacitor of the same voltage in parallel with the B+ filter caps to see if it helped. I didn't, but was wondering if the same would apply to the caps across the boost diodes and damper diode. I have some 560pf 2KV caps an was going to see if they worked in place of the 600pf across the damper and boost diodes. But now wondering if I could parallel them to see if it has any affect on the bars. If not, I have one real 600pf 2KV on an NOS flyback that's instructions say if replacing my current unit I'm supposed to remove it. So if I ever need the new flyback, the capacitor isn't needed. But since it's only one, and my set has three, I'd like to use it where it's actually needed.