I’m Back! Pilot TV37

[Chris K]

Originally Posted by Electronic M

You can only use ceramics if you double the capacitance, otherwise you'll have incurable non-linearity in the sweep.

I just go on mouser and get Wima brand red rectangular film caps of that voltage and .0047uF/4700pF they work great in various brands of electrostatic sets. I keep a certain number of them in stock so I can buy and start on an electrostatic deflection set any day I feel like it.

Thanks Tom...I went through DK and didn't find anything appropriate but I did search Mouser and got the exact cap you described...in fact 3 of them. Before I replaced anything, I brought this up very slowly on a Variac and a succession of bulbs. I have static out of the speaker, all the tubes are lit and the CRT filament is lit. No light on the screen though. How do you check the HV on one of these 3KP4 tubes?

[Electronic M]

Originally Posted by Chris K

Thanks Tom...I went through DK and didn't find anything appropriate but I did search Mouser and got the exact cap you described...in fact 3 of them. Before I replaced anything, I brought this up very slowly on a Variac and a succession of bulbs. I have static out of the speaker, all the tubes are lit and the CRT filament is lit. No light on the screen though. How do you check the HV on one of these 3KP4 tubes?

I think I just used my 30KV HV probe and looked for a little on the bottom end.y fluke only does 1KV, and my older meters only do 1600V...

[Chris K]

Originally Posted by Electronic M

I think I just used my 30KV HV probe and looked for a little on the bottom end.y fluke only does 1KV, and my older meters only do 1600V...

Any of the crt base pins, except for the filament, will show HV? According to the schematic the HV is 2.5K. There’s no traditional donut shaped flyback on the tv. It’s like a large adjustment coil winding