[benman94]

I purchased a 7 inch Transvision kit set (the type with the plywood board front panel, not in the factory cabinet).

Anyway, it is missing the HV transformer. I'm going to have to call Arlynn at Heyboer transformer and see if he can wind a suitable replacement. I know the primary should be 117 or 118 volts, with two secondaries, one wound for 2.5 volts at 2 amps for the 2X2 rectifier. It's the HV winding that I'm not sure what to spec. The originals I believe were wound for 2500 or 2700 volts (depending on which version of the service info you trust). But at what amperage? 1000 to 2000 microamps sounds reasonable to me, but I know that if I spec it too high, and the regulation of the transformer sucks, that the rectified HV could shoot up.

I believe the 7EP4 has a max anode voltage rating of 3000 volts (design center) as opposed to the 5BP4 from which it was derived (which has a max anode voltage of only 2000 volts).

Any ideas? I suppose if I have it wound and the HV is too high, I can tack in a string of Zeners to regulate the HV at whatever voltage I want but I'd like to avoid going that route if possible.