no filtering or Inductor filtered HV power supply?

[guest]

Considering safety, I'm not happy about using capacitive filters for the fusor HV supply. What would happen if I used a neon transformer as an inductive filter, or just simply didn't use any filtering at all? I'm thinking that a pulsed DC supply will only be less efficient but usable. - Allen & Craig Wallace

[DaveC]

Allen & Craig - You didn't mention what frequency your HVPS uses. If you use a high frequency supply, where typical freqs are in the 10 - 25 kHz range, the energy storage issue is not scary, and the regulation is quite good. Ripple can usually be held to a few percent with no extra filters. Most newer Xray designs use capacitor-diode type multiipliers - cockcroft -walton (?) types. For a few hundred watts, you need a few nF HV caps and some 10kV fast recovery diodes.

A company that makes elegant designs of these supplies also sells some of the parts, and has an excellent handbook on High Voltage Multipliers.
They are VoltageMultipliers Inc. in Visalia, CA.
I think the website is www.voltagemultipliers.com

Dave Cooper