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Re: Safety Chokes

Original poster: Gregory Hunter <tesla_39560@xxxxxxxxx>

The best advice I can offer for building an NST safety
choke is--don't!

If you wish to protect your NST, I suggest a simple RC
lo-pass network. Use ~1k ohm ceramic power resistors
in each HV leg, and 500-1000pF bypass cap from each HV
terminal to AC ground. Back this up with a safety gap
from each HV terminal to midpoint ground.

If you shop carefully using surplus sources, the power
resistors may be purchased pretty cheaply. HV ceramic
caps are so cheap new, I don't know if surfing for
bargains is worthwhile. The safety gap may be
fabricated from hardware store nuts & bolts.


--- Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: JBarrett@xxxxxxxxxxxxxxxx
> Can anyone tell me how do design a proper safety
> choke for a 12,000 volt
> NST and a 4.5" coil.
> I have searched pupman.com but I haven't found
> enough info yet. I'm willing
> to research this topic if pointed in the right
> direction.
> Jim

Gregory R. Hunter