RE: Necessity of NST Protection Filters and Safety Gaps

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi Luke,

At 12:04 AM 1/17/2004, you wrote:
>Thanx for the links
>That answers my question about inductors in the filter circuit.
>Using ohms law with a 60 ma NST the voltage drop across each resistor
>would be about 60 volts totaling 120 volts.  Does this hurt performance?
>Or is the 120 volts (0.8% of the NST output) small enough to be
>considered negligible?

It does hurt performance just slightly, but not enough to worry about.  Of 
course, a blown NST really hurts performance ;-))


>And why is the capacitor value across the NST not needed to be any
>particular value?

The filter can have a pretty wide range of capacitance.  It is not 
precisely tuned at all.  Probably any where from 10kHz to 50kHz.

Cheers,

         Terry


>Luke Galyan
>Bluu-at-cox-dot-net
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com]
>Sent: Friday, January 16, 2004 8:25 PM
>To: tesla-at-pupman-dot-com
>Subject: RE: Necessity of NST Protection Filters and Safety Gaps
>
>Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
>
>Hi Luke,
>
>Inductors can "ring" or not work when put in series with teh NST's giant
>
>inductance.  See the papers at:
>
>http://hot-streamer-dot-com/TeslaCoils/MyPapers/rlcfilter/rlcfilter.html
>
>http://hot-streamer-dot-com/TeslaCoils/MyPapers/rcfilter/rcfilter.html
>
>http://hot-streamer-dot-com/TeslaCoils/MyPapers/
>
>Cheers,
>
>          Terry
>
>
>At 08:53 PM 1/16/2004, you wrote:
> >May I ask why inductors are not used instead of the resisistors since
> >the react with frequency?
> >
> >What is a MOV?
> >
> >And what is the method to properly set the safety gap?
> >Are you talking about the safety gap at the Main spark gap or the
>safety
> >gap in the NST protection circuit?
> >
> >Luke Galyan
.........