Re: Chokes vs Safety Gaps

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

Dave: on AC coils you can get away with a lot of things that you won't get
away without  on a DC TC ,and the high speed choke is one of them,
    Robert    H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 10 Feb 2004 06:04:55 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Chokes vs Safety Gaps
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 10 Feb 2004 06:16:35 -0700
 >
 > Original poster: dgoodfellow-at-highstream-dot-net
 >
 >
 > ----- Original Message -----
 > From: Tesla list <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Monday, February 09, 2004 8:19 PM
 > Subject: Re: Chokes vs Safety Gaps
 >
 >
 >> Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>
 >>
 >>
 >> I may be off topic a bit but I still defend a small RF choke before the RF
 >> signal goes into the NST.
 >
 >
 >
 > I used to use a pair of woofer chokes, the type available as a passive
 > crossover from any automotive Hi fi supplier. I put the chokes right on the
 > high voltage terminals. No other protection. They were ferrite core and were
 > wound with about 14 gauge magnet wire. They were made to start attenuating
 > the signal 6 db per octave, starting at 100 hz. I figured that as long as it
 > passed 60 hz, it would be fine, and by the time the chokes saw operating
 > frequency of over 100khz, the attenuation would be down by something
 > ike  -36db.  Significant when you consider that every 3db drop represents a
 > halving of power.
 > Then I read the findings made by members of this list, and took them off!!
 > Maybe I'm just lucky, but the only time I saw a neon sign transformer fail
 > right before my eyes was when we had a few 15/60's on a coil with a variable
 > speed rotary gap. There was no protection on the transformers at all. That
 > much you can take to the bank- never run an nst with a rotary unless it is
 > synchronous. We weren't running the transformers that hard, yet it died
 > within the first 5 or 6  15 second runs.
 > I wish I had the test equipment to see what my woofer chokes did on the
 > transformer for myself, since everyone's idea of what is a suitable choke is
 > different. Anyone else ever use woofer chokes?
 >
 > Cheers, Dave Goodfellow
 >
 >