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Forums
4hv.org :: Forums :: Tesla Coils
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new type nst?

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haulinick
Mon Apr 16 2007, 10:49PM Print
haulinick Registered Member #619 Joined: Sat Mar 31 2007, 05:26AM
Location: San Jose, CA
Posts: 16
I just received an nst I bought. I've heard about these new types. It is model: ja a410el made by johny austin neon. It is 10kv at 30ma. It shuts off when there is no load on the hv side. I hav heard that they use high frequency to produce hv. Is this true? and if it is, would that mean it is not necessary to build a terry filter for tesla coil use?
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HV Enthusiast
Mon Apr 16 2007, 11:38PM
HV Enthusiast Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
if it is a high frequency NST, you won't be able to build a conventional spark gap tesla coil with it. You'll have to build a DC topology tesla coil.
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Coronafix
Mon Apr 16 2007, 11:43PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Why do you say that? Because of the type of NST it is or because it isn't charging with
60 cycles therefore our usual formulas don't work.
Tesla used a high frequency generator to power his coils, and a spark gap too.
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ragnar
Tue Apr 17 2007, 02:41AM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
EVR says that for the simple reason that a high-frequency AC current will only minutely charge and discharge the capacitor.

The best way to utilize the transformer is to rectify the output to DC and try a resonant charging topology, or DC topology as Dan suggested.
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Coronafix
Tue Apr 17 2007, 03:02AM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Oh I see, now. Just did the calc for resonant charging and
see that the cap bank will be quite small therefore not allowing
a very big bang buildup. dead
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