NNTP-Posting-Date: Sat, 11 Jan 2003 15:27:08 -0600
From: Barry Lennox
Subject: Re: NST for tesla coil question
Date: Sun, 12 Jan 2003 10:29:08 +1300
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On Sat, 11 Jan 2003 12:55:06 -0800, John Larkin
>On Sat, 11 Jan 2003 15:48:13 -0500, "Jordan"
>> I want to build a small Tesla coil (less than 250W), and I'm planning on
>>using a NST for power, preferably 5000-7500V at 30mA. There are two types of
>>NST's, the big heavy ones that run at 60Hz, and the smaller, newer ones that
>>run at around 20KHz or so. The old ones weigh a lot but the new ones are
>>tiny, and are much more portable. Can I use one of these newer ones in a
>>Tesla coil system? Or are the internal components likely to get fried by the
>>harsh conditions? Thanks for the help!
>What's an NST?
It's a Neon Sign Transformer, same as MOT is Mircowave Oven
Transformer. I suspect the newer ones, which are basically a SMPS, may
not have enough EMV/transient protection to cope with a Tesal coil.
Certainly I'm sure the NST maker would disclaim all liability and
knowledge of such an application. I can just imagine their reaction
"You want to do what???? "
A few years back, I built one using an older "France" NST. I don't
think I'd have the courage to try a newer one.