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Re: NST testing
I do the arc test from each lead to case-ground, and from lead to lead.
If that checks ok, then I hook the NST up to an analog meter and measure
the current flowing through each leg.
On 04-Jun-00 Tesla List wrote:
> Original Poster: "sundog" <sundog-at-timeship-dot-net>
> Hi all, Jeremiah,
> Mkay, I'm assuming you've started tinkering with that NST already,
> with the jacob's ladder and such. One mention I haven't seen
> anybody mention,
> On my 9/60 I can draw the arcs from one terminal to the other out
> to around 1.5-2 inches long, and around an inch from the terminal
> to the case. If the outputs of the two sides are dramatically
> different, then you may have a carbon track starting in the potting
> of the xformer. If it's tar, a quick re-melting will fix that.
> (well, it isn't really quick, but it does work). If you're getting
> nice hot fat arcs, you're all set! Have fun, and keep it safe!
> -----Original Message-----
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
> Date: Saturday, June 03, 2000 11:38 PM
> Subject: Re: NST testing
>>Original Poster: "Christopher Boden" <chrisboden-at-hotmail-dot-com>
>>>Original Poster: "Jeremiah" <jmeizis-at-metallicafan-dot-com>
>>>I am soon to recieve my first 9Kv-at-60mA NST and i am not sure if
> it works or
>>>not and i was wondering if there is a way to test it.
>>Yes, but you have to be carefull. See if you can get a arc from
> each HV
>>terminal to the case, and then to each other useing a short piece
> of wire
>>held with a drumstick (or other good insulator, don't touch the
> wire or
>>you'll end up testing it as a defribulator). Usually, if they are
> bad they
>>die on one side of the secondary. This can be fixed, but it's a
> long messey
>>A friend of mine
>>>said that some NST's are not ballasted. I thought that all NST's
> had an
>>>internal ballast am i right.
>>To my knowledge (and I have a room temperature IQ) all NST's are
>>with various sorts of internal shunts, though some are removeable.
> But I'm
>>SURE someone will point out some antique obscure NST from some
> tiny company
>>that proves this wrong, as a rule though, don't worry about it.
>>Please email before 5:00 tonight.
>>It's before 5PM on half the planet. Time is reletive :)
>>Christopher A. Boden Geek#1
>>President / Founder
>>The Geek Group
>>Because the Geek shall inherit the Earth!
>>Get Your Private, Free E-mail from MSN Hotmail at