Re: NST Life Expectancy

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

Original poster: "June Heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

I have been using the same NST transformers over 50 years and I've never had
a problem with any of my 4 except the one I dropped and broke the insulator
off.    Robert  H
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, June 13, 2003 8:00 AM
Subject: NST Life Expectancy


 > Original poster: "WIZZARD . by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<pbobyk-at-hotmail-dot-com>
 >
 > My 4" coil and had one of the NST's die.
 > I suspect my protection circuit was the cause.
 > I made a Terry filter and put it on my remaining NST.
 > I believe the second transformer has now failed.
 > I'm new to this game but I think a transformer should last more than a
 > couple minutes of operation.
 > What is the normal life expectancy of an NST?
 >
 > The second 15KV/30mA transformer was doing great. The coil was tuned and
my
 > new RQ gaps were opened full..
 > I could hear some internal arcing inside the NST case and could smell a
 > burning smell.
 > I pulled the top off the transformer immediately and some smoke/steam came
 > out as I lifted the cover.
 > I could see the tar had cracks just like the last one that failed. This
 > time there was a small hole where what looked like water had condensed
 > around. The liquid was also condensed on the top that I lifted off. The
 > transformer case was quite warm if you grabbed the case.
 > What is happening?
 > How can I stop this.
 >
 > A quickly going broke coiler... LOL!
 >
 > _
 >
 >