Re: 240 volts for my NST?

To: tesla-at-pupman-dot-com
Subject: Re: 240 volts for my NST?
From: "Adam" <adamsmith-at-mediaone-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 15 Feb 2000 16:47:32 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>> Original Poster: "Jon Lagler" <rockcrawl-at-netzero-dot-net>
>> 
>> Hello All,
>> I have a 12kv 30mA NST that I am considering depotting to increase the
>> output current. While discussing it with a friend, he said why not put 240
>> volts to the primary instead of 120. That should increase the output to 24kv
>> which I'm sure my 60kvdc MMC could handle. Will this work, or will I fry the
>> NST?

Jon, you would kill the NST for sure.  The insulation (coil-to-core) can
just barely handle the rated secondary voltage, and would not survive this
abuse. You would also saturate the core, and probably burn out the primary
coil.  You can run a 120v NST from a variac that goes up to 140 volts, but
go much beyond this it will fail in a hurry.

-Adam
adamsmith-at-mediaone-dot-net