Re: Rebuilding NST
In a message dated 7/1/99 2:29:20 AM Pacific Daylight Time, tesla-at-pupman-dot-com
> I have unpotted a 15/30 nst and removed 2 shunt plates from each side of
> each secondary (eight total). Is that too many? I assumed that when people
> said they removed two, they meant two/side/secondary.? Now the primary is
> loose between the two secondaries. Should I move the secondaries tight
> against the primary, or place some type of insulating shims between the
> primary and secondaries? I'm an engineer but not electrical, and am unclear
> as to whether it is the removal of the shunts that increases the current
> rating, or the moving of the secondaries closer to the primary.
> My next question is whether I should repot this in something, or run it
I would press wood or plastic shims back in to get the windings tight on the
core. I had (as in past tense) a real nice 12 kv 120 ma transformer that I
unpotted to repair. I ran it dry and it shorted in the secondary. I wish I
had submerged it in oil, it would probably still be working if I had.