Re: Polarized HV/ what's + and what's -

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


Replace the phenolic that is HV tracking with G-10 glass laminate and you
won't' have to repair it again.

Dr. Resonance
 >
 > I recently scored a pretty nice x-ray transformer. I think it's
 > rated around 150 kV -at- ~ 600 mA. I've already repaired a
 > carbon tracked phenolic rectifier mount twice. The new
 > phenolic mounting block also carbon tracked after the
 > first repair but so far the second repair has held up (keep-
 > ing my fingers crossed). Anyway, I'm wanting to keep
 > the rectifiers intact in this transformer since I'm wanting
 > this one as a very high DC voltage source. Since I have
 > it all back together after the last repair I really don't want
 > to dig into the oily mess again just to get a close look at
 > the diodes to determine the polarity of the HV outputs. I
 > have heard that one polarity tends to form corona easier
 > and actually arc further at a given voltage than the other.
 > I've noticed this phenomena from the output leads of this
 > transformer as I slowly ramp up the input voltage to it with
 > a big variac.