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

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

Original poster: "J. B. Weazle McCreath" <weazle-at-hurontel.on.ca> 


At 06:10 PM 07/08/04 -0600, you wrote:
 >
 >Can anyone tell me which polarity will form more corona and arc further
 >at a given DC voltage?
 >
 >Thanks,
 >David Rieben
 >
Hi David, Coilers,

I believe you're trying to determine the polarity of an X-Ray tranny
you have.  If it's made anything at all like mine, the negative high
voltage lead will be brought out to a small terminal on a barrier
strip while the positive will be an elaborate bushing/insulator.

Mine also has a resistor network immersed in the oil which has a tap
brought out to a terminal that allows measurement of the voltage at
the tap point.  Knowing the ratio of the tap to the full voltage, I
use a 0-1 mA. movement to read 0-100 KV at full scale deflection of
the meter.  For safety I put a diode across the meter terminals so
that if the meter goes open I don't have any stray high voltage
lurking around the terminal strip.

73, Weazle, VE3EAR/VE3WZL

Details of my "Hyperbaric Gap" and Tesla coil are at:
http://www.hurontel.on.ca/~weazle