Voltage reversal

• To: tesla-at-pupman-dot-com
• Subject: Voltage reversal
• From: "Herwig Roscher" <herwig.roscher-at-gmx.de> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 04 Nov 1999 12:12:30 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hello coilers!

Prior to designing my own polycap, I wanted to buy one and sent the spec to
some companies. The main problem - besides the price of course - was the
100% voltage reversal, that shortens the expected life drastically.

I wonder, whether the use of a HV bridge rectifier between xformer and main
gap would help, to keep the cap alive a little bit longer. In each arm  of
the rectifier one could use e.g. 3 HV diodes from microwave ovens in
series, each parallelled by a resistor and a small cap. Another possibility
would be diodes with an avalanche characteristic, which require no
parallelled components.

One drawback could be a material migration in the main gap.

Did somebody try this circuit?

Herwig

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