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Re: Testing
---------- Forwarded message ----------
Date: Wed, 01 Oct 1997 17:48:52 +0000
From: Greg Leyh <lod-at-pacbell-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Testing
Larry Robertson wrote:
> Parts are slowly accumulating for the DC drive, Alltronics
> delivered a huge 2 uF 60kV pulse discharge cap for use as the
> accumulator, and we have inquiries in for HV diodes - which
> don't look to be all that inexpensive. Resonance caps still need to
> be constructed or bought, and a final design for the rotary thought
> out. It should be interesting to watch the transition from pulse
> mode to streamer mode as the speed of the rotary is ramped up.
Yes indeed! Gap speed is a wonderful knob to have, as the streamers
exhibit several very different modes of behavior between 70 and 400 PPS.
> My initial plan was to pulse charge the resonance cap through
> the storage cap, the discharge it straight to "ground" on the
> next presentation of the rotary electrodes. Then I thought of
> a way to pulse charge it on every presentation by reversing
> the polarity of the current on every other presentation.
How does your pulse charger work?
> It seems to me pulse charging to (e.g..) +15 kV; then -15kV when
> the polarity is reversed, should be the same as charging to
> 30 kV, then discharging to ground, but without overvolting the
> capacitor, except the ringup would be doubled. I've not yet
> figured out what this might mean to the cap.
Are you charging during the gap firing?
-GL