Re: Solid state gaps - what happened? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 06 Jun 2007 23:38:10 -0800
From: Greg Leyh <lod@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Solid state gaps - what happened? (fwd)

Hi Gary,

I did finally finish the prototype twin coils that I've been working on 
for the last (gah!) 8 years, and their solid-state drives appear to work 
fine.  Here's a brief clip of the coils spanning a 16ft gap, at 8kW:  
http://www.youtube.com/watch?v=06hWFQSqJfI

The primary circuit is a classic disruptive design, operating at a Zpri 
of about 0.69 ohm.  IGBTs were the only possible solution;  a spark gap 
would have been far too lossy.   Since the primary recovers unused 
energy from the secondary for the next pulse, the Cpri has to be topped 
off using high-frequency resonant chargers, rather than by off-line or 
DC resonant techniques.   GL