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Re: switching options for huge cap discharges (fwd)

---------- Forwarded message ----------
Date: Sat, 14 Jul 2007 08:17:32 -0700 (PDT)
From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: switching options for huge cap discharges (fwd)

Please copy me on any replies.


--- Tesla list <tesla@xxxxxxxxxx> wrote:

> It is a little OT.  Please reply directly or use the
> hvlist.
> Chip
> ---------- Forwarded message ----------
> Date: Sat, 14 Jul 2007 05:02:27 +0000
> From: David Rieben <drieben@xxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Cc: drieben@xxxxxxxxxxx
> Subject: switching options for huge cap discharges
> Hi all,
> This may start to get a little border line OT but I
> was hoping to get some input
> on this. I am now in the process of trying to
> reconstruct my quarter shrinker
> cap assembly and the only thing that is really
> giving me a fit is how to safely 
> and reliably switch the 10s of thousands of amps
> from the discharge of a 15
> to 20 kJ capacitor bank. I've done this some before
> in the past but the huge
> currents systematically melted and destroyed the 1
> 1/4" square brass con-
> tact blocks after a few dozen shots. I noticed Ed
> Wingate used a drop switch 
> mechanism that utilized what looked like about 1/2"
> diameter tungsten rod con-
> tact points to switch the huge currents.
> What about triggered spark gap firing for this
> purpose? I'm sure that just
> as in a Tesla coil SG, tungsten is the superior
> metal of choice for quarter
> shrinker switch contacts as well. If anyone has
> experince along these lines
> and would like to share their experiences with me, I
> would be most grateful ;^)
> David Rieben

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