RE: door knob caps

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

Original poster: "Dave Halliday by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dh-at-synthstuff-dot-com>

Unnnhhhh - you can mail order and product quality will be --->waay<---
better than the warehouse floor-sweepings that radio shack sells these
days.

Besides, looking at their website, they only sell Ceramic Disc
capacitors with a 2KV range.  These simply will not work.  If you buy
these for this application, you are taking dollar bills and burning
them.  No, not even that because you would get some satisfaction from
the flame.  You are wasting your money.

The reason is that the cap may be rated at 2KV but this is only one part
of the problem.  The capacitance-at-that-voltage is minimal.  It is the
capacitance that stores your energy and if you don't have any energy
storage, you are going to get a less-than-zero performance.

Check this site for a discussion on MMC - they are using them for Tesla
Coils but they are very applicable to Marx generators too:
http://www.thegeekgroup-dot-org/projects/MMC/

You _will_ be spending about $100 and this _is_ a good chunk of change
but, any money you spend at radio shack will be dollars pissed down the
drain so don't do that, start saving.  What you will be buying will work
perfectly and deliver good solid fat performance.



 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Monday, August 18, 2003 6:56 AM
 > To: tesla-at-pupman-dot-com
 > Subject: Re: door knob caps
 >
 >
 > Original poster: "John by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <fireba8104-at-yahoo-dot-com>
 >
 > Thanks Dr. Resonance,
 > I was considering using MMC(tons of radio shack 2kv caps) for
 > caps to if I
 > couldn't find doorknobs. Unfortunately I live in New Jersey(no jokes
 > please) and Chessehold is to far away. Also I hope you win
 > that 250 kv
 > x-ray transformer. I say at least a 4 stage Marx.
 > Thanks,
 > John
 >
 >
 > Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Dr. Resonance by way of Terry Fritz "
 >
 >
 > I have a very nice design for a Marx using MMC's and they
 > only cost $3 per cap. If you make it to our Cheesehead
 > Teslathon I can share the data with you.
 >
 > We charge at 60 kV/stage using either a flyback tripler or an
 > x-ray xmfr (faster charging) and run 60 MMC caps on each
 > stage. This gives up .01 MFD total cap per stage at 60 kV and
 > makes a very bright output spark at 600 kV with 10 stages.
 >
 > Less expensive than doorknobs.
 >
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo WI 53913
 >
 >