Pancake coil in xmfr oil (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 22 Jun 2007 10:52:28 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Pancake coil in xmfr oil




Jeff:

I was planning on an experimental flat coil later this summer.  I may even 
consider just using polypropylene, 10 mils thick, with 28 AWG wire. 
Thinking around 700 to 750 turns, then putting in an oil tight sealed 
acrylic box, circular shape.  I'm also considering an IGBT solid state 
driver for smaller size and high efficiency, eg, eliminating the pri spark 
gap which improves performance on the order of 40%!

What was your xmfr voltage and cap for your 300 turn coil?

Dr. Resonance


>
> That looks like nice stuff.  I've actually thought of using cartridge 
> paper
> from pool and water filters because it would allow circulation of the
> insulator to some extent.  This Nomex sounds like it would too.  The 
> biggest
> problem is the exclusion of all air.  If the interleave can absorb oil it 
> is
> so much better.  The least amount of air you start off with, the least
> amount you'll have to worry about later on!
>
> In the past even silk and cloths were used, oil-impregnated.  For primary
> coils using flat strap, and a wider spacing, cardboard was normally used.
> Many units though had primary coils made as thin copper strap (1" wide x a
> few thousanths thick) separated by thin oiled paper...but then again most 
> of
> the primary circuits were powered from tanks using less than 2000 volts...
>
> Jeff Behary, c/o
> The Turn Of The Century Electrotherapy Museum
> http://www.electrotherapymuseum.com
>
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