Re: Micro Tesla Coil design

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

Original poster: "robert & june heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Dan: Very small high voltage coils are hard to find. Model airplane coils
are well built, but very hard to find now days as glow plug are now all that
is used. Strobe light trigger coils are wound for 4Kz output but require
several hundred volt input to drive then or a compleat circuit salvaged from
a $1.50 disposable camera (used) from a shop. You can make a coil by winding
a primary on a soft iron wire core ( rod shaped) or ferrite rod and place 2
of the secondary winding coils taken from a radio shack strobe trigger coil
over your primary. This will give you about 8Kv out using a 24T CT primary
in a little less than the size of a "C" cell using an Astable multibrator
oscilator circuit to drive it. These coils use a 1/4" coil core so there is
just enough room to do it. Any burned black iron wire will work up to about
5KHz with no problem. Over 5KHz you nead ferrite as a core. I like burned
wire as  is easy to shape and any size you make it. If you use long wires
you can bend then into a compleat closed magnetic core after you finish like
a flyback transformer.
     Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Thu, 19 Dec 2002 18:13:50 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Micro Tesla Coil design
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Thu, 19 Dec 2002 18:16:18 -0700
 >
 > Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
 > <evp-at-pacbell-dot-net>
 >
 > Tesla list wrote:
 >>
 >> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
 > <dhmccauley-at-spacecatlighting-dot-com>
 >>
 >> Might still be a bit big to be considered a "microcoil".  I'm looking for a
 >> transformer thats no bigger than a C-battery maybe.
 >> Something like 2kV, 1mA max output or similar.
 >> Secondary coil might only be 3/8"-1/2" in diameter.
 >> Be very high frequency - that could pose problems in itself.
 >>
 >> Dan
 >
 > Try a model airplane engine ignition coil, which fits that description
 > pretty well.  Drive with a transistorized interruptor circuit.  I have
 > one running in a hand-held transmitter to play with coherer receivers;
 > runs off a four cell NiCad pack.
 >
 > Ed
 >
 >