Re: Micro Tesla Coil design

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

Original poster: "Jolyon Vater Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

I know this sounds pessimistic but but with input powers as low as this
isn't there a real risk that micro coils (nice) can turn out to be a
micro-perfomance coils (not so nice!) unless they are designed well, which
can be tricky to do.

Throughout most of my (limited) experience I have found that it is easy to
build a TC that works but less easy to build one that works well. I have
been lucky to get more than 1 inch of spark from anything powered by my
ignition coil driver and when I did (and got 6" of spark) I also had to use
a DC rectifier, 22nF of bottle capacitors AND a 25" dia topload -hardly a
"micro"-coil is it! Am I doing something wrong here?

Jolyon

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, December 20, 2002 1:13 AM
Subject: Re: Micro Tesla Coil design


 > 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
 >
 >
 >