Re: No Terry Filter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

Ed,
Do you have a design for a resonant charging driver for ignition coils? I 
have been wanting to do this but I haven't seen any examples where someone 
else has done it. So far, I have run my coils with a dimmer and 2 MO caps 
in parallel (1.95 mF total) and with a 555 wired as an astable 
multivibrator running between approximately 200Hz and 1000Hz.  I'm probably 
crazy but what I had in mind is using a MOT with a voltage doubler driving 
a resonant charger and cap using either a spark gap or SIDACs to discharge 
the cap through the primary of the ignition coil. Peter Terren has an 
example of driving an ignition coil with a MOT and SIDACs on his site. I 
would appreciate any advice.
Paul
Think Positive

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Monday, May 02, 2005 8:11 PM
Subject: Re: No Terry Filter

> Original poster: Ed Phillips <<mailto:evp@xxxxxxxxxxx>evp@xxxxxxxxxxx>
>
> "Original poster: 
<<mailto:steve.conner@xxxxxxxxxxx>steve.conner@xxxxxxxxxxx>
>
>  >What kind of chokes are those?  Inductance?  Current?
>
> They are 10 Henry (nominal) 100mA iron cored chokes
> sold by Maplin here (part# ST28) They look like little
> EI cored transformers. They are meant for a tube audio
> amp kit that Maplin used to sell. I imagine you could
> get something very similar from Hammond in the US.
>
> I modified them a bit to try and increase the voltage
> handling.
>
> Read all about it on my website
>
> 
<http://www.scopeboy.com/tesla/tc2schem.html>http://www.scopeboy.com/tesla/tc2schem.html
>
> Steve Conner"
>
> Steve:
>
> Thanks for the dope.  What's their DC resistance and where do you get
> them?  Would be good for resonant-charging drivers for ignition coils.
>
> Ed
>
>