Re: ignition coil for high voltage source

["Grayson B Dietrich" <electrofire-at-juno-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Well, I don't know what voltage spikes produce; I've never measured it. I
have run this circuit with many different ignition coils, without
experiencing noticeable damage. I think that the capacitor may have some
voltage limiting effect, or at least it limits the overall power draw
somehow. The larger the cap, the closer I seem to be to overloading the
coil, and the more noise the thing makes. I can usually force about 2" of
arc out of a coil before it begins to sound like the oil is bubbling. I
didn't design this circuit-- I just based it off of a description I once
read about such a circuit, except said description was set in the land of
220VAC.

I suppose i could take a DMM to the thing to see what the voltage looks
like...  ...but I wouldn't "see" the spikes, then, would I?

-Grayson

On Wed, 07 Jun 2000 12:00:05 -0600 Tesla List <tesla-at-pupman-dot-com> writes:
> Original Poster: "Bill Parn" <parn-at-starpower-dot-net> 
> 
> Hi Grayson and Coilers,
> 
> I really like the simplicity of this design.  I know the dimmer
> switch is going to give the spikes of voltage necessary to get
> the ignition coil to operate, however I was wondering do we need
> a resistor of some sort to get the 120VAC spikes down more
> in the range of 18Volts or less to prevent from destroying the
> ignition coil?
> 
> Cheers,
> Bill Parn
> 
> 
> ----- Original Message ----- 
> From: Tesla List <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Tuesday, June 06, 2000 1:32 PM
> Subject: Re: ignition coil for high voltage source
> 
> 
> > Original Poster: "Grayson B Dietrich" <electrofire-at-juno-dot-com> 
> > 
> > http://www.electrophile.8m-dot-com/wallignt.gif
> > 
> > This shows a very simple means of driving an ignition coil. It can 
> and
> > has been used to power small TC's by other folks, so while I have 
> no
> > personal experience with applying this circuit in that fashion, I 
> belive
> > it can be done. You may need to add a rectifier to it-- a few MOT 
> diodes
> > in series should work fine.
> > 
> > -Grayson Dietrich
> > 
> > On Wed, 31 May 2000 18:23:02 -0600 Tesla List <tesla-at-pupman-dot-com> 
> writes:
> > > Original Poster: "Jeremiah" <jmeizis-at-metallicafan-dot-com> 
> > > 
> > > Is there any way you could use 1 or maybe 2 ignition coils in a 
> > > circuit as
> > > a power supply for a tesla coil.  If there is such a circuit or 
> a 
> > > high
> > > voltage ignition coil circuit i would be grateful for the help.
> > > Jeremiah
> > > 
> > > 
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> 
> 

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