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Re: Ignition coil : mini tesla coil?



I've also built a circuit like this, and while it does work well, I'm not
at all sure it can be compared to a tesla tank circuit. I used a 600 watt
variable light dimmer in series with a few motor start capacitors(caps in
parallel). 
At first I could never take the capacitance over 4 uf without strange
bubbling and knocking noises coming from both caps and coil. The thing,
after I added extra insulation, in the form of -A LOT- of silicone
sealant, produced a 2" long thick swath of hot, snapping sparks. They
appeared to be bursts of high frequency ac. 
I never was able to get a coil system to run off it.

Now, after removing the coil from its case, replacing a fried primary,
fixing a break in the secondary, and removing the high voltage return
connection from the negative side of the primary, It performs much
better.  

I use 8uf or more, and the thing gives sparks as large as I can separate
the hvout wires (no more than ~3.5"). No bubbling or knocking noises,
now. 


-The Electrophile-
Grayson Dietrich,  Medina, OH
See my HV Haven (recently new-and-improved!!)
www.geocities-dot-com/WestHollywood/Stonewall/2509/index.htm


On Sat, 17 Jul 1999 17:01:54 -0600 Tesla List <tesla-at-pupman-dot-com> writes:
>Original Poster: "Ken Donnell" <bigken-at-a.crl-dot-com> 
>
>What value cap did you use? I'd like to try this...
>
>Ken Donnell
>bigken-at-a.crl-dot-com
>
>Earth first ... we'll mine the other planets later.
>
>----------
>> From: Tesla List <tesla-at-pupman-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Re: Ignition coil : mini tesla coil?
>> Date: Thursday, July 15, 1999 6:10 PM
>> 
>> Original Poster: ginger <stephen_crawshaw-at-tesla94.freeserve.co.uk> 
>> 
>> Jeff, All
>> 
>> I have used a solid state light dimmer circuit in series with a cap 
>to
>switch
>> power to an ignition coil. This produces very good results and is a
>simple
>> circuit. You can get the light dimmer chips cheap, less than 3.00. 
>I
>used one
>> rated at 6 amps. This was my first coil design and I used doorknob 
>caps
>as the
>> tank cap - not that successful, but the ignition coil part worked 
>fine.
>> 
>> cheers
>> 
>> steve crawshaw
>> 
>> Tesla List wrote:
>> 
>> > Original Poster: "Jeff Corr" <corr-at-enid-dot-com>
>> >
>> > Only slightly understanding the construction of an ignition coil, 
>could
>> > (or does) it represent a mini tesla coil.  I have been working on 
>one
>and
>> > I
>> 
>> SNIPARAMA
>> 
>> > Any thoughts as always?
>> >
>> > Jeff
>> 
>> --
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>

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