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Re: [TCML] Optimizing coil performance



It may be less expensive to drop in some PF correction caps.  Use motor RUN
caps not motor start caps.

Dr. Resonance



On Fri, Aug 15, 2008 at 5:58 PM, <ConorPerry@xxxxxxxxxxx> wrote:

> Thanks for the tip DC!
>
> On my little 4" coil I had built it so that the secondary windings started
> at the same
> elevation as the secondary coil.  Can't say why I did that now, but
> probably(maybe?) had a
> reason at the time.
>
> Anyway, just did some testing by raising the secondary up 3/4" and I could
> tell the
> difference right away.  With my gap set at 1/4" and the sucker-gap vacuum
> running about half speed it now chugs along nicely, better than before.  I
> think I'm at the limit of what i can pull from the wall outlet.  My meter
> shows bouncing around 15Amps and I don't have any power factor caps.  I
> guess that and a bigger variac will be my next equipment purchases.  I've
> got a 60Amp 230 drop for my welder that I could tap into.  Then I can move
> all my gear up to a larger coil! Already started collecting parts.
>
> CP8071
>
> ----- Original Message ----- From: "DC Cox" <resonance@xxxxxxxxxxxx>
>
>> <clip>
>> With an 8 inch dia sec you need to experiment with sec elevation above the
>> horizontal pri plane.  Usually around 3.75 to 4 inches with 1.25 pri-sec
>> spacing works good.  Again, with an 18 inch dia inductor the vertical
>> spacing works best with 6.75 inches and 9 inches is required for any 24
>> inch
>> dia sec.  I discovered years ago this relationship is a near linear
>> function
>> both upwards and downwards.  I did a lot of experiments with various size
>> coils using a large brass ead-screw setup to actually raise the sec up and
>> down while it was running.  I was quite surprised how high the sec needs
>> to
>> be elevated to achieve maximum spark length.  You can experiment with your
>> setup using 1/2 - 3/4" chunks of plywood to raise the sec small increments
>> at a time.
>> <clip>
>> Dr. Resonance
>>
>
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