Re: [TCML] Beginner Transformer Question

[resonance@xxxxxxxxxxxx]

The PT will offer much better performance.  The difference between 7.2 kV
and 12 kV is minimal when you consider the much more powerful sec currents
available.  Caps love a lot of current which gives a high kVA power level
into the pri.  The PTs will take the abuse but be sure to use a good RF
filter on the secondary side and also RFI filters on the primary side.

You could even run a pair of separate 120 vac circuits with a ballast in
each circuit.  Then you can parallel them at the 120 V xmfr pri and draw
approx 16-18 Amps on each circuit.  This will give you approx 3.8 - 4.0
kVA which will translate into very powerful sparks off your sec coil.  Use
JAVATC to do the complete design.  At this power level I would consider a
8 to 12 inch dia. coilform x 4-5 feet long, and a nice 24 x 6 inch toroid.
 A .05 to .07 uF cap would work well at this power level with a non-sync
rotary sparkgap, 10 electrodes at 1725 rpm or use a belt drive to adjust
and experiment with different break rates to see which one works best on
your coil.

Dr. Resonance




> I hope this isn't too basic a question. I have a 12kV/60mA NST that I will
> build my first coil with. I'm looking down the road a bit and am trying to
> decide whether to take advantage of an opportunity at hand. I have a
> chance
> now to acquire a GE potential transformer 7200v @ 1.5KVA.  I know this has
> twice the VA capacity of my NST, but what effect will the reduced voltage
> have on coil performance?  I am also aware of the ballasting and added
> precautions associated with this type of non current limited transformer.
> Thanks.
>
>
>
> Ken
>
>
>
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Dr. Resonance

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