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Re: [TCML] Pig based coil design.

Hi Jim, all,

"I" tend agree with you on the spark gap design, too. Forced
air (or vacuum blown) stationary multigap systems are most
certainly an improvement over a plain, 2-electrode static gap
for larger power/heat dissipation but when you start trying to
design an air blown, stationary multigap system to dissipate the
associated heat of a multi-KW powered system, I believe you
reach a point where the cost of PROPERLY constructing the
air cooled multi-gap system begins to rival the cost of a suitable
and comparable ARSG. I'm certainly not going to get myself
into the trick-bag of trying to assign a given numeric value to
this KW rating but I think most of us would probably agree
that it's pretty safe to say that >10 kVA systems are certainly
going to significantly benefit from the choice of an RSG/ARSG
system vs. the even the most elaborate air-cooled, stationary
multi-gap system. Also, note the 20% "duty cycle" that Gary
cites for running his air gap system in his additional "chicken
based coil design" posting. This would help to address the
excessive heat build-up with processing 12 kW (probably
12 kVA would be a more accurate statement unless it's as-
sumed that he can truly reach a near 1 power factor), but
this also proves your (and my) point.

David Rieben
----- Original Message ----- From: "Jim Mora" <wavetuner@xxxxxxxxx> 
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Saturday, November 07, 2009 6:14 PM
Subject: RE: [TCML] Pig based coil design.



Hi Gary,
Free PVC is good, your advice on spark gaps is less desirable. I had a blown gap on my 8" coil that worked very well. I would think things would tend to 
melt down @ 12KW with your gap style. Can anyone second this claim?

Thanks,
Jim Mora

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of gary350@xxxxxxxxxxxxx
Sent: Saturday, November 07, 2009 3:06 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Pig based coil design.

Ok.... what exactly are you looking for.  Plans you can copy?
Here is a link to my 10" coil. Secondary is 950 turns of #18 enamel coated 
copper wire close wound on a 10" diameter PVC pipe.  Secondary coil has 3
coats of polyurthane.  Primary coil flat would 1/4" copper tubing 1/2"
spacing with strike rail.  Variable speed vacuum fan RQ spark gap.
Capacitor is .035 uf 40K volts. The coil produces 12 foot arcs on about 12KW at 14,000. volts. The variac tunes the spark gap to the exact speed to get 
maximum output.  I can dial in about 1 extra ft of output arc length with
the spark gap vacuum fan speed control.
My suggestion is forget the rotary it is just a fancy over priced toy. Build 
a variable speed vacuum fan spark gap.

http://home.earthlink.net/~gary350/tc10-4.jpg

I have a 15" diameter PVC pipe you can have it FREE if you come and get it
in Murfreesboro TN 37129.  I have a truck load of other diameter PVC pipe
6", 8" and 10" it is all free to anyone that will come and get it.







-----Original Message-----

From: Travis Tabbal <travis@xxxxxxxxxx>
Sent: Nov 5, 2009 10:58 AM
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: [TCML] Pig based coil design.
I was wondering if someone had a JavaTC file they would be willing to share 
for a chicken based coil. I was thinking secondary diameter in the 12"-24"
range. The chicken is 14.4Kv 10KVA. The gap will be rotary, not yet

designed.

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