[TCML] Pig based coil design.

[David Rieben]

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 at gmail.com>
To: "'Tesla Coil Mailing List'" <tesla at pupman.com>
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 at pupman.com [mailto:tesla-bounces at pupman.com] On Behalf
> Of gary350 at earthlink.net
> 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 at tabbal.net>
>>Sent: Nov 5, 2009 10:58 AM
>>To: Tesla Coil Mailing List <tesla at pupman.com>
>>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.
>>_______________________________________________
>>Tesla mailing list
>>Tesla at pupman.com
>>http://www.pupman.com/mailman/listinfo/tesla
>
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