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Re: Heat from pig resistance.
Tesla List wrote:
>
> >From Esondrmn-at-aol-dot-com Sat Dec 7 00:01:48 1996
> Date: Fri, 6 Dec 1996 16:52:51 -0500
> From: Esondrmn-at-aol-dot-com
> To: tesla-at-pupman-dot-com
> Subject: Re: Heat from pig resistance.
>
> In a message dated 96-12-06 01:39:44 EST, you write:
>
> << Ed:
> Just wanted to mention that I also use the oven elements in parallel
> with my welder. I have never even tried the series arrangement, I guess
> for two reasons. The first being that I also thought the voltage drop
> wouldn't help performance and the second reason was that I got such good
> results with the parallel connection. I used two 2200 watt elements
> that I wired in series with themselves, then one element only and then
> the two both in parallel with the welder. A single element in parallel
> with my welder gave the best spark length and this was really easy to
> see, without any doubt in the results. There has already been a number
> of poosts on the facts surrounding this type of results so I won't again
> dive into that stuff. Since this was working I never needed to try the
> series arrangement. A bit off subject from your question, but I hope it
> is of some interest.
>
> Chuck Curran >>
>
> Chuck,
>
> My system also worked best with the elements in parallel until I reconfigured
> the primary components and wiring. I should try different combinations of
> elements in parallel before I go out and buy some new resistors to use in
> series. Unfortunately, I am probably going to have to wait for spring.
>
> Once again, what size is your coil and how much power are putting in?
>
> Ed Sonderman
Ed:
My coil uses an acrlyic 8" dia by 36" long secondary with 28" of #20
wire on it. I use a 48"x 8" toroid with a 15 turn 1/2" dai copper tube
primary mated to a .025 mfd. -at- 20,000VAC CP cap. The power supply is a
14,400 VAC pole pig at 10 KW from T&R in South Dakota. I got a 28 amp
0-280 VAC autotransformer and a Century welder on the pig primary side.
The spark gap is a seven gap stationary in series with a rotary with
twelve moving points driven by a Carter 1 HP 0-10,000 RPM motor. That's
the entire story here, with the results being 80" sparks, recorded on
video. The average power draw while getting maximum spark was 18-25
amps at 300 VAC measured output from the autotransformer(high line
voltage around here!). Rotary gap never showed any signs of difficulty.
Last night I put the second coat of polyurethane on the new system
secondary. I have finished winding the 15 1/4" diameter by 60" inch PVC
form with about 56" of #15 wire. It is pretty heavy, about 37 lbs of
wire and 40 lbs for the form. It looks great at this point. The new
stationary gap is nine 3" long by 1" inch diameter solid brass rods
mounted in an acrlyic housing, all spaced .025" apart. I'm using one of
the American Scientific vacuum cleaner motors for this vacuum gap system
that again will run in series with the rotary I already mentioned.
While putting the first coat of poly on the new secondary, some dripped
on our basement rec room rug----how long will it be before the wife
notices this?? Any ideas? Maybe I can convince her it was our dog?
I'm video taping this entire construction project, so I might have
something to share with others if it turns out to be at all of
interest. I yell when I've got some more accumulated.
Chuck