First coil - questions

• To: tesla-at-pupman-dot-com
• Subject: First coil - questions
• From: Keith Garvin <keithg-at-datalight-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Fri, 27 Nov 1998 23:13:32 -0700
• Approved: terryf-at-verinet-dot-com

Hello everyone,

I managed to get my first real TC running last night.
I went through several very cheaply built main
capacitors before doing it right.  I built alot of
the components over the last year and without any
input or research and did alot of things wrong.
But now that I got it doing something neat, I can
build it up.

The specs follow:
  6" secondary wound to 21.125" in length
  Unused toroid (4" by 16")
    (can't get break out or tuned so I am not using it)
  .250" refer tubing spaced at 2.50" at 19" angle
    6.75 turns
  12KV -at- .060A
  approximately .1875" spark gap (Four 2" copper couplings)
  .01uf rolled poly cap (25KV)  72 mil (12 6 mill sheets)

It produces continuous 12" to 17" arcs (measured point to
point)

First problem:
1) The only way I can get it to work well is if I connect
the inside turn of my primary to the secondary, otherwise
I get about 5" arcs jumping between the secondary and
primary coils an no output.

2) If I connect my toroid, I get no arcs, even with a bump.

3) I am not connecting any ground to the primary.  I thought
it was not 100% necessary, can anyone correct me? (Its
under construction.)

4) Is the arc output sound right? Should I be able to get
more or less output?

Any help would be greatly appreciated.

Thanks in advance!
Keith

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