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RE: I need help with my crappy coil


To all:

This coil is not a good design and requires several major changes. It is a
good example of how the JHCTES Ver 3.0 TC computer program can show you how
to get about 34 inch sparks from a MOT transformer rated 2100 volts, 450 ma,
945 watts. The default design in the program is for a 15 KV, 60 ma, 900 watt
neon transformer. This is a typical coil that has been built by many coilers
and they have obtained streamer sparks up to 4 feet. The MOT transformer has
approximately the same wattage but would give less spark length because of
the lower voltage.

Only 3 changes would have to be made in the inputs of the program, 2100
volts, 450 ma, and a primary capacitor of about .02 uf. The program outputs
would then show you the necessary parameters to build a coil that would give
you much longer sparks.

The JHCTES Ver 3.0.7 will be available for free downloading in about a week.
Watch for more info on the Tesla List.

John H. Couture

--------------------------

-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, April 18, 2000 5:54 AM
To: tesla-at-pupman-dot-com
Subject: I need help with my crappy coil


Original Poster: "m0neyfromyuba" <m0neyfromyuba-at-netzero-dot-net>

I need some help my coil only makes one inch sparks

Transfomer: an MOT thats current limited to about 0.45 amps by a oven
heating coil.

Tank cap: MOT cap-2100 volts .7 microfarad

Spark gap: single gap 1/16 inch

primary: flat spiral 9.5 turns of 0.125 inch copper wire. outside diameter
is 7.5. and inside diameter is 2.5 inches.

Secondary: 9 by 1.5 inch secondary on a pvc. Total turns 656

This coil really sucks...i had to go with an MOT because i had no access to
a NST or an OBIT.  The circuit is the same as a standard tesla coil with
capacitor in series with the primary without any inductors or safety gap


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