Re: Coiling problems

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


Primary coil is usually constructed from 1/4 inch refrigeration tubing.  Be
sure to use a "scrap wire" primary first, usually 20 to 26 turns, to
determine you optimum tuning point before building the copper tubing
primary.

Be sure to use a protection circuit between your NST and the primary spark
gap or you will blow your transformer.  Terry Fritz from this list can
provide you with an excellent protection circuit for your NST.

Be sure to sand and seal the PVC tubing with 3 coats of insulation before
winding.  You can use Glytal (electric motor rewind shop) or polyethylene to
seal the tube from moisture absorption.

You have to have capacitors in the circuit or it will not oscillate.  The 60
cycle current will not oscillate at a high enough frequency to drive your
air core resonance transformer.  Most of these NST powered transformers need
to oscillate in the 250 to 300 KHZ range.

A capacitor, spark gap, and primary coil are necessary to form the
oscillator circuit.  I would suggest a .02 MFD or .03 MFD, 30,000 Volt
capacitor.  It depends on the current rating of your NST(neon sign
transformer).

Best of luck with your coil project,


Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, January 04, 2004 9:27 AM
Subject: Coiling problems


 > Original poster: Nir Weingarten <nirzvi-at-yahoo-dot-com>
 >
 > Greetings all.
 >
 > If you have a good memory you will probably remember
 > my message from about six months. I asked for
 > instructions about the construction of a coiling jig
 > for my very first big size coil. Its now ready,
 > powered by man and not by motor as I intended at
 > first.
 > As this major step in my construction begins I am
 > faced with alot of embarrassing questions. This
 > questions are embarrassing because I ignored them in
 > my major plan, little details.
 >
 > My coil is a 90 cn. high PVC pipe seeled at both
 > edges.
 > Around the pipe there will be coiled 37. wire that
 > ends in a discharge terminal witch is a iron ball
 > about 5 cn. in radios. This coil has no capasitors and
 > a 15,000 neon light tansformer that is powered by my
 > 220 v. 50 hrz. home network.
 >
 > Here are some of the questions:
 >
 > - Should there be a restriction on the amount of laps
 > around the secondary coil?
 >
 > - What kind of wire should I use for the primary coil
 > (open wire, magnet wire...)?
 >
 > - where do I conect the Primary coil?
 >
 > - What in fact is a spark gap, what does it do, where
 > and how do I put it together?
 >
 > Your help will be of great assistance for me.
 >
 > Best wishes and happy holidays.
 > Nir (NOT NEAR) Weingarten
 > Israel
 >
 > =====
 >
 > Best wishes
 >
 >                                                Nir(NOT NEAR) Weingarten
 >
 > Israel
 >
 >
 >
 >