Hello from a new coiler.
From: Sulaiman Abdullah[SMTP:sulabd-at-hotmail-dot-com]
Sent: Monday, August 04, 1997 8:25 PM
Subject: Hello from a new coiler.
Hello Coilers !
I'm a virgin coiler just about to join you all.
I started winding my main coil before I was aware of the expertise
available here, so it's less than optimum and I'd like some help.
I've loads of questions so I'd really appreciate some help.
1 My coil is wound on a nominal 4" uPVC pipe
0.7mm magnet wire, 33 turns per inch
108mm actual winding diameter (4.25")
576mm actual winding length (22.67")
753 turns total
Heavily coated with polyurethane varnish
Warmed to 60 C (140 F) for one week to reduce moisture
Is this workable or do I REALLY need to start again with a larger
diameter former ?
2 I intend to use a Neon Transformer rated as follows:
Primary 240 v 1.9 A a.c. (Malaysian a.c. like U.K.)
Secondary 15 kV 30 mA a.c. centre-tapped.
The secondary measured at 21 k ohm.
I intend to make two 10 nF capacitors to use in series (0.005 uF).
What is the largest value capacitance I can use with the above
transformer WITHOUT cooking it ?
3 Could someone explain spark-gap quenching to me ?
I'd REALLY appreciate a photo, .gif, .jpg etc. or even a
description of waveforms and voltages.
4 I'd like to operate at low-frequency / high top-capacitance,
is it necessary to operate at the quarter-wavelength frequency ?
5 I just saw a photo in July's National Geographic of Christian
Ristow's 1.8 MV TC launching great bolts from what looks like the
last few turns spaced-out and strengthened, which brings me to my
Don't toroids and guard-rails form an effective shorted-turn ?
Thanks for your endurance reading this long e-mail !
I will really appreciate all your responses.
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