Re: Conventional Sparking
From: Alan Sharp[SMTP:100624.504-at-CompuServe.COM]
Sent: Friday, July 18, 1997 3:00 PM
Subject: Re: Conventional Sparking
Thanks to all those who responded to my request for
info on the World War II capacitors. I was able to
get 20 in the end - all he had, at a discount, and I'll
try them soon.
Meanwhile I've got my first conventional coil running.
I can draw 10" sparks of it. I'm using a 5500V 330mA
transformer with a 0.02uF capacitor - which limits
the amount of power I can usefully process.
It fired first go and the performance doubled on tuning.
The transformer isn't current limited, so I'm using
a 2.5kW convector heater in series to keep it in
rein - I know I'm loosing voltage :(
I built it around an existing 4" coil (about 1000 turns
of 0.4mm wire) with a 9 turn pancake primary.
Tuning and setting the safety gaps (one across the
transformer and one across the caps) was straight
forward after a year on this list.
I hope to tweak a bit more out of it - add capacitance,
rewire the variac to get to 110% Widen the gaps.....
Best of all the church slows done at this time of
year and I've got a student assistant for the summer.
I should get a bit more done.
Alan Sharp (UK)