Re: About to begin anew..
Subject: Re: About to begin anew..
From: mark.graalman-at-mediccom.norden1-dot-com (Mark Graalman)
Date: Wed, 18 Jan 1995 21:16:00 -0500
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Resent-Date: Thu, 19 Jan 1995 01:15:07 -0500
NTAC> Hello all!
NTAC> I am about to begin begin my 7th Tesla-coil. After reading this list
NTAC> for awhile, and seeing all of the new insights manifested here, I
NTAC> would like this coil to be the very best so far. All of my designs in
NTAC> the past used the old methods, and while I get good results, I can't
NTAC> say that I've ever gotten the _great_ results all of you write about.
NTAC> With all of this in mind, here is what I have to work with:
NTAC> 2) 15 kV 60 mA neon transformers for 15 kV -at- 120 mA input
NTAC> 1) 0.02 microF 120 kV military surplus capacitor
NTAC> 1) roll of 1/4 inch (.635 cm.) copper tubing for the primary
NTAC> 8) 18 inch x 1/8 inch (46 cm. x 3 mm) Aluminum plates for a series
NTAC> quenched gap
NTAC> 1) roll of 24-gauge magnet-wire, polyurethane and polyamide coated
NTAC> 1) PVC pipe, 10 inches (25.4 cm) in diameter, and 43 inches (109 cm)
NTAC> long 1) 12 inch (30.5 cm) non-magnetic, stainless-steel discharge
NTAC> electrode (This is shaped like a toroid with plates on the top and
NTAC> bottom, or like a dough-nut without the hole. It is very smooth,
NTAC> with a very gradual curve to it. It's about 4 inches (10 cm.)
NTAC> thick. It is hollow, btw)
MG> I think the 10" dia. form is too big for your power level, but even
more so, too big for #24 ga. wire. I would make the secondary winding
20" long and 6" in diameter for #24 wire.
NTAC> I have always spaced the wire turns in all of the larger coils, but
NTAC> now I read that this may not be necessary. I even biult a kind of lathe
NTAC> that cuts threads in the forms in the desired spacing. Should I junk
NTAC> this machine?
MG> I don't know if I'd junk it, but I would'nt use it for winding coils.
NTAC> If any one of you had this same equipment and wanted to build a coil,
NTAC> what special considerations would you take?
MG> Proper secondary form preparations, Forced air series spark gap.
MG> I'm abit concerned about your capacitor, it may not be good for Tesla
coil work if it has a high internal inductance, I would try running a Q test
on the capacitor. It may not be designed for High pulse current service.
Mark Graalman TCBA #1399
NTAC> I'm not a novice, so don't hold back on vocabulary :)
NTAC> Thanks in advance for any advice!
NTAC> Dan Kline <klineda-at-univscvm.csd.scarolina.edu>
... Alias, Mark the spark
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