Subject: APPROPRIATE CAP...?
From: richard.quick-at-slug-dot-org (Richard Quick)
Date: Mon, 30 Jan 1995 21:28:00 GMT
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* Originally By: Klineda-at-univscvm.csd.scar
* Originally To: Richard Quick
* Originally Re: APPROPRIATE CAP...?
* Original Area: UUCPE-Mail
* Forwarded by : Blue Wave v2.12
Date: Mon, 30 Jan 95 09:10:24 EST
From: Dan Kline <KLINEDA-at-UNIVSCVM.CSD.SCAROLINA.EDU>
Subject: Appropriate Cap...?
To: Richard Quick <RICHARD.QUICK-at-SLUG.ST-LOUIS.MO.US>
I wanted to ask you this personally, so please excuse me for writing
uninvited, ok? (I just didn't want to take up Tesla-list bandwidth
I don't have the best of memories, but it seems to me that back in '87,
'88, or '89, someone named Richard Quick sent a letter to Popular Elect-
ronics or Radio Electronics with a picture of what he called "a medium-
sized coil." There was a white band around the secondary that was "used
for measurement purposes only", and the picture had been taken outside
and the scenery looked western. If this was you, I think that maybe you
can give me some advice about whether or not I'm going to have to build
a capacitor or not.
It seems that the capacitor-bank used on that coil was made up of exactly
the same type of capacitor I want to use on my next coil. The kind I'm
"speaking" of had heavy aluminum end-plates, the body is covered with
brown kraft-type paper, the capacitance was .02 microF, and the voltage
rating was 120 kV. I got it from Fair Radio Sales a few years ago.
Does this ring a bell? I could very easily have the wrong person. It's so
easy to program one's own memories. I looked all over for that magazine,
but I couldn't find it.
Anyway, if you are familiar with that particular capacitor, can you tell
me of the appropriateness of it's use for a Tesla-coil? Will it work ok?
It has in the past, but only in the old-style configurations. I will be
doing new style on this next coil, which is why I'm asking about this
Thanks for any info!
Also while I've got you here, :) I had a very small system that ran on
270 W, with glass cap bank, and cylindrical primary. The secondary was
3.5 inches dia. and 12 inches tall. I could get about a 7-8 inch spark
out of it. Not too bad for a small system. Then I took your advice...
First, I pounded a 5 foot, copper pipe into the ground and connected it
to the system with 6-gauge stranded wire, rubber covered.
I put 450 W into the system, made a toroid, added turns to the primary,
retuned and fired it up. I was getting double forked sparks about 16
inches long! I was totally amazed right up until the secondary burned up!
:) I had wound on PVC with only polyurethane top-coats, using 24-gauge
wire. Also, the primary was only 8" in diameter. The next coil will
incorporate your designs and should be fairly spectacular! You really
know what you are talking about!
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