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Re: text of july 1964 popular electronics article on tesla coils (fwd)



---------- Forwarded message ----------
Date: Fri, 28 Feb 1997 20:14:31 -0600 (CST)
From: kcravens <kcravens-at-sound-dot-net>
To: Tesla List <mod1-at-pupman-dot-com>
Subject: Re: text of july 1964 popular electronics article on tesla  coils (fwd)

At 08:58 PM 2/27/97 -0700, you wrote:
>
>
>---------- Forwarded message ----------
>Date: Thu, 27 Feb 97 07:13:56 UT
>From: William Noble <William_B_Noble-at-msn-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: text of july 1964 popular electronics article on tesla coils
>
>I have scanned the article in this magazine called "big TC" - there is another 
>called "little tc" that I didn't bother with (uses a tube and a small coil) - 
>I have tiff pictures of the pages and of the cover, and a word for windows 97 
>OCR'ed version with all the graphics in it. I'm posting just the text because 
>I don't know if the list server can handle attachments, and anyway, I don't 
>want to upload 130K for the article unless there is interest.  I have tried 
>building this coil and as far as I can tell it doesn't work - see a posting 
>called "first coil experiments" for details on this.
>
>************the article, ASCII only******************
>
>A quarter of a million volts ? All it
>takes Is a transformer, a capacitor,
>a spark gap, and Tesla's  famous coil
>By CHARLES CARING LLA, W6NJV
>TESLA COILS have fascinated experimenters ever since...

Say! I have that mag too... That was my first attempt at a Tesla Coil... I
ended up with about 8 of the glass/foil caps (paralleled) and changed the
stock primary to a bit heftier 1/4" copper tubing... It made really bright
purple corona, and if I drew the spark to me, it was a solid thick purple
arc about (max) 15". Used a 12k 30ma neon, and a single bolt to bolt
spark-gap. (didn't know better then) ..and also, as I recall, the secondary
was grounded to the primary ground too.(no dedicated rf gnd) I don't do that
any more. Now I use the poly/alum in oil caps, and although the arcs are
much longer, they're no longer purple, and tend to be like all jagged. I
really miss that thick smooth purple arc.. would the different caps be what
caused the smooth arc to be all jagged and thin? or maybe because the pri.
and sec. "shared" a common ground?  I got no way to measure the freq of the
coil, or inductance, or anything, really. (i did measure the caps with a
borrowed meter) they were all 4 very close to plan -at- approx .0166 to .0171 

 ken "coilin' w/o meters" cravens
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    Kenneth J. Cravens
    kcravens-at-sound-dot-net
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