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RE: Spark Gap question



Original poster: "Ted Rosenberg by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Ted.Rosenberg-at-radioshack-dot-com>

Jeff: I don't mean to muddy the water so to speak but there is no rule that
you must use the circular arrangement for sweat couplings.
Depending on the power of your coil, there is flexibility.
For example, last year I built my first coil. 900 watts using one 15/60.
I used 9 copper tubes, each 1.75" diam and 2.5 long in a linear arrangement.
The gaps between were set to .028 as I recall for a total gappage of .224. A
photo can be seen at http://www.flash-dot-net/~ford29/tesla/TTL_close.jpg and
http://www.flash-dot-net/~ford29/tesla/TTL_SG.jpg
I ran that coil many hours during October 2000 and the tubes never needed a
fan and never even got warm!
There are no absolutes in coil deign, merely variations on absolutes.
Hope this helps.

Safety First

Ted

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, September 25, 2001 9:10 PM
To: tesla-at-pupman-dot-com
Subject: Spark Gap question


Original poster: "Johnson, Jeffrey D -at- PWC by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jeffrey.d.johnson-at-l-3com-dot-com>

This question is regarding the famous RQ/TCBOR gap.  I've read that you
should use 1.5" copper pipe and figure on 1000 V per gap.  If I'm running a
15kV NST that means I need 2 to 3 six gap assemblies in series.  Can't I
just use 1" pipe and put 15 2" pieces inside a 6" section of PVC?  

JJ