Re: V-27 tube coil: latest results

• To: tesla-at-pupman-dot-com
• Subject: Re: V-27 tube coil: latest results
• From: David Trimmell <davidt-at-pond-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 17 Dec 1999 17:10:24 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hello,

This is a interesting thing about CW (at least tube based, in my
experience), to get really high voltage (long sparks!) you must have a
sharp breakout point extending several inches from the coil, or coil and
top C. Now, I have obtained spark breakout from a "relatively" smooth
toroid, but only with extremely nasty kickbacks to the tubes (some sparking
between plates and filament/grid) or back to the transformer. I cannot see
any reason to use a toroid in a CW (tube) coil except for a corona shield
and/or to assist with tuning (I use it for both), only use a protruding
breakout point.

Question: So, why do we have such a different response with CW -vs-
Disruptive coils (spark gap...)? Any body ever try to determine the voltage
of CW coils? I doubt a spark length comparison with disruptive coils would
be very close...

Regards,

David Trimmell

At 11:22 AM 12/15/99 , you wrote:
>Original Poster: "Dr. John W. Gudenas" <jgudenas-at-admin.aurora.edu> 
>
>John
>very interesting work. Is there any top load
>on the coil? If not, do you think an arc would break out
>in the staccato mode with top load? I have loaded top capacitance
>(with one of your toroids) and adjusted the tank capacitance
>and can get my CW tube coil to intensely arc over to a ground but not
>break out to open air, however the RF field area is nasty.
>John W. G.
>
>John W. Gudenas, Ph.D.                       Aurora University
>Department Chair of Computational And Natural Sciences
>347 S. Gladstone,  Aurora, IL 60506    Tel# 630-844-5539
>-----Original Message-----
>From: Tesla List <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
>Date: Tuesday, December 14, 1999 9:00 PM
>Subject: Re: V-27 tube coil: latest results
>
>
>>Original Poster: FutureT-at-aol-dot-com 
>>
>>Hello coilers,
>>
>>The following describes my work in obtaining 24" tube coil sparks
>>from a small 3" by 12" secondary, using a lightweight level shifted
>>power supply for portability.  The pulsed staccato feature provides
>>added variety and interest to the spark output, and permits the coil
>>to give 24" sparks while running on a 120V, 15amp circuit.
>>
>BIG SNIP
>>Cheers,
>>John Freau
>>
>>
>>
>
>

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