Gap losses, was electrode holders

["sundog" <sundog-at-xxxxxxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Hi all, David,

 Is there a website we all might find a picture of this unique gap?  It
sounds like a great idea, and I know where to obtain used grinders fairly
cheaply.

  I like the idea of running 2 discs, as your dissapation-per-gap will be
lower.  Gap spacing would be closer to keep the firing voltage consistant
and sane.

  A question on gap losses, would the multiple gaps affect gap losses any?
Terry and others have shown that more gaps tend to quench better than a
single gap (lower dissapation per gap would decrease temp rise and local
ionisation, keeping a more consistant firing voltage vs a 2 electrode gap
where most of the losses are burned off in a single hotter spark.

 A question on quenching, also.  On the first notch, the primary dumps a
goodly chunk of energy into the secondary, which resonates and makes a HV
spike.  I assume the presence of a streamer affects quenching by depleting
the energy in the secondary.  If the coil does not break out, or the
streamer load isn't that great (just a streamer, not a strike to an object),
more energy would be available to push back into the primary, inhibiting
quenching, right?
											Caio
												Sundog
-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, November 16, 2000 10:05 AM
To: tesla-at-pupman-dot-com
Subject: Re: RSG electrode holders?


Original poster: Tesla729-at-cs-dot-com

In a message dated 11/15/00 8:23:55 PM Pacific Standard Time,
tesla-at-pupman-dot-com writes:

<<   GPO3 or G-10 fiberglass-epoxy discs are the ultimate in rotaries,
 but not necessary for low powered systems.   >>

Hi Sundog,

Just to add my $.02, I use two 3/8" X 10" dia. Lexan rotory disc
attached to each end of a modified bench grinder motor in my
10 kVA coil system. Each disc has six equadistantly spaced
3/8" X 2" long threaded brass rods for rotory electrodes. This set-
up works great for me and I see little excessive heating of the ro-
tories.

Sparking in Memphis,
David Rieben