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RE: Size dose matter
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- Subject: RE: Size dose matter
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sat, 29 Jan 2005 14:16:50 -0700
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Original poster: "Ken Jenkins" <thecompman@xxxxxxxxxxxx>
I'm looking for the longest sparks witch would be the largest
Physical size wouldn't it ??
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Saturday, January 29, 2005 11:19 AM
Subject: Re: Size dose matter
Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>
Do you ask in terms of secondary physical size, or probable overload, or
For conventional spark gap, non-magnifier coils, I would think that you want
the secondary height (including topload, etc.) to be no less than 1/2-1/3
the longest spark (otherwise you'll get too many top to bottom strikes)..
10 kVA -> using the Freau equation inches = 1.7*sqrt(watts)
that's 170 inches.. (call it 15 feet)..
You'll want a 5-6 foot high secondary for that, which implies a diameter
from 8-16 inches (because you don't want it too tall and skinny)
Bear in mind that a 10kVA pole transformer can put out substantially more
for short times (maybe 20 kVA? )... 20 foot sparks.. (however, you've got
to have the juice to drive that 20 kVA.. 80+ amps at 240.. Most homes these
days have a 200 A service, but boy, will the meter spin at that kind of
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Saturday, January 29, 2005 10:54 AM
Subject: Size dose matter
> Original poster: "Ken Jenkins" <thecompman@xxxxxxxxxxxx>
> Is there a way to know how large a coil you could run on a given size
> Power supply?? say how big can you go on a 10Kva source?
> Thanks for the help.
> Ken J