RE: Getting the bugs out- a little help, please...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "John H. Couture" <couturejh-at-mgte-dot-com> 


Bart, All -

Why worry about a random spark length with a random energy input? Until
coilers are able to identify the true energy input for a particular random
extra long spark length the comparing of Tesla coils by their random sparks
is purely guess work. At present all coilers spark length estimates will
have to be taken with a grain of salt.

  To make engineering sense a coiler would have to determine the true input
energy or joules for a certain random spark (of a group) and that at present
is impossible to measure or at least has never been done. Even the
controlled spark and watts input would only do a fair job for comparing a
classical TC with a magnifier.

John Couture

--------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, November 12, 2003 12:09 AM
To: tesla-at-pupman-dot-com
Subject: Re: Getting the bugs out- a little help, please...


Original poster: Bart Anderson <classi6-at-classictesla-dot-com>

My data shows 162" (13.5 ft) identified in a photograph as longest spark.
Richard stated it was 10kva (volt/amps reading). He may have indeed hit 15
foot sparks at some point, but I'm certain it was greater than 10kva and
probably in the range John mentioned.

Take care,
Bart

Tesla list wrote:

 >Original poster: "Chris the great" <downnessisgoingup-at-hotmail-dot-com>
 >I believe he only used 9kVA to get those 15 footers.....all in all it was
 >a very nice coil.
 >
 >
 >
 >
 >>From: "Tesla list" <tesla-at-pupman-dot-com>
 >>To: tesla-at-pupman-dot-com
 >>Subject: Re: Getting the bugs out- a little help, please... Date: Mon, 10
 >>Nov 2003 21:06:22 -0700
 >>
 >>Original poster: FutureT-at-aol-dot-com
 >>
 >>In a message dated 11/10/03 8:18:30 PM Eastern Standard Time,
 >>tesla-at-pupman-dot-com writes:
 >>
 >>David,
 >>
 >>Well Richard Hull used approximately that cap value for
 >>his Nemesis coil which used a 10kVA, 10kV piggie.
 >>He used 11 to 13kVA or so and got about 15 foot sparks.
 >>He ran at about 450 bps non-sync.  I agree that the phasing
 >>won't be too critical at your 480 bps.  I would think your
 >>piggie has the power to charge those caps pretty
 >>well at 480 bps.  You could certainly compare the performance
 >>at 240 bps and see what happens.
 >>
 >>John
 >>
 >>>There are a couple of problems that I encountered
 >>>though. First, my Wysock-built rotory gap is sync at
 >>>480 bps and w/ .0825 uFD primary capacitance, I'm
 >>>thinking that's a little too fast for the capacitor to ever
 >>>be able to fully charge before discharging across the
 >>>SG and that would definitely limit my sec. voltage gain.
 >>>I haven't built a Freau phase adjuster yet either as I'm
 >>>not sure that the phase angle would even be that big
 >>>of an issue at 480 bps. I'm thinking about removing
 >>>4 of the 8 rotory electrodes to go for 240 bps. Maybe
 >>>some of you you more mathematically inclined mem-
 >>>bers can tell me what the best bps rate range should
 >>>be for this coil. My power supply is a 10 kVA, 14400
 >>>volt PDT controlled through (2) paralleled 1256 variacs
 >>>(up to 280 volts -at- 56 amps) and ballasted w/ a seriesed
 >>>225 amp arc welder w/ the welding leads shorted. It just
 >>>seems that I ought to be able get brighter,longer, more
 >>>powerful sparks w/ my available power. Of course, like I
 >>>said, I just roughly tuned it in tonight.
 >>