RE: THOR: First observations on streamer formation (try II)

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

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


Peter -

I goofed. the equation should be

    Secondary KV = 65 x (inches^0.7)

The equation is for continuous sparks of equal length. I believe your sparks
refer to streamers which could be as much as two or more times the length of
continuous sparks of equal length. For your TC

    Secondary KV = 65 x (96/2)^0.7 = 976 KV

For 3200 watts and John Freau equation
    Spark inches = 1.7 x sqrt(watts)
                 = 1.7 x sqrt(3200) = 96 inches

The Secondary KV equation assumes your TC is producing 100 sparks per
second. This equation may have to be changed when coilers find a way to
determine the actual number of sparks per second a TC produces.

John Couture

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



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, March 14, 2004 12:47 AM
To: tesla-at-pupman-dot-com
Subject: Re: THOR: First observations on streamer formation (try II)


Original poster: "Peter Terren" <pterren1-at-iinet-dot-net.au>

For my coil with 96 inch sparks by your formula
      Sec voltage     = 65 x 96 ^ 0.7
                             = 65 x 24
                            =  1586 volts
This makes my TC a stepdown transformer! (The actual figure from inductance
or capacitance ratios should be 500,000 V)
I agree the formula needs to be updated. (I assume there was typo).
For my coil which runs at a high 1400BPS it should be:
      Sec Voltage    =  20000 x inches^0.7

Peter (Tesla Downunder)
http://tesladownunder.iinet-dot-net.au

  > Original poster: "John H. Couture" <couturejh-at-mgte-dot-com>
  > In the Tesla Coil Construction Guide there is a graph showing Voltage vs
  > Spark length. It is based on the equation
  >    Secondary voltage = 65 x inches^0.7
  > This is based on past coiler data and is for continuous sparks from the
  > toroid to a ground point. It appears to work OK but I would like to bring
it
  > up to date if it needs changing.
  > John Couture