RE:TC Secondary Voltage (was - 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> 


Dr. Resonance -

The TC secondary voltage equation is

   Secondary KV = 65 x (inches^0.7)

Streamers are usually about twice the length of continuous equal length
sparks. For your model M160 with an 84 inch streamer the continuous spark
length would be estimated to be 84/2 = 41 inches.

   Secondary KV = 65  x (41^0.7) = 875 KV

This may be too high. I would be interested in coilers sending me more data
so I can bring the equation up to date. Note that the equation is based on
65 volts per inch of spark.  KV = 65 x (one inch^0.7) = 65 KV
The question is should the 65 or the 0.7  or both be changed?

John Couture

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


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, March 15, 2004 10:04 AM
To: tesla-at-pupman-dot-com
Subject: Re: THOR: First observations on streamer formation (try II)


Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>


On one of the coils I gave you data for, model M-150, we obtained 7 ft.
streamers (7 kVA) in air with measured output at 763 kV when in DC pulsed
(single shot) mode.

I will take some more measurements this summer and supply this data to you.

I suspect your estimated voltage may be a bit high.  I would estimate around
450-500 kV.


Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
  >   >
  >   >
  >   > 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
  >
  >
  >