Re: 5MV, 312kW

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

Hi Finn, (and Terry Fritz),

Sounds like the Bertha coil in Oklahoma except, I think, it is powered by
49KVA

Terry,  I think you mentioned a worlds record Spark length with a coil in
California.  Could you comment on what you know about it??  Power input,
design, length of spark, owner, etc.

Gerry R.
Ft. Collins, CO


 > Original poster: Finn Hammer <f-h-at-c.dk>
 >
 > All,
 >
 > To arrive at 5MV on the top, the toroid has to be the right shape and size
 > to suppress breakout at lesser voltages.
 > It _could_ look like this in INCA:
 > * 5MVtoroid
 >
 > Lcenter terminal 20 0 2 1.17 2
 > Cedge terminal 20 2 2 0.83 0 180
 > Cedge terminal 20 2 2 0.83 0 -180
 >
 > and would then be :
 > Minor diametre: 1.66 metre (65")
 > Major diametre: 5.00 metre (196")
 > Chip in with 250pF of topload and
 >   3125 Joules of energy........
 >
 > Running the coil below it, at 100BPS, would require 312.5kW
 >
 > Let`s be bold, without being utterly rediculous, and charge the primary
 > capacitor to 50kV, it will then have to be 2.5µF
 >
 > Pairing this cap up in a tank with a primary coil that has 2 turns,
 > starting at 70" diametre, 10" spacing and 15.6µH will make it ring at
25kHz.
 >
 > All we need is a secondary that is 50" in diametre, 250"long wound at 3
 > turns per inch.
 >
 > Assuming 2nd. notch quench, and a coupling of 0.122, the energy will be
 > transferred after 13 cycles/break, or a total of 0.052secs/sec. Ringing at
 > 5.2% of the time, there should be ample time to charge the cap btwn.
bangs.
 >
 > I`ve used INCA, ballpark numbers, and wintesla (Yeah, that`s right: the
 > reg`d copy), for this brief design exercise which untill someone points
out
 > an order of magnitude error, suggests that a 5MV coil is not at all that
 > unrealistic, not being concerned with the aspect of funding.
 >
 > Cheers, Finn Hammer
 >