Re: Water absorbtion of Gray PVC

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

Original poster: Ed Phillips <evp-at-pacbell-dot-net> 

 >  > results with ease as you boost its inductance, wiresize and
 >  > capacitance and lower its frequency. That is the approach I took with
 >  > that coil and it worked well. For the record, the secondary is 10"
 >  > diameter, about 4' high, has a loathed helical primary and produces
 >  > strong hot 5' discharges with just a kW or so of input.
 >  >
 >  > Malcolm"
 >  >
 >  >  Please give more details on your loathed primary!  Do you hate it
 >  >  that
 >  > much?  How much power is "just a kW or so"?
 >  > Ed
 >
 > Oh, definitely not loathed by me - mainly some others on the list ;)
 > It works jolly well. There is a trick however and since someone asked
 > for a guideline on primary size vs secondary size, here is a guide
 > for this type of primary: height about 8% the height of the
 > secondary, bottom turn at the same height as the bottom turn of the
 > secondary, and diameter about 2.5x the diameter of the secondary. The
 > coupling constant was originally about 0.12 but increased somewhat
 > when I added another turn to bring it from 3 to 4 which increased its
 > inductance by about 50% to match some extra topload I added to the
 > secondary. Power draw varies considerably depending on whether the
 > streamers are attached or not from about 800W (air) to around 1.3kW
 > (attached). I still think I haven't achieved optimum results with
 > this coil and transformer but since it no longer belongs to me, I'm
 > done with modifying it. I plan to build better one of about the same
 > size for home use.
 >
 > Malcolm

	Sounds pretty awesome to me!!!  Congratulations.

Ed