40 mil LDPE and 5kv Transformers?
From: richard hull [SMTP:rhull-at-richmond.infi-dot-net]
Sent: Sunday, April 12, 1998 5:26 AM
To: Tesla List
Subject: Re: 40 mil LDPE and 5kv Transformers?
At 11:58 PM 4/9/98 -0500, you wrote:
>From: Joshua Resnick [SMTP:seraphim-at-WPI.EDU]
>Sent: Thursday, April 09, 1998 1:21 PM
>To: 'Tesla List'
>Subject: Fwd: 40 mil LDPE and 5kv Transformers?
>I have two H&R's in series with my coil. My cap is 9 layers of 6mil poly
>per dialectric sheet. The cap is an interleaved flat plate type. I would
>not recommend using one 40 mil layer. When coupled to a larger cap, between
>.08uf and .1uf, the transformers have a resonant rise. This rise can be
>detrimental,I really think that one 40mil layer is just below the safety
>margin. You want this rise effect because it helps the gap to break down at
>the lower H&R voltages. I found that the best gap is a vacuum quenched RQ
>gap with close spacings between the pipes. My cap is .12uf and at full
>power (140v) variac input to the H&R's with 6 series gaps, the pipes need
>to be set just less than an eigth of an inch apart. Don't let this bother
>you, the H&R trannies really perform despite what has been said about them.
>My coil produces 5' sparks and runs at 77kHz. Just go all the way on the
>cap and make it BIG.
> /\/\ ((____)) /\/\/\/\ Joshua Resnick
> / | | \ \ http://www.glubco-dot-com/weaponry
> / | | \/\/\ \ __ http://ece.wpi.edu/~seraphim
>/ ____| |____ \ - One Room - One Dream -
> ||||||||||||||||||||||| \ - One Million Volts -
This is correct! I would never make a high value... > .02ufd capacitor out
of a single layer of anything or a single capacitor!!!!!!! under .015ufd a
single layer of dielectric is just great up to 10KV input, especially in a
well made flat plate design.
It is important to realize the level of current involved. A .12ufd cap is
close to what Tesla used on his big 50' system in Colorado!!!!!!!(.156ufd).
I personally feel this is an outrageously large capacitor to place in a
Tesla system, but if you are stuck with low volts and can't buy a decent
capacitor of the pulse type then that is all there is to it.
Richard Hull, TCBOR