RE: Foil wound pancake secondaries.

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

Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com> 

Hi Finn:

I think the turn-to-turn capacitance would hinder performance.
Experience shows that big top loads are good for performance.  Having a
lot of C, without the intervening secondary inductance to limit current
to a discharge, makes for good sparks.  I think if having a larger
percentage of C distributed in the secondary would be detrimental.

Gary Lau
MA, USA

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, September 24, 2003 7:46 PM
To: tesla-at-pupman-dot-com
Subject: Foil wound pancake secondaries.

Original poster: Finn Hammer <f-h-at-c.dk>

all,


At the scrap yard, I came across a nice roll of 2 thou. thick 1 inch
wide copper strip,(0.05mm*25mm) and so a nice foil wound pancake
secondary would be possible to make.
I imagine that oil impregnated paper from cash registers would do as
insulation. Even with 2thou thick insulation it is possible to make a
1000 turns coil that is only 8 inches (200mm)in diametre.
Drive it from the H.bridge and get some interesting results.

I`m not sure I understand this right, but I imagine that the turn to
turn capacitance will be much greater in a coil like this, if so, how
will it affect the performance of the coil.

Cheers, Finn Hammer