Jumping in with both feet?
From: SBJohnston-at-aol-dot-com [SMTP:SBJohnston-at-aol-dot-com]
Sent: Thursday, January 29, 1998 12:36 PM
Subject: Re: Jumping in with both feet?
D.C. Cox wrote:
>One problem -- you are overcoupled. Your primary should be
> in a flat expanding spiral for the primary not 2/3 the way
>up the sec coil. This will also lead to flashovers from
>primary to sec coil which may damage the magnet wire.
The primary is not 2/3 the way up the secondary... the cold end of the
secondary sticks 2/3 of the way into the primary. The coils are spaced at
least 5-1/2" apart all the way around, and it is the cold end of the
I'm not sure I understand the advantage of a flat sprial primary -- can you
>You may also want to switch to a larger top electrode
>such as a 20 x 5 inch toroid for better electrostatic control
>and higher output potential. Drive current necessary is
>120-150 ma at 10-12 kV for this type of performance.
If I wish to add a toroidal top-load/discharge terminal i can see it will
shift the resonance of the secondary, but why will it required greater drive?
Thanks for the info!