Re: Capacitor "tap" in Primary?

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

Original poster: "D.C. Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <DR.RESONANCE-at-next-wave-dot-net>


Spark gap losses can be reduced considerably by connecting a .002 cap
directly across the spark gap.  This, discovered in the 1930's, is know as
the Poulson Principle.  It was a neat trick used by early radio spark gap
pioneers.

Regards,

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, June 26, 2002 7:25 AM
Subject: Capacitor "tap" in Primary?


> Original poster: "Jolyon Vater Cox by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
>
>
> Capacitor "tap" in primary?
>
> Has anyone had experience of using a capacitor tap instead of a tapped
inductor
> in the primary tank circuit of a Tesla coil -with the spark gap connected
> directly across one or other of the capacitors?
>
> The reason? To allow the charging of a high value capacitor to a
relatively low
> sparking voltage with a relatively high current in order to reduce the
recharge
> time between firing of the gap. The second capacitor would be of equal to
or
> smaller value than the first so that at resonance the RF voltage across
the
> ends of the primary would be higher that the voltage across the gap.
>
> The system might be compared with a pi-tank or the tuned circuit of a
Colpitts
> oscillator (without the associated parts).
>
> Would this work or would energy simply be wasted in the spark gap?
>
>
>
>