Re: Capacitance of a long thin rod (e.g. a spark) (fwd)

---------- Forwarded message ----------
Date: Fri, 17 Jul 1998 18:51:48 -0600
From: terryf-at-verinet-dot-com
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Capacitance of a long thin rod (e.g. a spark) (fwd)

At 10:09 AM 7/17/98 -0600, you wrote:
>From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
>To: Tesla List <tesla-at-pupman-dot-com>
>Subject: Re: Capacitance of a long thin rod (e.g. a spark) (fwd)
>  Jim -
>  If the capacitance of the TC secondary is changed by the streamers
>wouldn't this put the system out of tune and stop the streamers?
>  Richard Hull said it was an extreme change implying much more than 5%. He
>did not say how he measured the frequencies with and without streamers under
>high voltage operating conditions.
>  John Couture

Hi John,
        Once the system quenches, the secondary system can shift frequency
all it wants.  There is no longer a need for the primary and secondary to be
in tune once the gap quench isolates them.  A frequency shift would probably
help quenching??  In fact, if the coupling is high, primary to secondary
tuning becomes somewhat insensitive anyway.  This is why they can just add a
turn to the primary without hurting the overall tuning.  Coils with low
primary to secondry coupling are much more sensitive to tuning than higher K
coils systems. 

        Terry Fritz