Re: 833 coil

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

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com> 




>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: 833 coil
>Date: Sat, 27 Sep 2003 17:18:45 -0600
>
>Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
>
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Saturday, September 27, 2003 12:07 PM
>Subject: Re: 833 coil
>
>
> > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
> >
> > Notice that the Q of the coil overall will change drastically from using 1
> > tube to using 2 tubes!  In order to truly optimize a single tube coil, you
> > must redesign the tank parameters...likely using a higher impedance.
>
>Without giving it any thought, I would think that you need a lower plate
>load impedance, since you've got two tubes in parallel, each one taking half
>the load?  I would also assume that the plate C is doubled...

I think youve misread me.  A single tube will need a higher impedance tank 
to keep the power draw (the power processed by the tube) lower than with 
having 2 tubes in parallel.  What you stated is correct for using 2 tubes 
rather than one.  Plate C is not necessarily doubled though, it gets a bit 
more complicated than that...stuff i dont quite understand.  But i think 
you can do 1.41X the capacitance or so for going from 1 tube to 2 tubes and 
maintaining a similar load impedance per tube.  Though, dont count on what 
i just said, i simply seem to remember someone telling me that.

_