Re: Variable capacitor

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

Original poster: "John Richardson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jprich-at-up-dot-net>

Chris,

That is almost exactly what I had envisioned!  (How did you do that?)  My
only question was what kind of dielectric would make this practical, and
from there I would assume that we could easily figure capacitance once we
have a dielectric constant to work with.  I'm gonna pick up an LCR meter
soon, and that should help with experimentation, and the winter months will
allow time to pursue some of  these ideas.  Mail me off list if you get the
time.

John Richardson

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, October 26, 2002 11:25 PM
Subject: Re: Variable capacitor


> Original poster: "cd by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<vbprg1-at-hotmail-dot-com>
>
> (back up an idea or so)
> How about this... its an extension of the copper tube inside
> a pvc tube inside a copper tube idea.
>
> A picture of my 3d model is better than a description
> though its not a great model....
>
> http://home.earthlink-dot-net/~cdowdy2/graphics/VCAP.jpg
>
> I figure you would need to fill the thing with transformer oil
> Different capacitances could be attained via inserting the
> the inner tubes with the crank on the top.
> Pvc could be used to isolate the larger diamter tube
> from the outer walls of the cap, as well as the other copper tubes
>
> In the model I joined the conductive tubes to thin conductive plates
> and then ran the leads out of the top, these could easily be
> rearanged to make acces to the top of the device safer
> as well as useing some non conductive material for the screw
> attached to the crank or a non conductive crank.
>
> Im not a ME or an EE so
> please tell me what you think
> Chris Dowdy
>
>
>