Re: top load height

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gary Peterson" <g.peterson@xxxxxxxxxxxx>

Scott wrote:
> . . . is there any rule of thumb for determining the proper height 
> of your top load (toroids) from the top windings of your secondary?

The rule of thumb for the height of the elevated terminal of a Tesla 
coil RF transmitter is 1.5 times the height of the helical resonator 
with the height-to-diameter ratio being approximately 
9.15:1.  Increasing the height-to-diameter ratio allows the spacing 
between the top turn and the terminal to be reduced, eventually 
reaching the point where the resonator is "extended up to the 
terminal." [APPARATUS FOR TRANSMITTING ELECTRICAL ENERGY, Jan. 18, 
1902, U.S. Patent 1,119,732, Dec. 1, 1914; see 
http://www.tfcbooks.com/patents/tower.htm ]

Regards,
Gary Peterson

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, March 31, 2007 10:58 PM
Subject: top load height


> Original poster: "Scott Bogard" <teslas-intern@xxxxxxxxxxx>
>
> Hi everybody,
>     A quick question, is there any rule of thumb for determining 
> the proper height of your top load (toroids) from the top windings 
> of your secondary?
> It seems to make a differance in performance, but is there a way to 
> determine the optimum height (other than by sheer experimentation of 
> course!).  Thanks.
> Scott Bogard