re: Non-Linear Coil Winding Experiment.

To: tesla-at-pupman-dot-com
Subject: re: Non-Linear Coil Winding Experiment.
From: Tesla List <mod1-at-pupman-dot-com>
Date: Sun, 19 Oct 1997 22:03:51 -0600 (MDT)
Approved: mod1-at-poodle.pupman-dot-com



---------- Forwarded message ----------
Date: Mon, 20 Oct 1997 01:07:00 +0000
From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: re: Non-Linear Coil Winding Experiment.

At 02:16 AM 10/19/97 +0000, you wrote:
>
>
>---------- Forwarded message ----------
>Date: Sat, 18 Oct 1997 17:13:32 -0600
>From: terryf-at-verinet-dot-com
>To: Tesla List <tesla-at-pupman-dot-com>
>Subject: re: Non-Linear Coil Winding Experiment.
>
>
>>Hello All,
>>        I agree that the resonant frequency of a loaded tuned circuit is in
>>fact sqrt(1/LC-(R/2L)**2).  The fact that resonant frequency is changing
>>substantially is probably explained by a combination of both changing
>>effective series resistance and distributed capacitance.
>>>>SNIP...<<<
>>Mark S. Rzeszotarski, Ph.D.
>>
>>
>
>        After using pencil, paper, and the work of a 248 year old
>mathematician named Laplace, I have found that Fo does indeed work out to
>sqrt(1/LC-(R/2L)**2) (rad/sec) when applied to the standard model of a Tesla
>coil. I learned something today  *:-)
>
---------------------------------------------------------

  Terry -

  You could have found that the resonant frequency was
                           Fr = (1/6.283)(sqrt((1/LC)-(R/2L)^2)
  in my Tesla Coil Construction Guide. But you would not have had the
satisfaction of learning the derivation. Note that if the R is large enough
it cancels out the 1/LC part and the circuit has  NO resonant frequency. The
R, however, must be very large which never occurs with Tesla coils.

  JHC
---------------------------------  Big snip