RE: Quarter Wavelength Frequency

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

Original poster: "Robert Heidlebaugh" <rheidlebaugh-at-desertgate-dot-com> 

Garry. R : A number of reactant effects change the velocity. The distributed
capacitance has the greatest effect, but not the only effect. 12% lower
velocity is quite common around a wire.
     Robert   H

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, July 25, 2004 5:51 PM
To: tesla-at-pupman-dot-com
Subject: Re: Quarter Wavelength Frequency


Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>

Hi Paul,

There is one other variable that I would find interesting.  Does the
velocity factor depend on the number of turns for a given H/D ratio?  Maybe
your data says no but I'm not sure.

Gerry R.

  > Original poster: "Paul Nicholson" <paul-at-abelian.demon.co.uk>
  >
  > The interesting thing is that these coils all have a variety of
  > turns and pitches, yet they all land within a narrow range of
  > one another when h/d is plotted against velocity factor.
  >
  > This implies that we can get a good estimate for Fres by simply
  > taking the free space quarterwave frequency for the straight wire
  > and then multiplying by the corresponding velocity factor for
  > the given h/d.
  >
<snip>