[TowerTalk] Vertcal Dipole

[Bill Tippett <btippett@alum.mit.edu>]

Hi George,

On 17 Oct 2004 at 21:27, Bill Tippett wrote:

> It is purely resistive at resonance

K6GT wrote:

Isn't everything?  What I mean is, isn't that the definition of
resonance in this sort of application?  Or is there another
definition I should know?

        At resonance, X is not necessarily zero in R + jX...it is
only at a minimum.  From the MFJ manual (W8JI's words I believe):

"RESONANT FREQUENCY is where reactance is zero ohms, or in some
cases as close to zero ohms as the MFJ-259B indicates."

My shunt-fed tower for 160m is an example of the latter.  The
MFJ never indicates zero reactance...I simply tune the series
C for the minimum (which is very low but not zero).

                                        73,  Bill  W4ZV



_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk