[RTTY] Fan dipole question

[Bill Turner]

ORIGINAL MESSAGE:

On Thu, 21 Feb 2008 18:13:43 -0500 (Eastern Standard Time), "Lee
Ratcliff" <lratcliff at isp.com> wrote:

>I was thinking about letting about 25 feet of the 160m section dangle, and
>coiled up in free space.  How much would this mess up the 160m performace?

------------ REPLY FOLLOWS ------------

Letting it dangle in a straight line is ok, but coiling it up is not.
You will be in effect adding an inductor at the point where you start
the coiling and that will change the resonant frequency significantly.
Coils are often added to an antenna to make them electrically longer,
but never at the very end of the wires.

You can model the anenna's performance with a program such as EZNEC to
see exactly what will happen. http://www.eznec.com/

73, Bill W6WRT