[Elecraft] antenna farm

[Byron Servies]

On Dec 14, 2009, at 12:45 PM, Geoffrey Mackenzie-Kennedy wrote:

> While planning your antenna farm, have you considered using an antenna 
> modelling program such as EZNEC which could be of great help to you. A free 
> version comes with the ARRL Antenna Handbook.

This is the approach I am taking, though I ended up buying EZNEC+ as I have a lot of architectural metal in my 3-story town home over the Santa Cruz small craft harbor.  The first story is also stucco, which has a bunch of wire in it as well, as are the other nearby homes in my complex.

My goals are to try and determine why the placement of my current wire dipoles is so poor, and then to see if I can model something that will have theoretically better performance before I go through the effort of constructing and hanging my next low-visibility antenna(s).

So far, just looking at the plots as I add more of the large bits of metal in my home  to the model has been instructive.

Byron KI6NUL
p.s.  One of the first things in the EZNEC instructions is a word from the author about how amateurs with limited space often wonder why their 3 antennas do not work well, and he points out they really have 1 antenna with 3 feed points due to their spacing.