On Mon, 23 Jan 2006 14:36:51 GMT, "Dale Parfitt"
wrote:

Plan is to build a J antenna for 20 meters using 1 inch EMT conduit.
Antenna will be supported at the bottom by a 4x4 post in the ground and
at the 30+ foot level with a fiberglass bracket bolted to the eve of
the house. The upper most section will be a fiberglass 1/2 wl antenna
thta used to be used for CB. I am looking for a program that will allow
me to calculate deminsions for a project like this. Feedline will be 50
ohm coax.


Yes, I may I suggest you take a look at this one. You'll get two bands
instead of one.

http://k6mhe.com/files/DualBandVert.pdf

Danny, K6MHE




email: k6mheatarrldotnet
http://www.k6mhe.com/