"John Ferrell" wrote in message
I just did a quick simulation on EZNEC of your proposed Quad. At 215
mhz the element spacing on the boom is about 1 foot. That means a 4
element yagi or quad should come out to 3 feet long. Similarly, the
element loops will be about 1 foot square.

That sounds *exactly* like the one that we used in our training. The guy
who made it said that he used an antenna design calculator on the internet
to come up with the layout. I'm still awaiting plans from him, and in the
meantime I'm interested in seeing if I can do it myself for the technical
exercise.

If you are so inclined you could model this antenna with the Demo
version of EZNEC. You could also prototype one or more on the kitchen
table with masking tape and sticks!

I'm going to take a look at EZNEC and also google around for "Cubical Quad"
as suggested upthread by John KD5YI. So far this looks like exactly what
I'm looking for.

Thanks!