On Fri, 2009-06-05 at 10:12 -0400, Justin Pinnix wrote:
How hard is it to reproduce the Elk in a homebrew? It's a log perioidic and all of the "build your own" articles I've found on the web are for yagis. Are the log periodic's dimensions more critical?
Log periodics are somewhat fiddly.
What about building a pair of yagis ( http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf) and mounting them on the same boom? That would eliminate the need for a diplexer, depending on how you were planning to hook it up.
Well that's what I built - a WA5VJB for 2m and one for 70cm (3-ele and 5-ele) and an HB9ABX diplexer. It works pretty well, but the antenna is fiddly to tune.
I recommend tuning up each antenna separately, then fitting the diplexer and tuning that.
Gordon