[TowerTalk] Beverage Antenna

[Jim Brown]

On Mon,2/2/2015 10:05 AM, Don wrote:
> First, I'm surprised there does not seem to be any published 
> measurements taken at a common test site of a Beverage at various 
> heights and lengths (such as done with yagi's, and other antennas on 
> test ranges). 

Why do you assume that nothing like this exists? Beverages have been 
around for nearly a century, and it is quite likely that there's a lot 
of published work that you haven't looked for in scientific journals. 
It's also possible to model antennas like this and do your own study. 
There's a lot about Beverages (and other RX antennas) in the ON4UN book, 
and in the ARRL Antenna Book.

Email reflectors like this one should not be a substitute for pulling 
out the books and studying them. Many of us who post answers to 
questions like this have done that study, or done that modeling, or 
built those antennas, and are sharing what we've learned. As VE7RF has 
noted, optimum height is a function of wavelength. When a Beverage is 
higher than that, it doesn't stop working, like throwing a switch, it 
just becomes less effective. My 550 ft Beverages, a full wavelength on 
160M, at an average height of 5-6 ft, are quite effective on 40M, and 
are still working on 20M! How do I know? I run diversity with my K3 
using the TX dipole at 125 ft into the main RX and the Beverage into the 
second RX.

73, Jim K9YC