> From: Mark - AA6DX
> What a diff 6 feet make ... had a Wilson DB54 with 40 foot
> boom, just was not as hot ..
The Wilson DB54 was a dual band 20/15 (5 el/4 el) antenna. As
I recall the 20 meter elements were fairly evenly spaced to
provide "room" for the 15 meter elements. As I recall, the
Wilson antennas also used gamma matches that were not the best
If it were modeled using modern software, I suspect the 20 meter
section would be far from optimum and the 15 meter elements
introduce destructive interaction.
YO shows a relatively insignificant .5 dB increase in gain between
optimized 5 element designs on 40 and 46 foot booms.
... Joe, K4IK
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list