I want to run a "stack" of two 6el 6M yagis, one at 60 ft and one at 30 ft.
Using a StackMatch to switch A/B/A+B, I can cover all radiation elevation
angles between 3 degrees and 15 degrees within about 3 dB, according to my
YT model.
Problem is, I don't have a suitable tower setup to accomplish this with a
single rotator. I'm wondering if I can get away with using two separate
supports, displaced horizontally by perhaps 30 or 40 feet -- one yagi on top
of a 55 ft crank-up tower at 60 ft, the other on top of a roof mast at 30
ft. I would then synchronize the Yaesu rotators in some way. Haven't really
thought about that yet, but it's probably not difficult.
Though I can't model this configuration with YT, it seems like it might
produce gain results in the A+B mode similar to having them stacked one
above the other (~2 dB according to my YT model). But what about the
radiation angle? Would I still get the same take-off angle characteristics
of a vertical stack?
Bill / W5WVO
Albuquerque, NM
_______________________________________________
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
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|