I'm looking at putting up some wire yagis for 15M, 20M, and possibly 40M
over my spring break, and I'm looking for some suggestions. Here are my
questions:
How many emements are people using, and if only 2 elements, are you
using a director or reflector. Is it direction switchable?
How is the antenna suspended, between two supports, single support with
a boom and like an inverted V? If you are using a boom, how are you
connecting the wire to the boom?
What wire guage are you using, or are you using a wire cage?
How is the antenna fed?
What is the element spacing?
Hare there any multiband wire yagi's out there? like 15/20M on single
"boom"? How are they fed? Interactions between elements?
I appreciate your input, and I will summarize for the reflector. I have
no antenna modelign software on my computer at present, or I would model
some designs. I'm really looking for proven designs and field
experience.
Just for reference, these beams will be pointed just north of east at
eu/af. I'm not looking for real sharp patterns, but maybe 2 element
antennas that will provide some gain without too narrow a beamwidth. I
am not overly concerned with F/B ratio. I have a freestanding crankup
tower I could use to mount them on at about 50 feet that has inverted
v's for 80M and a tribander at 70 feet, or I can get them up in the
trees between 35-50 feet. The ground under the antennas slopes down
towards europe/africa for about 1 mile, a drop of 200-300 feet.
Thanks in advance. Please reply direct and I will summarize for the
reflector.
--
Al, KE1FO, ex. KE6BER mailto:ke1fo@contesting.com or ke6ber@tiac.net
Check out my web page, http://www.tiac.net/users/ke6ber for summaries
from the contest reflector and a growing list of amateur radio links.
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