On Thu,12/10/2015 7:33 AM, n...@comcast.net wrote:
I don't have room to run even a full 1/2 wave dipole for 80m, or a lot of
wires, but the OCF dimensions (45'/90') fit in to my lot with a bit of
zig-zagging.
I had a similar issue on my Chicago city lot. My solution was a loaded
dipole for 80M that also resonated on 40M. You can buy antennas like
this here.
http://www.hypowerantenna.com/products/dipoles Look at the 2B4080L
As others have noted, the major advantages are 1) predictable pattern 2)
fed with coax, so they can be choked to kill common mode feedline
current. Common mode feedline current makes a noisy antenna and puts RF
in the shack.
I've used the 160/80 M version of this antenna very successfully in
three locations, adding a 40M fan element to cover that band.
Barry's antennas are well designed, but their construction is a bit
light weight for high stress applications (like 150 ft up in tall trees
that sway in the wind). They're fine for lower stress installations. For
the antennas I've built based on his designs, I've bought the loading
coils and built the rest. His standard design was more than strong
enough for my Chicago installation at about 40 ft between fixed points
(not trees).
73, Jim K9YC
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