On 12/14/2020 9:44 AM, donovanf@erols.com wrote:
Bill's excellent: "You can never have too many antennas!"
For 160M contests, N6RO patches many components of his extensive antenna
farm to the operating desk for use as RX antennas.
is often quoted with my important corollary:
"unless they interfere with each other"
which they all too often do...
Yes. When I added a 120 ft tower and sloping wire 160 verticals to it
about ten years ago, N6BV and NI6T each told me in separate
conversations that I should look for interactions with the tower, those
sloping wires, and an existing Tee vertical about 200 ft away. I had
already discovered the interaction between the Tee and coax feedlines to
my high dipoles, and added ferrite chokes to suppress it.
I spent much of a summer studying those interactions in NEC, discovering
that if I terminated unused feedlines for the 160 antennas, I could make
the Tee a reflector for the sloping wires and the sloping wires plus the
tower a reflector for the Tee, yielding me about 2 dB switchable to EU,
JA, and to the south.
73, Jim K9YC
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