Rick's suggestion of using a 160M "T" as a voltage fed antenna on 80M worked
great for me at S9SS. In fact, one night the DX Summit spots were debating
whether I were real or a pirate because my 80M CW signal was so strong in the
US. By the way, some folks call that configuration an "inverted ground
plane."
I used an old DPDT relay from an AM band ATU to switch remotely between two
tuning networks, one for 160 and one for 80, located in a box out at the feed
point in the field. There are probably better ways to do it, but I just used a
resonant parallel RC circuit to get the large impedance transformation I needed
for 80M. I tapped the feed from the coax across a few turns at the cold end of
the coil. I could move between the CW band and the phone band on 80M by
walking out there and making a just a small change in the (marked) capacitor
setting.
73,
Charles Lewis - KY4P
ex A22AA, S92SS, SV0LM, S9SS
(and K4OVA long ago)
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