I would think adding radials would lower the Radiation resistance. Also,
the SWR curve should narrow as ground losses are reduced; since the effect
of ground loss resistance swamping the results lessens.
At some point I suggest, as others, that you get on for the contest and see
what you can do. If you can run a bit of power, it will help. Receiving
is indeed the tough nut to crack on 160 Meters.
Elevated radials may be worth a shot. I think Mike uses two with good
results. I went to a K2AV FCP and it works good enough for my needs. Even
with a K9AY loop system receiving is still my weak point.
Get on for the contests and have some fun.
Pete
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