According to EZNEC+, an 80m dipole at 100 feet (resonant and matched at
3.7 MHz) has a 2:1 SWR bandwidth from 3.55 MHz to 3.87 MHz with #10
copper wire and from 3.57 MHz to 3.86 MHz with #18 copper wire. Much
thicker conductors or similar conductors at higher frequencies would
make more difference of course (I've modeled 12 inch diameter wire cages
for 80m and they make a usable improvement in bandwidth), but in spite
of what somebody just posted the advantage for #10 wire on 80m does not
seem significant to me for bandwidth.
73,
Dave AB7E
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