so far the discussion has only treated the effect of trees in the immediate
near field area... what about the effect of wood in the Fresnel zone?
especially at low angles the ground reflected ray will surely be more
attenuated when passing through a relatively long space of dense wood than
hi Frank et al.
preparing our last year's CR3L contest activity in the CQWW-CW, we wanted to
try a remote RX-antenna to work in-band multipliers as DM6V in the
WAG-contest at DL5AXX's qth... naively following the formula that quartering
the frequency will half the attenuation Ulf ordered 500m
hello Paul,
I quite agree with Peter's (DJ7WW) advice, but instead of shortening the
ends I would first fold them (tightly) back and check the result...
overshooting can easily be corrected before finally cutting the wires...
success
Uli, DJ2YA
- Original Message -
From: paul ecker
hello Bob,
many thanks for the interesting tool calculating dipole dimensions.. it
would be even more useful if it considered insulated wires as well...
PVC-insulated wire can have an additional shortening effect of up to 5
percent (i.e. as much as about 7 ft. one either side on topband)...
