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Jack, ham radio is a hobby for me, too. Please keep up your
experiments and post anything you care to share. As a renter,
magnetic loops interest me, and *your* experiments will improve
the probability of *my success*.
On 6/1/2019 9:16 PM, Jack Purdum via
Good grief, guys, this is a hobby for me. Allison, are you
really trying to be helpful here, or simply showing that you
have a lot of RF experience? Perhaps the best solution
is to do no testing and simply say we made contacts with it
and leave it at that. Pretty hard to criticize the
methodology when there's no information given. We have an EFHW
available to us for testing, so that's what we're using. Also,
there are a lot of hams out there using EFHW antennas so any
testing we do with it will have meaning to them even if it
does have a crappy radiation pattern for testing. If it's not
ideal, so be it. My chances of renting two fiberglass crafts
to sit on the Great Salt Lake loaded with a boat-load of
equipment and antennas are about zero. Someone else with
deeper pockets than I have will have to do that testing.
The good news is that if we do write an article on our ML
experience, no one has to read it.
On Saturday, June 1, 2019, 4:17:30 PM EDT,
the biggest issue is the 80-10 EFHW has a terrible
pattern, broadside at 80m and by 20M
its a 4 lobe pattern with 10m its practically endfire.
That creates issues and questions for comparison as the
EFHW is then rarely aimed at
the receiving station and hence you do not have a known
Generally when testing loops a loop of known performance
are used but testing at HF is
never easy as the near field is at least 5 to 10
wavelengths or more and ground quality
dependent. You want that distance to be able to see the
total field. The easiest rig
for that kind of testing is two fiberglass boats on calm
salt water (an almost near
perfect ground plane). Of course that does not
include RF sources and calibrated
receivers and accurate GPS.