A couple of comments on various posts. First off I mentioned that a loop is
about 1 dbi. When you take a dipole and bend it, you lose a little. So,
you are down slightly from a dipole. Also the M2 loops are not quite omni
directional. The Par loops, from what I am told, seem to be truly omni,
however.
The Par loops supposedly have a built in balun. I do not own a Par, so I
can't say for sure. The M2 loops seem to work better with a current balun. A
few beads of the appropriate grade of ferrite is all it takes.
The tuning on an M2 changes with the presence of a metal mast. Other than
that, I do not know if the mast affects pattern or gain. But, the tuning
definitely changes.
The tuning of M2 loops is affected by rain. Even M2 admits that. I paint
all my antennas with ZNCRO4 metal primer. That seems to be a big help. I am
told that the Pars are unaffected by water.
Buddy WB4OMG
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