> This has become a real mystery folks. I checked the SWR on my 3 element
Steppir today and found that it behaved the SAME as my 5 element 20M
mono band Yagi, i.e., the SWR increases after keying down for a few
minutes and returns to normal after waiting a few seconds. This happened
with all bands on the SteppIR. The antennas are mounted on the same
tower about 12ft apart so I always retract the Steppir elements when
using the 20M mono bander to avoid interaction.
The first thing you should do is to measure the swr with an antenna
analyzer at the antenna feedpoint. Everything else is just complicating your
problem. Then work your way back to find where the culprit is. With 2
antennas exhibiting similar problems, it probably isn't the antenna that's the
problem.
MOST "antenna" problems I've ever encountered were something other
than the antenna; e.g. bad jumper, bad switch, bad meter, etc. The problems
were cured in the shack but the diagnosis started at the feedpoint.
Cheers,
Steve K7LXC
TOWER TECH -
Professional tower services for hams
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