On 12/23/2011 10:52 AM, K7LXC@aol.com wrote:
Good advice Steve,
Thanks,
Tony
> > 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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