Concur on suspecting cables as first step for most problems. Also
suspect the meter that measures the signal/voltage/current/etc. Or
other items in the line.
I ran into a similar issue using an antenna tuner on 2m. I had just
put up a 11-element yagi (not real high but equivalent to the
vertical previously used). I could hardly hear my neighbor on 2m-SSB
only 15 miles away. More interestingly he reported my signal as
low...hmm. I switched back to the vertical and signals in both
direction jumped up in strength...double hmm!
OK the yagi had not been in service for a couple years and I was
unable to make any tests before it was put up on another tower. SWR
was close to marginal so I inserted my 2m antenna tuner and that
fixed the SWR. I checked power on each side of the tuner and it was
about the same ( a little lower on output). Soooo I removed the
tuner and power indicated went from 110w to 100w but the signal
jumped in both directions. Note to self: "leave this tuner on the
dusty shelf".
The SWR is about 1.8 without and tuner but the 100w amplifier is
happy (no fold back) and signal are much better on both ends of the
circuit (S0 jumped to S3). Guess that tuner is very lossy
(MFJ-921). Of course MFJ means "mighty fine junk" <smile>
73, Ed - KL7UW
http://www.kl7uw.com
Dubus-NA Business mail:
[email protected]
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