Well what is puzzling is that it only does it on 40 and 80 meters ssb,
20,15,10 meters works fine...BUT when hooked up into a dummy
load(Cantenna),Radio works fine too.I run other radios on my 40 and 80
meter antenna and they also work fine.Just the Omni-d has a issue with
my 40 and 80 meter antenna...
Mike
Dr. Gerald N. Johnson wrote:
On Fri, 2008-04-18 at 11:58 -0400, Mike wrote:
Hi Guys
I Have a Omni-D Series B Transceiver,When I use the radio on 40 and 75
meters SSB.I tune antenna to Flat match,And when I talk the Swr Jumps up
to 1.3 and 1.5 reflected,On dead key carrier I can get get my antenna to
go flat match.It only does this when I talk.I've already changed all the
1N-4048 diodes on the swr board and fixed a low receive problem, and I'm
running the drive at 2 to 2 1/2.Any Ideas on how to tame this problem???
Tnx Mike
Could be you are driving the PA a lot harder on voice than with the tune
up carrier and making harmonics that are reflected by the tuner showing
the voice level dependent SWR. Either that or parasitic oscillations in
the PA...
73, Jerry, K0CQ
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