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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