My K3 was on 40M and for 6 QSOs on 10M from K1RX. We initially had
an interstation interference problem with the 80M station. It was
causing pops and strange behavior with the AGC. We tried to manage
it with antenna orientation and judicious frequency use, but it
didn't seem to help. I checked out the AGC settings on the K3 and
found that the AGC PLS menu item was set to OFF. I changed it to
NOR, which by virtue of the label should have been the normal
setting. Not sure how that got set to off, but it made a huge
difference. Checking the manual, it was to enable (or actually
disable) the AGC from acting on impulse noise. These impulses were
coming from 80M and affecting 40M. (We later changed out the 80M amp
which probably was causing some of the problem.) The situation
became much better after this change, however, the first few hours of
the contest had a lower than expected rate on 40M. We started out as
M/2 (switched to MM after we didn't want to deal with the band change
limit) so we just went to another band more than we should have.
At 2/18/2008 06:16 AM, GW0ETF wrote:
My K3 #145 was used casually in ARRL DX this weekend. One thing that really
impressed me was when an extremely strong carrier appeared on top of K1TTT
just as I was about to call - and stayed there. I turned on the manual notch
and tuned it onto the carrier and lo and behold K1TTT re-appeared and was
worked. Obviously not *exactly* on the same frequency but near enough to
prevent any copy even with the 250Hz roofing filter in and DSP right down
to 50Hz; the notch on the K3 is so sharp it's almost unbelievable.
73,
Stewart Rolfe, GW0ETF
g4zfe wrote:
>
> Pleased to work a few other K3s in the ARRL DX contest. I was very
> surprised after answering VE3EY's 40m CQ that he came back telling me
> that my K3 sounded nice! Thank you Nick! Great Elecraft commaradie...
>
> The K3 was superb during the contest especially on 40m with 300 Hz
> DSP. I am still very impressed by the strong signal handling. I was
> only running 100W to a stealth (1mm DX-Wire) 40/80m trapped Inverted L
> at 24 feet.
>
> The K3 mojo is alive. I was pleased to work VP6DX on 40m CW on Sunday
> using my stealth setup. Great operators there (with great radios).
>
> 73 de Rich, G4ZFE
>
> K3 #128
>
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