[Elecraft] K3 Birdies
David Gilbert
xdavid at cis-broadband.com
Fri Feb 20 20:21:29 EST 2009
The software fix works extremely well. I haven't found a single birdie
yet that I couldn't handle. Done properly, they go completely away.
I'm curious, though ... did adding the KRX3 accentuate the birdies
compared with how it was before you added it?
I built my K3 and installed the KRX3 all at once before I checked for
birdies so I don't have a comparison, but I have suspected that there
are stronger birdies with the KRX3 than without it. The most obvious
reason would be the additional TMP cables, but I'm not sure that's the
culprit. I half suspect that the shield of the KRX3 (which does an
excellent job for the KRX3) couples signals to the main receiver. I
used a wide flat blade screwdriver to short the shield of the KRX3
shield to the case while monitoring the birdies, and I found that the
birdies were VERY sensitive to where on the KRX3 shield I did that.
It's possible that the screwdriver blade was acting as sort of an
antenna, but I doubt it since the birdies always decreased in strength
when I found the right spot ... I never found a spot where the birdies
increased in strength as a result of my playing with the screwdriver.
73,
Dave AB7E
Robert Dorchuck wrote:
> I recently installed the KRX3 and seem to have some of the birdie problems
> others have noted, the loudest on 14.186.7 (S3). The others are masked
> when connected to an antenna and are not a problem.
>
> I have tried adjusting the cables and saw some improvement but it will
> not be a solution as Wayne noted. Has anyone tried the test firmware
> that Wayne mentioned a week or so ago?
>
> Thanks all,
> Bob W6VY
>
>
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