I have a question, and probably I missed something already
posted that would explain it. I plead guilty to not reading
all the posts as carefully as I probably should.
Anyway, this morning I found myself again dealing with the
"Chinese radar" on 40 meter CW. This thing comes and goes.
It isn't there every day, but when it is there, it's loud!
Previously I have been able to pretty much eliminate this
interference just by engaging the noise blanker. This
morning, however, the noise blanker seemed to have very
little effect on it. I was able to eliminate some of the
problem using the manual notch, but when you do that, you
start creating problems with the CW signal you are trying to
copy. So, my question is, has there been a change in the
firmware updates that would have possibly reduced the noise
blanker's effect on this type of interference? Currently I
am using V. 1.75 firmware, as I decided not to update to
1.78 after hearing about some of the issues it created. I
suppose it could just be that the radar signal itself
varies, and that today it was such that the noise blanker
couldn't deal with it. I did try to go through all the
various settings for the noise blanker, but nothing seemed
to do any good. Also, I may be imagining this, but it does
seem that the noise blanker was better with the radar
problem when I initially got my K3, but has progressively
deteriorated somewhat. But today it went from dealing with
it very well (but not totally) on my last encounter, to
having no real effect today. Originally it seemed to wipe
out the radar interference almost totally.
Dave W7AQK
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