Could it have been sun noise? Pritty often I get a lot of sun
noise on 10 an 15 mtr. Exspecially when sun comes up and goes
down when you will have help from the ground gain.
73, Jim SM2EKM
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>
> On Thu, 1 Apr 1999, Dick Green wrote:
>
> >
> > > I'll also throw in another note from ARRL DX CW, where the 7
element yagi
> > > at 120' was much better than the 5/5 or the low 7 element to JA
due to
> > > band noise. Both the 5/5 and the low 7 (both antennas having
> > > about the same average height) produced "crud" at about S-5 to
S-7 levels.
> > > Switching to the high antenna completely eliminated this noise.
A big
> > > difference.
> >
> > So, what was the source of the noise? Was it man-made electrical
stuff in
> > the JA direction, and the extra height put you above it, or was it
> > atmospheric noise coming from the direction at high angles? None
of the
> > above?
>
> LB was asking me the same question. I know it is propagated noise,
> because when the band closes, the noise goes away. It basically
sounds
> like I have a really hot pre-amp installed and the noise floor is S5
or
> more. It does not sound like man made noise.
>
> I do not always notice it, but when I do... it is always from a
western
> direction. I never notice the same affect to the east or northeast.
I
> also did not notice it in WPX SSB, but we didn't have an opening to
JA on
> 10 meters this weekend.
>
> Maybe some propagation expert or someone with more experience with
the
> radio can clue us in on the source.
>
> 73
>
> Bill Fisher, W4AN
>
>
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