Tony,
Sounds like an electric fence with a leakage or discharge path.
Any farms in the vicinity? How about someone with an electric fence
to control predators?
We have one here and it make the exact sound you describe when one of
the insulators on a fence post leaks.
Good hunting.
Don
N8DE
Quoting Tony <dxdx@optonline.net>:
> All,
>
> I have an RFI problem that I'm trying to identify. It's a continuous
> pulse noise that pops on every 1/2 second. The actual timing between
> each pulse is about 0.533 seconds and doesn't seem to change.
>
> It's spread accross all HF bands and on some days, it creeps up into the
> 100MHz range. It's stronger on the lower bands (80 meters) than on the
> upper HF frequencies.
>
> The signal is directional and can be nulled completely when not beaming
> in the direction of the source. The interference came on suddenly in
> December.
>
> I have a few recordings and would appreciate any suggestions. Apologies
> for the off-topic subject -- please reply direct.
>
> Tony -K2MO
>
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