I ran into a new noise here. It started on 15m through 40m on antennas
close to the house. The noise seemed to come on in the late afternoon
or evening. It was very evident when I turned the antenna toward the
house.
The noise almost sounded like an am signal in the noise. KOA radio with
50k watts is about 5 miles away so they can get into lots of things.
There were distinct mounds about every 20kcs and an overall hash on the
flex that took the noise floor from -120 to around -110.
The only thing in the house that I could think of are my fish tank
lights. I have 3 tanks all with the same light or similar style and
design. I pulled the plug and the noise is gone. I narrowed it down
to the tank that is in the shack.
The brand is Hygger and I bought it from Amazon. It is an led light
bar. I wrapped a number of turns through a snap on ferrite and plugged
it back in. So far so good! The cord is a wall wart that plugs into
the control unit which turns the light on, timer etc. 42 watts 215
led bulbs.
I can attempt to detail this further with recordings and screen shots if
needed.
I just thought I would pass this along.
Mike W0MU
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