I installed a 40 meters Cushcraft 40-2CD 2 elem. yagi on a 125 foot tower by
May 2nd.
On first few days it sounded like a dream. Noise was around S3 and no
interference whatsoever.
Some days after installation, I noticed that I could hear a 3KHz bandwidth
noise every 24 KHz on the entire HF band, night or day time (24 hours a day).
Strongest noise was around 6,8 to 7,1 MHz despite antenna or radio. ( I also
performed some tests with a Sony portable radio ICF-7600GR set for LSB)
On the next weekend, when I came back home, the interference was gone. For 18
days in a row no intereference showed up. Everything was pretty good.
Ten days ago, it came back and it is a S-7 to S-9 depending where the antenna
points to.
I decided to go for a walk around the block and noticed that the noise
is either on the power lines and/or cable telephones. It starts 100 feet before
and 200 feet after my house main gate.
When scannning from 1MHz to 30MHz, it peaks around 6,8 to 7 MHz.
If there's anyone on this list that can help me, please, do so!
I appreciate your help!
Best regards,
Luciano PT9KK
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