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Author Topic: RFI on all HF bands  (Read 9175 times)
W8JX
Member

Posts: 13163




Ignore
« Reply #15 on: December 16, 2015, 06:03:08 AM »

I placed a 102" whip on a mag mount yesterday, connected an ICOM 706 to it and drove around to see if we could find the RFI source. We used the hottest frequency from the QTH that was 18.189 MHz.
While driving in front of the local elementary school the noise jumped and sounded exactly like what I am hearing on my transceiver at my QTH.
It turns out it is the ATT distribution boxes. I could not tell if they added a Uverse node here, but it is highly probable that they did.
The interesting thing we noticed is the close proximity of the source to the power lines.
We suspected coupling to the power lines which is why other amateurs in the area 60+ miles away are picking this RFI up. Power lines can make for a great HF antenna.
FCC has been notified.

Wasting time expecting FCC to help. Best to talk nice to power company and get their help. Based on OP when i just read thread  I suspected power line noise but nobody hit on it for a while.
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--------------------------------------
Ham since 1969....  Old School 20wpm REAL Extra Class..
NK7Z
Member

Posts: 2303


WWW

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« Reply #16 on: December 16, 2015, 06:14:14 AM »

I placed a 102" whip on a mag mount yesterday, connected an ICOM 706 to it and drove around to see if we could find the RFI source. We used the hottest frequency from the QTH that was 18.189 MHz.
While driving in front of the local elementary school the noise jumped and sounded exactly like what I am hearing on my transceiver at my QTH.
It turns out it is the ATT distribution boxes. I could not tell if they added a Uverse node here, but it is highly probable that they did.
The interesting thing we noticed is the close proximity of the source to the power lines.
We suspected coupling to the power lines which is why other amateurs in the area 60+ miles away are picking this RFI up. Power lines can make for a great HF antenna.
FCC has been notified.
Involve the ARRL, call Mike Gruber at HQ.  The ARRL has a proven process for dealing with this.
Logged

Thanks,
Dave
Amateur Radio: RFI help, Reviews, Setup information, and more...
https://www.nk7z.net
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