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AF5HZ

Joined: Mon, Nov 5th 2012, 10:56 Roles: N/A Moderates: N/A

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RFI on 2 meters every ~300 kHz Aug 5th, 01:09 2 270 on 5/8/14

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RFI on 2 meters every ~300 kHz AF5HZ on 5/8/14
I'm curious if anybody recognizes this "signature". I've had what sounded like digital intermod on certain 2 meter frequencies for almost two years. I've been more concerned with getting my power line noise fixed (they're down to the last 4 poles to fix) and in the process I found the location of my "intermod", which isn't.

I won't have a spectrum anlayzer until later this week, but just from my base station the noise appears to be about 30 kHz wide about every 300 kHz. Typical frequencies are 144.49, 144.85, 145.7, etc. I don't know yet how far above and below the 2 meter band the noise goes.

I've narrowed it down to about 3 poles and/or 3 houses. The source is about 900 ft from my base, no houses between me and it. It's definitely at that location and is NOT within my house (confirmed with radio taken to that location). On my horizontal beam at my house, the noise varies from about S5 to S9+20.

After a heavy rain we had, the noise went away for about a week. This noise runs 24/7 from what I've noticed.

The area is served by Time Warner Cable and AT&T U-Verse. I don't know of any other broadband provider. I didn't find any references to this type of noise from these providers. But that isn't conclusive either way in my book.

I've found nothing in the literature/forums about this type of noise at this frequency, especaially this strong.

Has anybody ran into a similar situation?

Thanks.

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