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Re: [RFI] New Unidentified Noise

To: rfi@contesting.com
Subject: Re: [RFI] New Unidentified Noise
From: "Dave Cole (NK7Z)" <dave@nk7z.net>
Date: Fri, 13 Jul 2018 22:00:27 -0700
List-post: <mailto:rfi@contesting.com>
Wild guess, and assuming it is on 7X24-- an Ethernet over power line device used in a home.

The ham band filtering is a characteristic of the Netgear brand of Ethernet over power line devices. Others may filter, but I know Netgear devices filter.

I located one a year of so ago, which is how I know about it. It was filtered for HF, but not VHF.

73s and thanks,
Dave
NK7Z
https://www.nk7z.net

On 07/13/2018 12:57 PM, Tony wrote:
All:

Noticed a new wide-band noise that seems to span from 12 MHz to 50 Mhz. The rapid pulse sounds sounds similar to car ignition RFI and appears to have a square wave pattern. I receded a video of the noise using an SDR Dongle and was wondering if someone might recognize it.

Video Link: https://www.youtube.com/watch?v=7WVyZFGdtKQ

The noise is coming from one direction and the device creating the noise seems to have ham-band filtering to some degree i.e., there's a lot more noise out of band than in-band on HF. It's a different matter on VHF though: it's pretty strong in-band on 50 MHz.

Any help would be appreciated.

Tony -K2MO

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