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Re: [RFI] "Marker RFI"

To: rfi@contesting.com
Subject: Re: [RFI] "Marker RFI"
From: Chuck Gooden <Chuck.Gooden@comcast.net>
Date: Sat, 22 Aug 2020 16:27:50 -0500
List-post: <mailto:rfi@contesting.com>
When you find it let me know because I have something very similar.  I have S-7 across the 40 meters and below.  It is significantly reduced above ~8.5 Mhz

Have not had much luck finding it though.

Chuck K9LC

On 8/22/2020 3:21 PM, N4ZR wrote:
Here's an odd one.  I seem to have a new emitter in the neighborhood.  It puts out a broad, T7, rough-but-steady tone just below 50 KHz increments (7000, 7050, etc.) .  It is loudest on 40M - about S4 - but audible from 80M up, and varies with which antenna I'm using. It peaks due east on 20M on my tribander, and the difference between the zero-beat frequency of the "carrier" and the 50-KHz intervals on my K3 diminishes with frequency, which suggests the possibility of harmonic origin of some sort.  I can also see it very clearly on my Red Pitaya 122-16 SDR spectrum display with the K3 off.

Any idea what I should be looking for?

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