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Re: [RFI] Broadband RFI on 10 meters

To: rfi@contesting.com
Subject: Re: [RFI] Broadband RFI on 10 meters
From: K9MA <k9ma@sdellington.us>
Date: Wed, 15 Oct 2025 21:05:35 -0500
List-post: <mailto:rfi@contesting.com>
At 02Z Oct. 16, the AM audio spectrum looks like this:




(Assuming the image gets through.)

It is much weaker than it was at 22Z, and I didn't hear the 1 kHz components then, but it is peaking in the same direction. The modulation frequency varies a bit.

I've seen something like this before, though I can't remember what it was: Broadband noise amplitude modulated at an audio frequency.

73,
Scott K9MA


On 10/15/2025 6:53 PM, Jim Brown wrote:
On 10/15/2025 3:14 PM, K9MA wrote:
Any idea what kind of source could cause this kind of RFI?

Can get a long time, wide frequency waterfall of the noise and email it to a few of us?

73, Jim K9YC

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--
Scott  K9MA

k9ma@sdellington.us
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