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Re: [RFI] RFI Source - looking for clues\help

To: rfi@contesting.com
Subject: Re: [RFI] RFI Source - looking for clues\help
From: Brad Denison <brad.denison@gmail.com>
Date: Fri, 1 Jan 2021 21:17:23 -0500
List-post: <mailto:rfi@contesting.com>
No new motor driven equipment and the noise was still present when the
house was powered down.



>I have some general RFI location tips at my web site, www.nk7z.net...
>Whateverr it is, I bet it has a motor in it... You didn't by chance get a new 
>HVAC did you?

>73, and thanks,
>Dave (NK7Z)
>https://www.nk7z.net <https://www.nk7z.net/>
>ARRL Volunteer Examiner
>ARRL Technical Specialist, RFI
>ARRL Asst. Director, NW Division, Technical Resources

On 1/1/21 5:30 PM, Brad Denison wrote:

Well, 2020/2021 transition is starting off poor with some new RFI killing
my SE directional RX antennas.  From this direction I am hearing a broad
hash with a "musical whine" .  It seems to be a fairly consistent on/off
cycle, however, I have noticed the cycle duration change depending on the
day.
Would appreciate any insight if anyone has experienced anything similar.
To date I have done a full house power down test and also walked the area
with a small AM handheld (which does not hear anything locally).


A picture of the RFI is here:  http://bit.ly/3hwzwUg

Short cycle audio here:  http://bit.ly/34ZtbeS

And longer cycle audio here:  http://bit.ly/3hE3TYP

Hoping to stir up some help or suggestions.


HNY,

Brad W1NT
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