See:
https://www.nk7z.net/i-have-rfi-now-what-locating-it/
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 12/23/23 11:19, Frank W3LPL wrote:
Like all other RFI, the first steps are
1. turn off all AC power in your own home and turn off
all UPSes. If the noise disappears, you can use your
circuit breakers as a next step in isolating the RFI source
2. If that fails, use a small directional antenna and hand portable
radio to determine the location of the source
Guessing the source is rarely useful
73
Frank
W3LPL
----- Original Message -----
From: [email protected]
To: "Rfi List" <[email protected]>
Sent: Saturday, December 23, 2023 7:09:53 PM
Subject: [RFI] Sources of wideband hiss
Dear friends,
What are some sources of wideband hiss? I'm talking about an unstructured,
apparently unmodulated many-dB increase in the noise floor across the 2m
band* No associated birdies or other noticeable signals, just a nasty hiss.
I see it in the direction of high-voltage power lines 2km away and also
toward a couple of houses I just a few hundred meters distant. The
mechanisms of those sources are not necessarily the same of course. Ideas
welcome.
Best regards,
Michael
*I don't know whether it affects other HF or VHF bands.
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