[RFI] Sources of wideband hiss
Dave (NK7Z)
dave at nk7z.net
Sat Dec 23 21:41:17 EST 2023
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: nlsa at nlsa.com
> To: "Rfi List" <rfi at contesting.com>
> 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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