, Cu, vy 73 de Andy
HB9CVQ, DK2VQ, AK4IG
https://www.qrz.com/db/HB9CVQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
On Behalf Of Chris
Sent: Saturday, January 6, 2024 6:54 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Origin of Signal-Fine Structures in SSB Pass
On 1/6/2024 4:05 PM, Dave (NK7Z) wrote:
I have some articles on this subject at:
Dave's stuff is excellent.
I'm also an EMC professional, long time Vice-Chair of the EMC WG of the
Standards Committee of the Audio Engineering Society, principal author
of most of our EMC Standards. And I've
On 1/6/2024 9:54 AM, Chris wrote:
Digital signals (square waves, waveforms with sharp edges) have very
high spectral content (_many_ harmonics), so you may see many lines at
constant frequency spacing all over the HF spectrum and beyond.
Switching power supplies (inside electronic devices,
Hi Chris,
I have some articles on this subject at:
https://www.nk7z.net/category/info/rfi-mitigation/
I would recommend the one on using an SDR, as an RFI site survey tool as
a starting point for our friend.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL
.
Tnx, Cu, vy 73 de Andy
HB9CVQ, DK2VQ, AK4IG
https://www.qrz.com/db/HB9CVQ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Chris
Sent: Saturday, January 6, 2024 6:54 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Origin of Signal-Fine Structures in SSB
Hello Andy:
I will offer some experience and opinion
Your note implies that the interference is coming from the ionosphere,
and you may be correct, but it is also worth considering that you may be
looking at digital-based interference from local devices (in addition to
possible distant
I have a general question to better understand analysis of SSB ( RX Pass
Band) signals displayed as waterfall, mainly on RX of night time/evening low
bands (80m/40m) propagation.
(Sorry up to now no waterfall screenshots available yet. Anomality is only
sometimes occurring, but not very short
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