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, wall-warts, etc),
and digital signals from monitors, computers, routers, coffee makers,
washing machines, (seems everything that plugs in these days has
microprocessors), LED lighting, etc. can all cause interference like this.
You are entirely correct about this being the primary cause of all of us
being varying degrees of deaf. See my tutorial on chasing noise to build
contest scores at k9yc.com/publish.htm
73, Jim K9YC
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