[Elecraft] Origin of Signal-Fine Structures in SSB Pass Band Waterfall, mainly 80/40m

[Jim Brown]

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