On 4/5/2024 12:59 PM, Robert Strickland via Elecraft wrote:
The screen shot of the noise is posted on QRZ.com. This link will get you there.

https://forums.qrz.com/index.php?threads/noise-reduction-resources.908913/

The thin vertical lines look like they're coming from some piece of electronics with a stable clock. The humps of noise around 21050 and above 21060 look like two different switch-mode power supplies.

A wider span and longer time waterfall are more useful for classifying the type of thing generating noise. Study the applications note in the link below.

http://k9yc.com/KillingReceiveNoise.pdf

73, Jim K9YC
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