Variable Frequency Drive for a larger factory fan

[chy_farm]

Interesting view on scope ,my comment was due to my own small project building a tracer ,had issues with noise on the scope till I changed the build over to PCB,and proper BNC plugs.
I am certainly not up to your level of tinkering but enjoy the improvement to the welder and the current project keep em coming

Hi Trigger, as far the “noiseless” active prove for an oscilloscope, today I shot a pic of it. Posting it here for you.

Hope this will help you a bit.