Depending on the case ground loop can show as 50 / 60 Hz hum or 100 / 120 Hz buzz.
Also 150 / 180 Hz and 300 / 360 Hz fundamentals or components are well possible (especially when you have amplifier racks and/or light dimmers powered from three phase power in your system).
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1 Comment
Tomi Engdahl says:
Depending on the case ground loop can show as 50 / 60 Hz hum or 100 / 120 Hz buzz.
Also 150 / 180 Hz and 300 / 360 Hz fundamentals or components are well possible (especially when you have amplifier racks and/or light dimmers powered from three phase power in your system).