Hum is caused by AC voltage.? How does AC get into a 12VDC system?? Maybe it's generated by the brake controller, but my guess is that you had the converter plugged into 120VAC and the 60Hz ripple was getting into the brake magnet current.?
John
---In alinerchaleta-frames@..., <jackoduc@...> wrote :
Why is there a humming coming from inside the
brake drum?
