Loud hum from my Sangean radio completely fixed! (High quality radio.) I'm thrilled. My new Schwinn 810 treadmill was producing a moderate to loud hum on many radio stations, both AM and FM. Initially, I only used the Tripp-Lite Isobar surge protector (see photo) because it has noise cancellers. (It MUST be an isobar silencer.) This reduced the hum by about 30%. I then attached 4 ferrite bead noise cancellers (13mm diameter) to the power cord next to the treadmill. It does not matter. I ended…