how can I fix mains hum?

try moving the radio to another location,the hum is most likely caused by interfearance from another electrical device.or is the radio too close the mains socket.

mech monster
November 2011

mains hum could be down to a capacitor, which would normally smooth the ripple, could have a bad connection on 1 in the power section, check the larger ones first. Should not need to fit larger anything, they are all designed correctly, and the cct well tested. So fault rather than design.

SD
November 2011