Problem is that AM radios today are garbage. Easy answer is to get the radio as far from the pump as possible. Other option is a C. Crane radio.I have interference on the (don't laugh) AM band on my radio when running my Variable Speed Pump and wondered if anyone else has had this problem and fixed it.
The radio is over 50 feet from the pump and the pump is grounded internally and externally.
I do and I still have several cars that do it on a portable bluetooth speaker. The cars are 90 years old and do not have radios in them so sometimes we will bring a speaker along to have music.Anyone remember when the ignition systems of cars would interfere with its AM radio? Bad ignition lead or worn generator brushes would drown out weak AM radio stations. Sparking creates static on AM frequencies which is concerning for a modern motor. Modern electronics should not be generating AM interference.