08-25-2021, 09:02 PM
What is the situation with other AM radios being used in the same area? Try this with both a battery powered transistor and another plug in tube radio. Use the same outlet. Do they exhibit similar interference? If the plug in radio shows it, but the transistor one does not, the noise is on your home's power lines. If it is on both, the interference is in the air. If so, you are just another victim of the modern RF pollution. Welcome to the club.