Please Help Can't get rid of radio station.

Please help. I just finished with some upgrades to my system which included tearing everything apart to install a custom Billy Bags rack, upgrading my turntable fom the VPI HWmkIII to the mkIV, and installing a new Shelter 901 cartridge. I was just getting ready to listen to the new TT upgrades when I noticed one of the local oldies stations coming out of both speakers. My power is clean since it comes from a PS Audio Power Plant. I never had the problem before. Is there something wrong with the cartridge or it's connections? This radio station must have a broadcast tower nearby or is blasting mega-wattage since it can be tuned in on any radio in about 10 places on the dial. I live in a relatively rural area with no hills, so multipath is not the issue. Also, when I talk on the phone, I can hear the same station on the phone line. In the four years I've lived in this house, I've never heard the radio station coming from my system (unless I've deliberately tuned it in on the tuner). My tuner is turned off and I can hear the radio playing. I only hear the radio when the preamp is set to "phono". Does this have anything to do with using a low output moving coil? My prior cartridge was a high output model (2.0 mV) Could the new Billy Bags rack be the culprit? The old stand was a Skylan made of MDF. The Billy Bags is metal. Is it possible it is acting like an antenna?

Thanks for your help!