I had the same problem (do a search in Audiogon). I was able to stop the radio station by using shielded interconnects, ferrite clamps and switching phono stages. This was a very annoying problem for me and I was close to giving up on vinyl all together and switching to digital. Good luck.
Phono stage picking up radio signals?
The strangest thing happened this evening. I just hooked up my Whest phono stage and as I was letting it warm up I turned up the volume slightly to check the noise level and noticed a strange noise coming from the speakers. At first I thought it was a ground loop hum or some feedback, but when I put my ear to the speaker I distinctly heard music. I turned up the volume a bit and to my surprise I could hear and identify the song playing, followed shortly after by DJ banter. It was obvious I was picking up a radio station, but I don't have a tuner or any other radio device in the home. Can anyone give me a clue as to what might be going on.