My new RipNAS is causing radio frequency interference - specifically with a radio tuned to AM 621 (the radio is about 4m from the RipNAS).

Unfortunately this is causing some "WAF" (Wife Acceptance Factor) issues as that's the frequency to which my partner listens. The solution for the moment is the RipNAS can't be left on all the time, which means I can't just fire up my music at the drop of a hat.

Is this RF noise normal, and is there anything that can be done to alleviate it?