I've been using a new pair of U87's for a while without problem. But since I've started using them in the big studio room wich is on the top floor, I've started recieving radio in the mic's. And only in the U87's. I've tried the best cables (short) disconnecting the electricity in that part of the building but nothing works. Has anyone had this problem? It's driving me mad and valuble time is lost. I've send a request for help to the technicians at Neumann but have'nt recived an answer yet. There is an antenna for TV on the roof, but should'nt that be possible? Please advice.