I put on KYW when I got up this morning, as I do almost every morning, only to find it completely unlistenable. I am in South Philadelphia and there is some horrible reverberating electrical interference blowing almost the entire AM band off the air. The only stations getting through are 610 and 990. I called KYW's news room and a pleasant fellow who answered the phone said he would report it to the engineer, but that they had no other calls. I tried multiple radios. Anyone else have this happen this morning? Any thoughts as to what would be strong enough to blow almost an entire band off the air? I've never seen this happen before.