[gregb]

I have found in my house that any flourescent light almost anywhere in the house will cause this issue as well as touch lamps. They cause not so much a hum as a static thats seems to extend right across the broadcast band. When I built my work bench and radio room I did install fluorescent lights throughout except over the repair bench I installed standard incandecent lighting and when testing I shutoff the fluorescents and have no issues.

Gregb