Thanks for the feedback. This is most certainly a buzz and not a hum. When the buzz stops, quickly after the needle touches the record, it usually is gone for good. Very, very rarely it buzzes for a split second during play, then disappears. But that makes me nervous to play anything too loud.
Due to my lack of understanding of how these turntable operate, I think I'll bring it in for a fix so I can get back to tearing into some Steely Dan, among others. My current favorite song to play on the turn table is actually a Robert Palmer song, "Every Kinda People." Love it.
I'm not sure if there is a dimmer switch. But I think Atmasphere is on to something.
Again, thanks.