Here's an older one destined to be dismantled today and so I thought I'd post some pictures. LM3875, no hum, heats up like a cigar lighter, though, if the cover is shut .
Hey, thanks for the responses!!! This amp was really just a way to use the cigar box. I never intended to run it for real - just have a little fun - the heatsink was one I had on my desk at the time I was drilling holes into the box.