Hi all,
A long long time ago, I made an amplifier using two of these modules. Since I made it in my yoof, I'm quite attached to it. Recently though, my wife bashed her head on the underside of the shelf it was on. There followed loads of crackling from the speakers accompanied by the disturbing hum of power rails coupled directly to speakers. I sprang up and flew across the room to switch the amp off (which wasn't easy since I had to be careful to avoid my wife who was now rolling around on the floor, clutching her head) but I was too late and the left channel was toast.
I'm a bit mystified as to how the head-bashing could have caused any damage but, aside from that, repairs are progressing and new bits are on order; I only lost two of the output transistors, some resistors and a couple of polystyrene caps. The only problem I'm expecting is how to set up the quiescent current, since I can't find the original instructions for the modules.
I know it's a bit of a long shot, but does anyone here happen to have a set of instructions hanging around? I think it was quite a popular module for quite a long time. The order code was HQ68Y.
Oh, and the wife's making a full recovery, by the way.
Cheers,
Colin.