[soundray]

Thanks to all for your input and encouragement.

Ted

I have a simple tone generator that gives me a selectable range between 40 Hz and 15 kHz at -30, -10 or 0dB. I’ve squeezed the scope onto my bench and have managed to get a 1 kHz tone at -10dB onto the scope. That’s about all I’ve had time to do with it so far with other things going on.

dc

Thanks for your advice, as you say, I’ve got two problems on the go here. I’ve put a meter across the outputs and there doesn’t appear to be any significant DC on them. Ripple on the power lines is something I’ll have to look into how to find. It’s all a learning exercise at the moment. As you say, no blown fuses, burnt components or smoke so far so I guess I can count myself lucky. Thanks for the tip on the power resistors, I’ll get a couple of those and put them to use.

Ray