I had a CA-50 and bias setting was not too hard, just remember the high voltages involved and be careful!
ARC CA-50 tube changing
Does any ARC CA-50 owner change their own tubes? If so, how do you bias the tubes? I've read comments that it's best to send the amp to ARC to get it done properly but I've had to bias amps before and I have a multimeter. There are no instructions for doing it that I can find. In fact, no user manual instructions. Anyone care to explain?