• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

ARC Classic 60 circuit

There is a hole on the side of the unit which accepts a small screwdriver for tuning. You have probably not seen this hole :) When I was working on mine (many years ago), I was quite surprised to find this hole.

If you call up AR, they will most likely send you a service manual, especially if you can provide a serial number.


Thanks for the all reply. I would liike to know is ARC havent the e-mail address? Becoz I cant find any e-mail on their website! And I think I better to ask for the service guide from them. Also I would like to order some spare parts for the CL60 and the SP11!!! Like the know and the power switch.... easy damage man!

Ofcoz I still want to ask for the circuit who can be help!