• 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.

Checking ARC SP9


2007-01-01 11:14 pm
Hi all,

I recently moved to mexico and shipped my audio gear. Visual inspection looked ok, installed tubes and fired up, no smoke!

However I have almost no gain? I am not sure if anyone can help with where to begin diagnosing this problem.