No. The jacks and the pots are used to set the bias on the power tubes. It requires that the 1/4" plug be connected to a meter; without seeing the circuit closer I can't say if it would be set to DC volts are DC amps, but in the end you set the meter to the right reading using the pots. Both tubes would be set to the same value. Depending on the power tube the correct value shouldn't be hard to sort out.
BTW this amp is really off topic on this particular forum. I suspect you might find better luck- maybe someone might have even seen it before over on DIYaudio.com. They have a section devoted entirely to musical instruments.
BTW this amp is really off topic on this particular forum. I suspect you might find better luck- maybe someone might have even seen it before over on DIYaudio.com. They have a section devoted entirely to musical instruments.