Building tube amplifiers involves working with, or around, high voltages. Working inside a tube amplifier can be dangerous if you don't know the basic safety practices. Building, modifying, or repairing tube amplifiers should only be performed by trained personnel. If you have not been trained to work with high voltages then have an amp technician service or modify your amp.
WARNING: Guitar amplifiers contain LETHAL high voltages, sometimes over 700 volts AC and 500 volts DC. Even unplugged filter capacitors can store enough voltage to do permanent harm or be lethal. Any modifications are done entirely at your own risk and Guitar Amplifier PCBs assumes no liability or responsibility, under any circumstance, for personal injury or damage to property or personal property. Not only can this kill you, it will really really hurt the whole time that you are dying.
Guitar Amplifier PCBs IS NOT RESPONSIBLE for any misprints, typo errors or printing mistakes which may cause damage to people or equipment. Guitar Amplifier PCBs reserves the right to make design changes or improvements without obligation to revise prior versions. All specifications are subject to change without notice.