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.

Warning: Please read and adhere to the following safety precautions and guidelines before building or working with this vacuum tube amplifier:

  • Qualified Personnel: Only trained and qualified personnel should attempt to build, service, repair, or modify these amplifiers. Unauthorized personnel should never attempt to access its internal components.
  • Power Off: Always ensure that the amplifier is powered off and unplugged from the electrical source before attempting any building, maintenance or repairs.
  • High Voltage Hazards: This amplifier contains high-voltage components that can deliver a severe, even fatal, electric shock. Handle all internal components with extreme caution.
  • Capacitor Discharge: Be aware that capacitors inside the amplifier can store electrical charge even when unplugged. Discharge capacitors properly before working on the amplifier to prevent electric shock.
  • Protective Gear: Always wear appropriate personal protective equipment (PPE), including insulated gloves and safety goggles, when working with high-voltage components.
  • Grounding: Ensure that the amplifier is properly grounded to prevent electrical hazards. Do not bypass safety grounding measures.
  • Follow Documentation: Refer to the manufacturer's build manual, and safety instructions for specific guidance on servicing and maintenance.
  • Keep Out of Reach: Keep the amplifier out of reach of children and unauthorized personnel at all times.


    • By using this web site you acknowledge the potential risks associated with high voltages and agree to follow all safety precautions and guidelines provided. Guitar Amplifier PCBs disclaim any liability for injuries or damages resulting from the misuse, mishandling, or improper construction or servicing of this amplifier.