The PCB board is 2mm thick and utilizes the Williamson tube amplifier circuit for voltage amplification and phase inversion. The circuit employs four 6SN7 tubes to drive push-pull amplifiers using EL34, KT88, or similar power tubes. The circuit design is universal, requiring only minor adjustments to the negative feedback based on your preferences. It is compatible with various similar power output tubes using the push-pull configuration.
The circuit on the board corresponds to the section outlined in the red circle.
Currently, the PCB is a green board with a 2.0mm thickness, providing excellent strength and durability!
Many users have inquired about PCB boards that include power tubes. To be honest, high-power tubes are not suitable for PCB designs due to the significant heat they generate. The constant heating and cooling cycles inevitably lead to issues such as copper foil delamination and fractures, posing safety risks. This is why I do not include power tube circuits in the design. Instead, only the low-heat, more intricate front-end sections are implemented on the board, while the remaining components—few as they are—are better suited for point-to-point wiring (recommended).
This product has already been sold in large quantities. Feel free to purchase directly.