Details：

Pcb size：100x59mm （L*W） Suitable for 6Z4/5Z2P/5Z3P/5Z4P/5U4G/5AR4 8 pin tube seat apply for 5Z3P/5Z4P/5U4G/5AR4,connect to 5V 7 pin tube seat apply for 6Z4 ，connect to 6.3V R1: Recommended 47-100Ω, which can reduce the impact on the rectifier tube. R2: The resistance value can be adjusted according to the needs of the circuit, please leave a margin for the power of the two resistances. C1: The volume should not be too large to avoid impact damage to the tube duct, 47uF-100uF is recommended. C2: Try not to exceed 100uF. The above are just our suggestions, you have to choose according to your own understanding and experience.

Package included：

As the picture show Not included tube ，resistance ，capacitance ！

Assembled board，just for reference：