HiFi 6Z4/5Z3P/5Z4P/5AR4 Tube Preamp / Phono Rectifier Power Supply Board Kit

7 pin tube seat apply for 6Z4 ，connect to 6.3V. 8 pin tube seat apply for 5Z3P/5Z4P/5U4G/5AR4,connect to 5V. C2: Try not to exceed 100uF.

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