Tube model：6V6+6SL7. Tube model：6V6+12AX7. Tubes model：EL84+12AX7. Rectifier tube:5Y3 / 5R4 / 5U4 /5AR4 /5Z3. Power tube can use 6V6/6P6P/EL84/6P14. Signal tube can use 6SL7 / 6N9P / 12AX7. Main PCB board size: 120x270mm.
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