Feature PCB size: the main amplifier board: 10.3 * 7.6cm Power supply board size: 9.5 * 9.2cm 1.5mm double-sided spray tin process high-quality circuit board This board is use 6N3 SRPP circuit Power Requirements: Dual 180V-230V three-wire , two independent 6.3V Power plate forms: high-pressure part after the 6Z4 rectifier ----- 400V220uf capacitor filter output Low-pressure part of the rectifier bridge rectifier ----- capacitor filter ------ LM7806 regulator ---- capacitor filter output The 6Z4 filament voltage is AC 6.3V direct input Power some of the high and low ground has been connected as one part of the power supply has been connected to easier handling of the whole earth Motherboard parts of the filament wiring two are independent that is not like the 6N3 filament DC friends can be entered directly on the motherboard exchange 6.3V Transformator: 230-0-230V 6.3V -0-6.3V note: it is a kit, you need solder by yourself. thanks Package 1pc Tube 6N3 SRPP Buffer Preamplifier Pre AMP kit
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