Details:
Power supply requirement: Secondary voltage requirements AC230 ~ AC280v, greater than 30mA, 6.3V greater than 2A.
PCB size: 130x285mm
Tube model: SHUGUANG 12AX7 /JJ ECC83S *3
Note:
Diy Kit with capacitance : As the picture show ,it is a kit ,need buyer to solder it ,included all capacitance(not included 3pcs tubes)
Recommend transformer: https://www.ebay.co.uk/itm/273865971106
Assembled board ,just for reference: