Details：

PCB Size: 144*178*1.6MM recommend works voltage: High voltage: 0-AC220V 0-AC220V (above 10MA) Filament voltage: 0-AC6.3V (above 1A ) 0-AC6.3V (above 1A ) The High voltage AC200V-250V is ok ,Filament voltage (AC6V-7V is ok) Note: the default price is not include the tubes. This board can works with following tubes: 12AX7、12AU7、12AT7 PRT05A reference famous conrad-johnson CL Circuit , designed with double-single independent design, physically separated 100% left and right channels, independent hierarchical grounding.

Recommend transfromer link:

https://www.ebay.com/itm/164779033370

Note：

Bare pcb：just 1pcs pcb ，have no any parts Diy kit：all the parts need yourself to solder.（not included 4pcs tubes） Assembled board：have tested well，（not included 4pcs tubes）