The pre-amplifier is based on two 6N8P(6SN7) and one 5Z4P tubes, 6N8P work as amplifing tubes and one 6Z5P rectifier tube to rate power,It is a very musicial tube preamp.
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The pre-amplifier is based on two 6N8P(6SN7) and one 5Z4P tubes, 6N8P work as amplifing tubes and one 6Z5P rectifier tube to rate power,The 6N8P can be substituated with 6SN7 to give different taste, There are 3 potentiometers to adjust bass / treble and volume,MOSFET Regulator to filte power.The control section with 3 potentiometers can be detached from preamp board which can be install on faceplate of enclosure/case, Meanwhile it must be hooked with preamp board by soldering cables, The filament of 6N8P(6SN7) should be connected by using twristed pair cables
Power supply: AC 230V-0-230V , 0-6.3V *2 , 30VA
PCB demension: 205mm*120mm
Packing List: One tube preamp with adjustable bass/treble/volume base on Shigeho Wada's circuit
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