LSDY Tube Rectifier and Tube Regulator
Circuit modified from ARC regulator, uses 6Z4 for rectifier, 12AT7 & 12B4A for regulator. B+ is adjustable from 150V ~ 340V, with one heater output selectable for 6.3VDC or 12..6V DC.
double side gold plated PCB
board size: L 222mm X W 128mm
(tubes, case and power transformer not included)