LS70 power board uses 5AR4 or 5U4G, 274 and other high-current rectifiers for supersonic flows, compared with a small tube rectifier power supply board effect a qualitative leap, a 12AX7 vacuum tube used as a voltage comparator tube, OB2 tube to provide a reference voltage, 2 6V6 tubes for high current regulated output. LS70 power board uses 5AR4 or 5U4G, 274 and other high-current rectifiers for supersonic flows, compared with a small tube rectifier power supply board effect a qualitative leap, a 12AX7 vacuum tube used as a voltage comparator tube, OB2 tube to provide a reference voltage, 2 6V6 tubes for high current regulated output. 



A group of high-voltage output, high voltage 200-400V adjustable, high-voltage current 100mA. Another two adjustable filament voltage. 5V, 6.3V, 12.6V, etc. can be adjusted, the current for each group 1A.

Size: 230mm × 125mm

Input voltage :0-6 .3 V × 2 (1A) ,0-5V × 1 (2A), high voltage and filament input voltage can follow the desired output voltage to select the appropriate value. High maximum allowable input voltage is 400V × 2