1V2

High-Voltage Half-Wave Vacuum Rectifier Diode, designed to handle extreme inverse voltage pulses up to 7,500V peak. It operates with a low-power 1.25V filament filament to safely rectify high-voltage flyback transformer pulses into stable DC focus or anode voltage for monochrome CRT picture tubes, housed in a compact 9-pin miniature glass envelope (Noval, T-6.5 bulb).