1B3GT

High-Voltage Half-Wave Vacuum Rectifier Diode, designed to handle extreme inverse voltage pulses up to 16,000V peak. It operates with a low-power 1.25V filament to safely rectify high-voltage flyback transformer pulses into stable high-voltage DC anode power for monochrome and early color CRT picture tubes, housed in an extended large 8-pin Octal-style base glass envelope (T-9 bulb).