UX-Base 4 Pins, Filament 2.5 Volts 6 Ampere.
Tantalum anode xenon-filled full wave rectifier. 725 volt PIV, 12 to 250V per anode operating, 1A DC output.
This listing includes many hard to find tubes from manufacturers like Philips, GE, Sylanvia, Raytheon, and more.