The 12AF3 Half-Wave Vacuum Rectifier has a peak inverse plate voltage of 4500 volts, an average plate current of 185 mA max (peak=750 mA max), and a heater voltage of 12.6 volts (0.6 mA). The pins 4 and 5 are for the heater, pin 9 is the plate, and the pin on top is the cathode. I really couldn't tell you if it would work at 350 volts, but I guess it couldn't hurt to try!
: I have a lot of tubes type 12AF3. It is possible to use them as rectifier at medium currents (100 - 150 mA) and normal plate voltages (350 Volts)? I can't find any data about this tube.
: I will be glad for any help!
: Martin