HF Diode
The 1A3 Vacuum tube is a miniature type used as a
detector tube in portable FM receivers and in portable HF
measuring equipment. It was first developed in 1947.
Electrical Data:
Heater Voltage ................................ 1.4 V
Heater Current ................................ 0.15 A
Maximum Heater-Cathode Voltage ................ 140 V