The Tungsram PV25 is an indirectly heated rectifier. The two sections of the rectifier were designed to be used in parallel or as a voltage doubler on 110 Volt mains.
The heater rating of 300 mA indicates heater chain use in radio receivers or early television sets.
The two half wave rectifier sections mounted side by side.
The B7 base.
Thanks to Mark Mallison for sending the image.
The classic envelope is 44 mm in diameter, and excluding the B7 base pins is 105 mm tall.
Reference: 1043. Type PV25 was first introduced in 1938. See also1938 adverts.
