The EZ80 full wave rectifier was found in many broadcast receivers and domestic audio equipment. This exhibit is from 6202
Suited to the task, at 90 mA maximum current and with a required series resistance of 300 Ω to reduce the initial surge in charging the maximum 50 µF reservoir capacitor, each anode would conduct in turn when connected to either end of a grounded centre tapped mains transformer.
The EZ81 is pin compatible but rated at 160 mA. The older EZ40 has the same rating as the EZ80 and is on a B8A base.
The identical anodes are mounted at right angles to one another.
The common cathode runs through both anodes.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 59 mm tall.
References: Data-sheet & 1040. Type EZ80 was first introduced in 1954. See also1954 adverts.
