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The EZ35 is a standard HT rectifier for low power AC mains driven equipment. The output of a centre tapped transformer would be applied to the anodes, the rating given is 325-0-325, the common cathode would be the output for the rectified voltage. A effective series resistance of 350 Ohms was required to limit surges and the reservoir capacitor had to be restricted to 16 µF. Nothing special and soon replaced by miniature valves of higher specification.

The picture shows the two anodes stacked vertically on the common cathode tube. The heater and separate connection to the cathode are clearly visible. The anodes have been formed to be wider than the active cavity so as to offer a greater radiating area to disperse the heat of operation.

The wide glass tube envelope is 29 mm in diameter, and excluding the IO base pins is 73 mm tall.

References: Data-sheet, ¹⁰⁴⁰ & ¹⁰⁴³. Type EZ35 was first introduced in 1946. See also 1946 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.