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The GE10 is a saturated emission diode primarily for use as a control element in AC stabiliser circuits.

The GE10 has a directly heated tungsten filament and to ensure that it operates with saturated current the anode voltage must be 100 Volts or more. The characteristic that makes it suitable as a control element is the large change in anode current for a small change in filament voltage.

The internal structure is obscured by the gettering. What can be seen is a small cylinder near the base and a wire frame higher up in the envelope.

The base connections marked j indicates a short circuit between pins 3 and 4. This enables the equipment to be designed such that if the valve is removed the equipment will shutdown.

Thanks to R J Sutherland for supplying the information.

The wide glass tube envelope is 27 mm in diameter and, excluding the IO base pins, is 60 mm tall.

References: Private communication & data-sheet. Type GE10 was first introduced in 1957. See also 1957 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.