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The 6X2 is a wire-ended EHT rectifier with a 6.3 V 90 mA heater which is normally fed from a well-insulated winding on the line output transformer of a television receiver. This is the original TV EHT rectifier design, which in 1948 made the AC/DC technique possible in the television set.

The valve is thus designed for pulsed operation. The anode PIV is 17 kV and the rectified current has a maximum average value of 350 µA and a peak value of 80 mA. The reservoir capacitor can take a maximum value of 5,000 pF.

The cathode tube is located in the centre of the anode bell and the heater wire looks to be an insulated coil. The heater is connected to one side of the cathode to avoid heater/cathode shorts but this requires an insulated heater supply.

The thin glass tube envelope is 14 mm in diameter and, excluding the base wires is 50 mm tall.

References: Data-sheet & ¹⁰⁴⁰.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.