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PM2DX - later Mullard with top engraved id. Detector triode, 2 V, 200 mA filament. Maximum anode voltage 150 V, grid bias -6 V, mu 13.5, ra 10.7 kOhms. Cost 14/- in 1931, equivalent to £109 today! B4 base.
This page last modified by AJC on Saturday, 27-Mar-2010