PM2DX

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.

PDF Data Sheets 1930, 1934