PM1HF Azide Triode

2 volt, 100 mA filament. Typical anode voltage 100, grid bias 0 volts. Anode current 2.3 mA, ra 22.5 k ohms, gm 0.8 mA/V, mu 18. B4 base. Equivalent 210HF. Cost 14/- in 1931, equivalent to £109 in 2012!

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