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B438 - Triode / Detector or LF amplifier

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B438 PHILIPS Triode, Detector or LF amplifier Dimensions (mm) 83 x 42 Heating direct, AC or DC, parallel Vf (V) If (A) 4 0.1 a g a1 f1 3 4g f1 f2 Base A 2 f2 Capacitances Operating characteristics Cag (pF) Vb (V) Ra (kΩ) Vg (V) Ia (mA) µ S (mA/V) Ri (kΩ) 4 200 200 320 1000 -2.5 -2.5 0.2 0.05 38 38 2.0 2.0 170 400 FP 1999.08.
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