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A425 PHILIPS
Triode, Detector or LF amplifier
Dimensions (mm)
83 x 42
Heating direct, AC or DC, parallel
Vf (V) If (A)
4 0.065
a g
a1
f1
3
4g
f1 f2
Base A
2
f2
Capacitances
ag
23
14
f2 Base G
f1
Cag (pF)
3
Operating characteristics
Vb (V) Ra (kΩ) Vg (V) Ia (mA) µ S (mA/V) Ri (kΩ)
200 320
-2.5 0.25 25 1.2 80
200 1000
-2.5 0.1 25 1.2 250
FP 1999.08.
A425 Datasheet
