Klausmobile Tue Tester Files

Ancient octal all-metal pentode

Pentode mode, UG2=80V

Triode mode, grid 2 connected to plate

Standard specifications per each triode
Parameter Maximum Operating Point Measured *
Ua, V +330 (+200@G2) - 177
Ug, V - - -5.0
Ia, mA not rated - 5.0
Pa, W 0.8 (+0.1W Grid 2) - 0.9
Gm, mA/V 1.2 @Ip=2 - 2
Rp, kOhm 1200k for pentode - 22
Mu, V/V - - 11


Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA

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