Klausmobile Tube Tester Files

All-metal video pentode (9 Watt total dissipation). Needs only -3V bias, so can work as a single-stage SE audio amplifier.

Triode mode (G3 tied to cathode)

Pentode mode, VG2=80V, G3 tied to cathode, this is plate current chart, not cathode (screen currents do not affect Ip reading). Nominal operation is at VG2=150V, VG1=-3.0V, Ia=30mA; with 80V, 30mA is reached only at zero bias

Reverse Triode Mode: VP=80V, VG2=Variable, G3 tied to cathode, this is screen current chart that is actually triode-like

Screen triode mode: Plate and G3 tied to cathode

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

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