Klausmobile Tube Tester Files

Standard specifications
Parameter Maximum Operating Point Measured
Ua, V 350 / 450@5W 110 -
Ug, V - -7 -
Ia, mA 140 95 -
Pa, W 11 @200V, 7@350V 10.5 -
Gm, mA/V - 7.5 -
Rp, kOhm - 0.42 -
Mu, V/V - (3) -

1. Curve at normal Uheater, as far as my hardware can go. Certainly a tube with Mu of 2 needs a -100V grid driver while I can only supply -10V

2. How about using it as a rectifier diode? Curves with grid hooked to cathode. Expect 40V voltage drop at max current. As the above chart suggests it is pretty safe for the grid, at 0 bias grid current is under 100 uA. As for the perils of cold-starting the tube like a usual rectifier - I don't know.

3. Some measurements

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

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