Klausmobile Tue Tester Files
08/1974, unknown factory, typical "E"-grade build (double micas, oversized posts, heatsink above second grid).
Pentode mode, UG2=80V
The tube is rated to operate at Ug=150V, but even at -80V it's high transconductance shows up. At the cost of low Vp/Vg2 rating, of course.
Triode mode, grid 2 ans 3 connected to plate
| Standard specifications per each triode | |||
| Parameter | Maximum | Operating Point | Measured * |
| Ua, V | +250 (+160@G2) | - | 200 |
| Ug, V | - | - | -3.0 |
| Ia, mA | 35 | - | 12.0 |
| Pa, W | 3.0 (+0.7W Grid 2) | - | 2.4 |
| Gm, mA/V | 12 @Ip=15mA, Ig2=4mA | - | 15 |
| Rp, kOhm | 150k for pentode | - | 3 |
| Mu, V/V | - | - | 45 |
Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA
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