Klausmobile Tube Tester Files
MELZ (Moscow), 09/1980. The first subminiature (10x41 mm), flexible leads type in my collection. Right on mark with specs. Although heater current is only 0.34A, the tube is so small it is very, very hot even with zero plate currents.
| Standard specifications per each triode | |||
| Parameter | Maximum | Operating Point | Measured |
| Ua, V | 250 | 100 | 110 |
| Ug, V | - | -2.0 | -2.5 |
| Ia, mA | 12 | 6.3 | 5.0 |
| Pa, W | 0.9 | (0.5) | 0.55 |
| Gm, mA/V | - | 5.0 | 4.3 |
| Rp, kOhm | - | (4.8) | 5.4 |
| Mu, V/V | - | 23 | 23 |
1. Full power curve
2. 6mA 100V closeup
3. 3mA closeup
4. Gm/Mu/Rp measurements
Legend: White curves: Ig<5uA Yellow: 5<Ig<20uA Red: 20<Ig<300uA. Measurements terminate at Ig>300uA
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