Klausmobile Tube Tester Files
Saratov (Reflector factory), made 07/1995, re-tested 12/1998 (stamp on the back: pereprov 98 12). Purchased directly from the factory stock. All 6N9S tubes in this stock were twisted - literally, the bottle was off-axis with base. Nevertheless, performs close to the specs and the triodes match for all 3 tubes I happen to have. Quite close to the ancestor's specs, too.
| Standard specifications per each triode | |||
| Parameter | Maximum | Operating Point | Measured (*) |
| Ua, V | 275 | 250 | 245 |
| Ug, V | <-1.0 | -2.0 | -2.0 |
| Ia, mA | 12 | 2.3 | -2.0 |
| Pa, W | 1.1 | (0.58) | (0.49) |
| Gm, mA/V | - | 1.6 | 1.5 |
| Rp, kOhm | - | 44 | 53 |
| Mu, V/V | - | 70 | 79 |
(*) As close to standard O/P as the tester could approach.
1. Curve at normal Uheater, full operating power
2. Curve at Uheater = 5.0V
3. Normal Uheater - 2mA closeup. If it seems there's some sinewave noise added to curves under 1mA, it is! That's the quantization effect at very small currents. Not AC noise. Just disregard it. I should add some dithering to plate current readings.
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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