Klausmobile Tube Tester Files
6N2P: 01/1958, unknown plant. Light-grey (seems like uncoated at all) plate. Double-layered thick mica. Upper mica sits immediately above plate assembly. Getter dish suspended by s single post.
6N2P-EV: 08/1982, Voskhod (Kaluga). . Single-layered mica. Upper mica spaced about 3 mm above plate assembly. Getter dish on two posts. Plate also looks like uncoated.
Both tubes measured close although weaker than specification. Inside each, triodes differed, around 0.1-0.2 V grid voltage differential.
| Standard specifications per each triode | |||
| Parameter | Maximum | Operating Point | Measured - 1982 tube |
| Ua, V | 300 | 250 | 234 |
| Ug, V | - | (-1.5) | -1.5 |
| Ia, mA | 10 | 1,8 | 2,0 |
| Pa, W | 1.0 | (.45) | (.46) |
| Gm, mA/V | - | 2.25 | 1.8 |
| Rp, kOhm | - | 50 | 44 |
| Mu, V/V | - | 98 | 77 |
1. Curve at normal Uheater, full operating power
2. 3mA closeup
3. 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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