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VR125 / 10E/25 HF pentode
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This valve measures 125x45mm overall and has a B7 base |
| Heater voltage | 4V |
| Heater current | 1A |
| Max anode voltage | 250V |
| Max screen voltage | 125V |
| Max anode dissipation | 3W |
| Max screen dissipation | 1W |
| Max grid resistance | 3M ohms |
| Mutual conductance * | 2.8mA/V |
| Anode impedance * | 600k ohms |
| Capacitances |
| Cae | 9.0pF |
| Cge | 9.0pF |
| Cag max | 0.005pF |
*: At Va=250, Vg2=125, Vg1=-2, Ia=5.4mA
| Pin | Function |
| 1 | Metallising |
| 2 | Anode |
| 3 | Suppressor grid |
| 4 | Heater |
| 5 | Heater |
| 6 | Cathode |
| 7 | Screen grid |
| TC | Control grid |
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