CV1129 / VR129 / 10E/307 / NR71 / CV1284 HF pentode
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This valve measures 121x45mm overall and has a 7-pin B7 base. |
'ADSPECS' data indicates that NR71 and VR129 are the same valve, and the EVS data shows both are CV1129. Thus this page contains both CV1129 and CV1284, the latter example also being marked NR71.
| Heater voltage | 4V |
| Heater current | 1A |
| Max peak anode voltage | 4kV |
| Max screen voltage | 125V |
| Max anode dissipation | 3W |
| Max screen dissipation | 1W |
| Max grid resistance | 2M ohms |
| Mutual conductance * | 2.8mA/V |
| Anode impedance * | 600k ohms |
| Capacitances | |
| Cae | 5.0pF |
| Cge | 12.0pF |
| Cag max | 0.02pF |
*: At Va=250, Vg2=125, Vg1=-2; Ia=5.4mA.
| Pin | Function |
| 1 | n/c |
| 2 | Control grid |
| 3 | Suppressor grid |
| 4 | Heater |
| 5 | Heater |
| 6 | Cathode |
| 7 | Screen grid |
| TC | Anode |
