CV5948 triode pentode
 |
This valve measures 54x19mm overall and has a B9A base. |
This valve is an ECF804.
| Heater voltage | 6.3V |
| Heater current | 450mA |
| Pentode section | |
| Anode voltage | 150V |
| Screen voltage | 150V |
| Control grid voltage | -2V |
| Anode current | 7mA |
| Screen current | 2.2mA |
| Anode impedance | 350k ohms |
| Mutual conductance | 11mA/V |
| Triode section | |
| Anode voltage | 150V |
| Control grid voltage | -1.5V |
| Anode current | 13.5mA |
| Anode impedance | 5300 ohms |
| Mutual conductance | 7.2mA/V |
| Capacitances | |
| Cgk (pentode) | 7.0pF |
| Cak (pentode) | 3.1pF |
| Cga (pentode) | 0.02pF |
| Cgk (triode) | 2.5pF |
| Cak (triode) | 1.5pF |
| Cga (triode) | 1.8pF |
| Pin | Function |
| 1 | Triode anode |
| 2 | Pentode control grid |
| 3 | Screen grid |
| 4 | Heater |
| 5 | Heater |
| 6 | Pentode anode |
| 7 | Pentode cathode + suppressor grid |
| 8 | Triode cathode |
| 9 | Triode grid |
