CV3885 / EF40 audio pentode
 |
This valve measures 60x21mm overall and has a B8A base |
| Heater voltage | 6.3V |
| Heater current | 200mA |
| Max anode voltage (Ia=0) | 550V |
| Max operating anode voltage | 300V |
| Max anode dissipation | 1W |
| Max screen voltage (Ig2=0) | 550V |
| Max operating screen voltage | 200V |
| Max screen dissipation | 200mW |
| Max cathode current | 6mA |
| Max heater-cathode voltage | 100V |
| Pin | Function |
| 1 | Heater |
| 2 | Anode |
| 3 | i/c |
| 4 | Suppressor grid |
| 5 | Control grid |
| 6 | Screen grid |
| 7 | Cathode + shield |
| 8 | Heater |
The valve carries the markings 'L89 F1H1'
