CV6137 / 4CX250B beam tetrode
 |
This valve measures 61x40mm overall and has an 8 pin base |
| Heater voltage | 6V |
| Heater current | 2.6A |
| Min heating time | 30 sec |
| Max anode temperature | 250°C |
| Max seal temperature | 250°C |
| Max anode voltage | 2kV |
| Max screen voltage | 400V |
| Max usable frequency | 500MHz |
This valve is rated at 400W CW output to 175MHz and 250W CW at 500MHz
| Pin | Function |
| 1 | Screen grid |
| 2 | Cathode |
| 3 | Heater |
| 4 | Cathode |
| 5 | Do not use |
| 6 | Cathode |
| 7 | Heater |
| 8 | Cathode |
| TC | Anode |
| Ring | Screen grid |
| Base spigot | Control grid |
