CV2666 double beam tetrode
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This valve measures 107x55mm overall and has a 7 pin B7A base. |
This is an RF double beam tetrode based on the 829B.
| Heater voltage (centre tapped 12.6V heater) | 6.3V |
| Heater current | 2.25A |
| Max anode voltage (with forced air cooling) | 750V |
| Max grid voltage | -175V |
| Max grid current | 7.5mA |
| Max screen grid voltage | 225V |
| Max anode dissipation | 20W |
| Max screen dissipation | 6.5W |
| Mutual conductance * | 1.9mA/V |
| Anode impedance * | 67k ohms |
| Inner µ (g1 - g2) * | 5.6 |
| Max frequency at full ratings | 200MHz |
| Max frequency at half ratings | 300MHz |
| Capacitances (each section) | |
| Cag max | 0.12pF |
| Cge nom | 13.75pF |
| Cae nom | 6.95pF |
| Cg2c max | 65pF |
*: At Va=300, Vg2=250, Ia=25mA
| Pin | Function |
| 1 | Heater |
| 2 | Control grid " |
| 3 | Screen grids |
| 4 | Cathode + beam plates |
| 5 | Heater centre tap |
| 6 | Control grid ' |
| 7 | Heater |
| TC1 | Anode ' |
| TC2 | Anode " |
