CV1950 heptode
 |
This valve measures 115x38mm overall and has an octal base with 7 pins fitted |
| Heater voltage | 6.3V |
| Heater current | 300mA |
| Max anode voltage | 250V |
| Max screen voltage | 150V |
| Operating conditions | |
| Anode voltage | 250V |
| Screen voltage | 150V |
| Control grid voltage | -6V |
| Mixer grid voltage | 15V DC |
| Peak oscillator voltage | 18V |
| Total cathode current | 12mA average |
| Average conversion conductance | 310µmhos |
| Conversion impedance | 1MΩ |
| Capacitances | |
| Cg1-g3 | 0.26pF |
| Cg1-a | 0.17pF |
| Cg1-all | 6.0pF |
| Cg3-all | 11.25pF |
| Ca-all | 8.5pF |
| Cg3-a | 1.0pF |
Note: the above figures are for the CV1280. The CV Register indicates that it is
an equivalent and both it and the CV1950 share the same
prototype (X64)
| Pin | Function |
| 1 | n/c |
| 2 | Heater |
| 3 | Anode |
| 4 | Screen grid (G2 + G4) |
| 5 | Oscillator grid (G3) |
| 6 | no pin |
| 7 | Heater |
| 8 | Cathode + suppressor grid (G5) |
| TC | Control grid (G1) |
