CV4056 reliable video output pentode.
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This valve measures 67x19mm overall and has a B9A base. |
The CV Spec for CV4056 is for a valve with flying leads, not pins as the second example has. The pinned valve is the CV4055.
| Heater voltage | 6.3V |
| Heater current | 750mA |
| Max anode voltage (Ia=0) | 500V |
| Max screen voltage (Ig2=0) | 500V |
| Max operating anode voltage | 300V |
| Max operating screen voltage | 300V |
| Max cathode current | 65mA |
| Max peak cathode current | 1.5A |
| Pentode connected | |
| Max anode dissipation | 12W |
| Max screen dissipation | 2W |
| Anode current * | 40mA |
| Screen current * | 6mA |
| Mutual conductance * | 11mA/V |
| Inner amplification factor * | 26 |
| Capacitances | |
| C in (nom) | 12.5pF |
| C out (nom) | 5pF |
| Cag1 (max) | 0.18pF |
| Triode connected (G2 to A, G3 to K) | |
| Max anode dissipation | 12.5W |
| Cathode current ** | 46mA |
| Mutual conductance ** | 13mA/V |
| Amplification factor | 26 |
| Capacitances | |
| C in (nom) | 6pF |
| C out (nom) | 6pF |
| Ca, g1 (max) | 6.5pF |
*: At Va=Vg2=250V;Vg1=-4.5V;
Vg3=0
**: At Va=Vg2=250V;Vg1=-4.5V; Vg3=0
| Pin | Function |
| 1 | i/c |
| 2 | Control grid |
| 3 | Cathode |
| 4 | Heater |
| 5 | Heater |
| 6 | n/c |
| 7 | Anode |
| 8 | Screen grid |
| 9 | Suppressor grid |
Above: example with correct fly leads; below: a pinned example which is not correct
