CV4056 reliable video output
pentode.
 |
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
 |
