CV484 / 3S4 power amplifier
pentode
 |
This valve measures 54x17mm
overall and has a B7G base. |
See also CV820 which also carries the 3S4 marking.
| Filament voltage |
1.4/2.8V |
| Filament current |
100/50mA |
| Max anode voltage |
100V |
| Max screen voltage |
75V |
| Mutual conductance * |
1.5mA/V |
| Anode impedance * |
100k ohms |
| Screen current * |
1.4mA |
| Max cathode current |
13.0mA |
*: At Va=90, Vg2=67.5, Vg1=-7.
| Pin |
Function |
| 1 |
Filament -ve ** |
| 2 |
Anode |
| 3 |
Control grid |
| 4 |
Screen grid |
| 5 |
Suppressor grid, filament
centre tap ** |
| 6 |
Anode |
| 7 |
Filament +ve |
**: Pin 1 is fil -ve for Vf=2.8V,
pin 5 is fil -ve for Vf=1.4V when pins 1 and 7 are fil +ve. |
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