CV1540 / 33B/152M double triode
 |
This valve measures 80x44mm overall and has a B9G base |
This is a grounded grid double triode consisting of two completely separate triodes
| Heater voltage * | 6.3V |
| Heater current * | 920mA |
| Max anode dissipation ** | 30W |
| Max operating frequency | 420MHz |
| Max bulb temperature | 200°C |
| Mutual conductance *** | 15.5mA/V |
| Amplification factor *** | 90 |
| Class C, push-pull amplifier, modulated | |
| Max anode voltage | 275V |
| Max anode current | 35mA |
| Max grid current | 9.0mA |
| Max anode dissipation | 5.25W |
| Max grid dissipation | 0.1W |
| Class C, push-pull amplifier, unmodulated | |
| Max anode voltage | 300V |
| Max anode current | 55mA |
| Max grid current | 15.0mA |
| Max anode dissipation | 8.0W |
| Max grid dissipation | 0.2W |
| Capacitances | |
| Cg',k'h' (nom) | 7.5pF |
| Cg",k"h' (nom) | 7.5pF |
| Ca',k'h' (max) | 0.3pF |
| Ca",k"h" (max) | 0.3pF |
| Ca',g' (nom) | 3.75pF |
| Ca",g" (nom) | 3.75pF |
| Ca',a" (max) | 0.5pF |
An internal grid to grid bypass capacitor of approx 50pF is incorporated
(note the second capacitance figure is listed in the EVS data as Cg",k"h' but this may be a typo as Cg",k"h" makes more sense)
*: per section
**: with a total anode dissipation in excess of 16W forced air cooling is required
***: at Va=300, Vg=-1
| Pin | Function |
| 1 | Grid ' |
| 2 | Heater ' |
| 3 | Cathode ' |
| 4 | Heater ' |
| 5 | Grid " |
| 6 | Heater " |
| 7 | Cathode " |
| 8 | Heater " |
| 9 | Grid ' |
| TC1 | Anode ' |
| TC2 | Anode " |
