CV424 double RF beam tetrode
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This valve measures 115x42mm overall and has a 7 pin base. |
The prototype of this valve is QQV06/40. It has a centre tapped 12.6V heater.
The valve can operate at full ratings up to 150MHz with normal radiation/convection cooling. With forced-air cooling at 2cu.ft per minute it can operate to 250MHz, and with cooling at 5cu.ft per minute to 300MHz.
See also CV2797.
| Heater voltage | 6.3V |
| Heater current | 1.8A |
| Max anode voltage | 600V |
| Max grid voltage | -175V |
| Max screen voltage | 250V |
| Max heater cathode voltage | 100V |
| Max cathode current (each) | 120mA |
| Max peak cathode current (each) | 700mA |
| Max anode dissipation (each) | 20W |
| Max screen dissipation (each) | 3.5W |
| Max grid dissipation (each) | 1W |
| Max bulb temperature | 180C |
| Capacitances | |
| Cag | 0.06pF |
| Cgc | 10.5pF |
| Cac | 3.2pF |
| Cout | 2.0pF |
| Cin | 6.0pF |
| Pin | Function |
| 1 | Heater |
| 2 | Control grid " |
| 3 | Screen grids |
| 4 | Cathode |
| 5 | Heater centre tap |
| 6 | Control grid ' |
| 7 | Heater |
| TC1 | Anode ' |
| TC2 | Anode " |