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CV302 triode heptode
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This valve measures 78x32mm overall and has a B8G base. |
| Heater voltage | 6.3V |
| Heater current | 330mA |
| Max heptode anode voltage | 300V |
| Max grid voltage | -0.3V |
| Max grid 2 and 4 voltage | 100V (Ia=3mA)
300V (Ia<1mA) |
| Max triode anode voltage | 175V |
| Max triode anode dissipation | 0.8W |
| Max grid-cathode resistance | 3M ohms |
Typical operating conditions
(Heptode section) |
| Anode voltage | 250V |
| Grid 3 resistor | 50k ohms |
| Grid 3 current | 200µA |
| Grid 1 voltage | -2.0V |
| Anode current | 3mA |
| Grid 2 - grid 4 current | 6.2mA |
| Internal resistance | 1.4M ohms |
| Conversion conductance | 750µA/V |
| Capacitances |
| Cgh | 7.2pF |
| Cah | 9.0pF |
| Cag1 | 0.005pF |
| C triode grid/grid 3 | 9.3pF |
| Ca heptode/a triode | 2.1pF |
| Pin | Function |
| 1 | Heater |
| 2 | Heptode anode |
| 3 | Triode anode |
| 4 | Triode grid, grid 3 |
| 5 | Grid 2, grid 4 |
| 6 | Grid 1 |
| 7 | Cathode, grid 5, internal shield |
| 8 | Heater |
| Spigot | Metal shell |
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