CV2128 triode/heptode
 |
This valve measures 65x19mm overall and has a B9A base. |
| Heater voltage | 6.3V |
| Heater current | 300mA |
| Heptode section | |
| Max anode voltage (Ia=0) | 600V |
| Max anode voltage | 330V |
| Max anode dissipation | 1.9W |
| Max screen voltage (Ia=0) | 600V |
| Max screen voltage (Ia=1mA) | 330V |
| Max screen voltage | 140V |
| Max screen dissipation | 1.1W |
| Mutual conductance (Va=250; Vg2=100; Ia=6.5ma) | 2.4mA/V |
| Triode section | |
| Max anode voltage (Ia=0) | 600V |
| Max anode voltage | 275V |
| Max anode dissipation | 0.9W |
| Mutual conductance (Va=100; Ia=13.5mA) | 3.7mA/V |
| Capacitances | |
| Cin (heptode) | 4.8pF |
| Cout (heptode) | 7.9pF |
| Cag1 max (heptode) | 0.01pF |
| Cin (triode) | 2.7pF |
| Cout (triode) | 2.3pF |
| Cag (triode) | 1.0pF |
| Cg3 - rest (heptode) | 6.0pF |
| Cg1-g3 max (heptode) | 0.3pF |
| Cg1-(g3+g) max | 0.45pF |
| Pin | Function |
| 1 | Heptode G2 and G4 |
| 2 | Heptode G1 |
| 3 | Cathode, shield and Heptode G5 |
| 4 | Heater |
| 5 | Heater |
| 6 | Heptode anode |
| 7 | Heptode G3 |
| 8 | Triode anode |
| 9 | Triode grid |
