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CV2239 HF oscillator triode
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This valve measures 36x9x6mm overall and has a B5G/F base with 4 wires fitted. |
| Filament voltage | 1.25V |
| Filament current | 120mA |
| Max anode voltage | 150V |
| Anode current * | 4mA |
| Mutual conductance * | 1.65mA/V |
| Amplification factor * | 15 |
| Max operating frequency | 350MHz |
| Max cathode current | 11mA |
| Capacitances |
| Cag (nom) | 1.3pF |
| Cin (nom) | 1.35pF |
| Cout (nom) | 3.25pF |
*: At Va=135V, Vg=-5V
| Lead | Function |
| 1 (red dot) | Anode |
| 2 | No lead |
| 3 | Filament -ve |
| 4 | Grid |
| 5 | Filament +ve |
The specification data for this valve indicates that only the CV code, factory code, date code and
the number '5676' be printed on the valve. This exhibit is marked CV2239, NK, 5676, HR. 5676 is
listed as the prototype.
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