CV138 HF pentode
 |
This valve measures 54x17mm and has a B7G base. |
See also CV2195 which is a selected CV138, and CV2001 which is a modified CV2195.
| Heater voltage | 6.3V |
| Heater current | 0.3A |
| Max anode voltage (Ia=0) | 550V |
| Max screen voltage (Ia=0) | 450V |
| Max operating anode voltage | 300V |
| Max operating screen voltage | 300V |
| Max anode dissipation | 3W |
| Max screen dissipation | 0.9W |
| Mutual conductance (Va=Vg2=250V; Ia=10mA; Vg1=-2V) |
7.5mA/V |
| Pin | Function |
| 1 | G1 |
| 2 | K |
| 3 | H |
| 4 | H |
| 5 | A |
| 6 | G3 + s |
| 7 | G2 |
The valve below is marked CV2000 and EF91. The CV2000 is incorrect as that particular valve is wire ended. See CV2000.
