CV139 grounded-grid triode
 |
This valve measures 50x17mm approx, and has a B7G base |
| Heater voltage | 6.3V | |
| Heater current | 0.3A | |
| Max anode voltage | 250V | |
| Max anode dissipation | Without can | 2.5W |
| Max mean cathode current | 15mA | |
| Mutual conductance | At Va=250V;
Vg=-1.5V; Ia=10mA |
9.0mA/V |
| Amplification factor | 100 | |
| Min grid voltage
to be available to ensure cut-off to a slope of 100µA/V |
-8V | |
| Max h-k voltage | 150V | |
| Max g-k voltage | 100V | |
| Max operating frequency | 250MHz | |
| Capacitances | ||
| Ca-ch | At 1MHz with
close fitting metal can connected to grid |
0.1pF |
| Cg-ch | 5.1pF | |
| Chc | 8.6pF | |
| Pin | Function |
| 1 | Grid |
| 2 | Cathode |
| 3 | Heater |
| 4 | Heater |
| 5 | Cathode |
| 6 | Grid |
| 7 | Anode |
