|
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 |
|
 |
