CV2901 / EF86 low hum, low
microphony pentode
 |
This valve measures 55x19mm
overall and has a B9A base. |
See also CV4085 and CV4086 which are based on this valve.
| Heater voltage |
6.3V |
| Heater current |
200mA |
| Max anode voltage (Ia=0) |
550V |
| Max screen voltage (Ig2=0) |
550V |
| Max anode dissipation |
1W |
| Max screen dissipation |
200mW |
| Max DC anode voltage |
300V |
| Max DC screen voltage |
300V |
| Max cathode current |
6mA |
| Anode current * |
3mA |
| Screen current * |
0.55mA |
| Mutual conductance * |
2mA/V |
| Anode impedance * |
2.5M ohms |
| Inner amplification factor |
38 |
| Max heater cathode voltage |
50V |
| Capacitances
(without metal screen) |
| Cag max |
0.05pF |
| Cge |
4.3pF |
| Cae |
5.1pF |
*: At Va=250, Vg2=140, Vg1=-2.
| Pin |
Function |
| 1 |
Screen grid |
| 2 |
Shield |
| 3 |
Cathode |
| 4 |
Heater |
| 5 |
Heater |
| 6 |
Anode |
| 7 |
Shield |
| 8 |
Suppressor grid |
| 9 |
Control grid |
|
