VR28 / 10E/8399 tetrode
 |
This valve measures 126x40mm overall and has a B4 base. |
| Filament voltage |
2V |
| Filament current |
200mA |
| Max anode voltage |
150V |
| Max screen voltage |
80V |
| Mutual conductance (A) |
1.6mA/V |
| Mutual conductance (B) |
0.1mA/V |
| Anode impedance (A) |
110k ohms |
(A): At Va=150, Vg2=60, Vg1=0.
(B): At Va=150, Vg2=60, Vg1=-15.
| Pin |
Function |
| 1 |
Screen grid |
| 2 |
Control grid |
| 3 |
Filament -veand metallising |
| 4 |
Filament +ve |
| TC |
Anode |
|
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