|
STC 5B/254M beam tetrode (CV428).
 |
The valve measures 103x30mm
overall and has a loctal base. The anode connection is the top cap. |
See also CV2465 which is the fly lead variant
of this valve made to a stricter specification
| Heater voltage |
6.3V |
| Heater current |
900mA |
| Max anode voltage |
600V |
| Max anode voltage (Ia=0) |
750V |
| Max screen voltage |
300V |
| Max anode current |
120mA |
| Max anode dissipation |
25W |
| Max screen dissipation |
3W |
| Mutual conductance * |
6mA/V |
| Inner amplification factor * |
9 |
| Max DC grid voltage |
-200V |
| Max RF voltage between g1 and g2 |
1000V |
| Max frequency for above ratings |
60MHz |
| Capacitances |
| Cag |
0.1pF |
| Cge |
13pF |
| Cae |
7pF |
*: At Va=300, Vg2=250, Ia=72mA
| Pin |
Function |
| 1 |
Heater |
| 2 |
Cathode and beam plates |
| 3 |
Screen grid |
| 4 |
Cathode and beam plates |
| 5 |
Control grid |
| 6 |
Control grid |
| 7 |
Cathode and beam plates |
| 8 |
Heater |
| TC |
Anode |
|
