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 |
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