NR51 vari-mu HF pentode
 |
This valve measures 130x43mm overall and has a B7 base. |
This valve carries the serial number 7593C (but
7592C on the box), and has Adm Patt 1166 on
the base.
| Heater voltage |
4V |
| Heater current |
1.2A |
| Anode voltage |
200V |
| Screen voltage |
100V |
| Mutual conductance (Va=200, Vg2=100, Vg1=-2) |
2.5mA/V |
| Capacitances |
| Ca,g1 (max) |
0.006pF |
| Cin |
12.5pF |
| Cout |
10.2pF |
| Pin |
Function |
| 1 |
Metallising |
| 2 |
Control grid |
| 3 |
Suppressor grid |
| 4 |
Heater |
| 5 |
Heater |
| 6 |
Cathode |
| 7 |
Screen grid |
| TC |
Anode |
|
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