CV882 / DH81 / 7B6 / E1838 double diode triode
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This device measures 70x37mm overall and has an 8 pin loktal base. |
This is a double diode high-µ triode suitable for use as a detector and audio amplifier.
| Heater voltage | 7V |
| Heater current | 320mA |
| Max anode voltage | 300V |
| Max heater cathode voltage | 90V |
| Max diode drop at 0.8mA | 10V |
| Max diode current per anode, continuous | 1mA |
| Mutual conductance * | 1100 micromhos |
| Amplification factor * | 100 |
| Anode resistance * | 91k ohms |
*: At Va=100, Vg=-2
| Pin | Function |
| 1 | Heater |
| 2 | Triode anode |
| 3 | Control grid |
| 4 | Cathode |
| 5 | Diode ' anode |
| 6 | Diode '' anode |
| 7 | Cathode |
| 8 | Heater |
Above: CV822 / DH81, left, CV882 / 7B6, right.
Below: labels on the other side of each valve
The E1838 (s/n 142), above, has DH81 written on it
These two valves differ in their construction as can be seen above. Also, below, is the base detail of the two.
