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D77Sensibly equivalent¶ to:See also:
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The D77 is the Marconi equivalent of the Mullard EB91, and consists of two separate signal diodes in the envelope. The QD77 is a special quality version of this valve.The diodes were designed for vision and sound detection in television receivers. Additionally they are recommended for limiting and DC restoration.![](../pics/aaa0347a.jpg)
The MWT logo.The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 46 mm tall.References: Data-sheet & 1040. Type D77 was first introduced in 1949. See also 1949 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ![](../static/key.gif) k(1) | a(2) | h | h | k(2) | s | a(1) |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | mAa | ![](../static/pdflogo.gif)
| 6.3 | 0.3 | 150 | 9 |
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Updated January 05, 2013.
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