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DK91Sensibly equivalent¶ to:See also:
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The DK91 is a miniature B7G dry battery heptode, it was designed for frequency changer use in battery portable radio receivers. The valve was designed for self oscillating service.![](../pics/aad0025a.jpg)
The only visible details are the single strand filament and a few of the wire grid ends.The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.References: Data-sheet & 1040. Type DK91 was first introduced in 1946. See also 1946 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ![](../static/key.gif) f- | a | g4,g4 | g1 | f- | g3 | f+ |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 1.4 | 0.05 | 90 | 67.5 | 0 | 1.6 | 3.2 | 0.6M | 0.3 |
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Updated February 20, 2022.
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