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DF91Sensibly equivalent¶ to:See also:
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The DF91 is a is a miniature screened pentode for dry battery operation. It was designed for broadcast radio reception and is a variable μ RF device.See also 1T4The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 47 mm tall.References: Data-sheet & 1040. Type DF91 was first introduced in 1947. See also 1947 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | f- | a | g2 | ic | f- | g1 | f+ |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 1.4 | 0.05 | 90 | 67.5 | 0 | 3.5 | 1.5 | 0.5M | 0.9 |
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Updated October 25, 2020.
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