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EF40Sensibly equivalent¶ to:See also:
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Mullard describe the EF40 as a voltage amplifying pentode, primarily intended for use in high gain RC coupled AF voltage amplifier stages.The B8A EF40 was developed into the B9A EF86.The thin glass tube envelope is 21 mm in diameter and, excluding the B8A base pins, is 53 mm tall.References: Data-sheet & 1040. Type EF40 was first introduced in 1948. See also 1948 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | h | a | ic | g3 | g1 | g2 | k,s | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | gm |
| 6.3 | 0.2 | 250 | 140 | -2 | 3.0 | 0.6 | 1.8 |
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Updated January 03, 2019.
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