The 8P13A is believed to be a screened amplifier pentode introduced in 1938 and a variant of the 13SP. This version has the Ct8 base and the similar Mullard SP13C has a B7 base. The use would have been for IF amplification in radio receivers.The classic envelope is 41 mm in diameter and, excluding the Ct8 base pins, is 101 mm tall.References: Private communication. Type 8P13A was first introduced in 1938. See also 1938 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc |  m | h | h | k | g3 | nc | g2 | a | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | ra | gm |
| 13.0 | 0.2 | 200 | 100 | - | 3 | 1.3M | 2.2 |
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Updated January 08, 2022.
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