The SP13 screened amplifier pentode was introduced in 1934. This version has the Ct8 base and the similar SP13C has a B7 base. The use would have been for HF amplification in radio receivers. It is a non variable-mu valve and was displaced in favour of the variable μ pentode when TRF receivers gave way to mass produced superhet receivers.The classic envelope is 40 mm in diameter, and excluding the Ct8 base pins, is 104 mm tall.References: Data-sheet, 1040 & 1043. Type SP13 was first introduced in 1934. See also 1934 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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PDF scanned from an original document held by the museum |
Updated January 09, 2022.
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