The SD2 is a 2 volt battery triode designed for use as a detector or first stage audio amplifier.
The identification on the envelope carries the makers logo and brief details of operating characteristics. The attached data-sheet is taken from the Triotron 1931 booklet.The balloon envelope is 48 mm in diameter, and excluding the B4 base pins is 87 mm tall.References: Data-sheet & 1043. Type SD2 was first introduced in 1929. See also 1929 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 |  a | g1 | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | μ | 
| 2.0 | 0.14 | 150 | -3 | - | 10,400 | 2.0 | 21 |
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PDF scanned from an original document held by the museum |
Updated August 11, 2017.
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