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TDD2ASensibly equivalent¶ to:
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The TDD2A is a double diode triode for battery receivers. The function was as detector, AGC rectifier and first audio voltage amplifier in a superhet broadcast receiver. See also TDD2A for a slimmer version of the envelope.
The reverse is plain paint.The classic envelope is 44 mm in diameter, and excluding the B5 base pins is 106 mm tall.References: Data-sheet, 1040 & 1043. Type TDD2A was first introduced in 1934. See also 1934 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | tc |  a | a(d1) | f(-) | f(+) | a(d2) | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | 
| 2.0 | 0.12 | 135 | -1.5 | 1.95 | 25,000 | 1.2 |
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Thanks to Andy Cowley for supplying the above PDF datasheet. |
Updated April 03, 2014.
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