The 1T5GT is a battery audio output beam tetrode.In single ended output service the anode load would be 14,000 Ohms. The audio output is low, but respectable for a valve operating from dry cells and having a low filament current.We also have the 1B8GT that combines the 1T5GT and 1H5GT into a single envelope.The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 59 mm tall.References: Data-sheet & 1043. Type 1T5GT was first introduced in 1939. See also 1939 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |  nc | f+ | a | g2 | g1 | nc | f- | nc |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | Pout | D | 
| 1.4 | 0.05 | 90 | 90 | -6.0 | 6.5 | 1.5 | 250,000 | 1.15 | 0.17 | 7.5% |
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Updated January 06, 2022.
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