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X142Sensibly equivalent¶ to:
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The X142 is an early all glass triode hexode from 1948 and was designed as oscillator and mixer for superhet receivers, and the hexode section was designed to operate with an AGC control voltage. The 100 mA heater was intended for universal (AC/DC) sets, and this explains the low anode voltages.The triode oscillator had to supply a peak to peak insertion voltage of 13 Volts.Thanks to Mark Mallison for sending the image.The thin glass tube envelope is mm in diameter and, excluding the B8A base pins, is mm tall.References: Data-sheet, Data & 1040. Type X142 was first introduced in 1950. See also 1950 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | h | a | a(t) | g(t),g3 | g2,g4 | g1 | k | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 14 | 0.1 | 200 | 85 | -2 | 3 | 3 | 1M | 0.75 |
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Absolute Maximum Operating Conditions¶
| Va | mAa |
| 100 | 3.1 |
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Updated February 26, 2023.
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