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6A8GSensibly equivalent¶ to:See also:
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The 6A8G is a heptode or pentagrid mixer and is typical of the 1930/40s frequency changer. The triode oscillator is formed between the cathode and g2 acting as an anode, and has to generate a peak to peak voltage of 25 Volts. The mixer is screened by G3 and G5 with the signal injected into the oscillating electron stream at the top cap g4.![](../pics/aaa1130a.jpg)
The central cathode tube surrounded by the five grids they appear to be equally spaced. It is not possible to see if g2 is wire wound or just a pair of rods.The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 99 mm tall.References: Data-sheet, 1040 & 1043. Type 6A8G was first introduced in 1937. See also 1937 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc | ![](../static/key.gif) m | h | a | g3,g5 | g1 | g2 | h | k | g4 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 6.3 | 0.3 | 250 | 100 | -3 | 5 | 2.7 | 0.3M | 0.49 |
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Updated January 17, 2013.
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