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ECC81Sensibly equivalent¶ to:See also:
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The ECC81 was designed for RF use and is of medium impedance.Here we have a Zaerix device made in what was then East Germany and given as Made in GDR. The direct equivalence between the 12AT7 and ECC81 is made clear.![](../pics/aao0007a.jpg)
The reverse of the envelope.The thin glass tube envelope is 21 mm in diameter and excluding B9A base pins the length is 48 mm.References: Data-sheet & 1040. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ![](../static/key.gif) a(2) | g1(2) | k(2) | h | h | a(1) | g1(1) | k(1) | hct |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | ![](../static/pdflogo.gif)
| 6.3 | 0.3 | 250 | -2.0 | 10.0 | 10,000 | 5.5 |
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Updated March 12, 2022.
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