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EF80Sensibly equivalent¶ to:See also:
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The Cossor 6BX6 is equivalent to the Mullard EF80 but here we have an EF80 with no other identification than a plus sign.Comparison with other EF80's reveals that the matching construction is that of Cossor's version and the green paint is distinctive.Electrically the EF80 is an internally screened pentode and was a workhorse of the VHF TV receiver and was much used for RF, IF, and video amplification in 405 line television receivers.![](../pics/aaq0217a.jpg)
The screen is typical Cossor and so are the mica's.The thin glass tube envelope is 20 mm diameter and excluding the B9A base pins stands 59 mm high.References: Data-sheet & 1040 Type EF80 was first introduced in 1950. See also 1950 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ![](../static/key.gif) k | g1 | k | h | h | s | a | g2 | g3 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 6.7 | 0.3 | 170 | 170 | -2 | 10 | 2.5 | 0.4M | 7.4 |
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Updated February 12, 2016.
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