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B309Sensibly equivalent¶ to:See also:
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The M-OV B309 is labelled as MWT (Marconi's Wireless Telegraphy) and was sold for professional communications systems. It is a double triode equivalent to the Mullard ECC81. The device was designed for RF use and is of the low impedance type first adverts are from 1953.The thin glass tube envelope is 20 mm in diameter and excluding B9A base pins the length is 48 mm.References: Data-sheet & 1040. Type B309 was first introduced in 1953. See also 1953 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |  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 | 
| 6.3 | 0.3 | 250 | 2.0 | 10.0 | 10,000 | 5.5 |
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Updated March 31, 2017.
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