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ECF80Sensibly equivalent¶ to:See also:
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The ECF80 was designed for operation as a mixer up to 220 MHz. As 1950s television receivers tended to use the PCFnn 300 mA valves.The triode is the oscillator and has to produce 5 V pk-pk signal. The screened pentode is the mixer. The valve has two cathodes so two independent valves are sited in the one envelope.The thin anode sheet is ribbed for stability and unlike ECF80 the Pentode grids are not visible. The triode can be seen on the left. The triode grid is wound on copper supports as is ther suppressor grid of the pentode.The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.References: Data-sheet & 1040 Type ECF80 was first introduced in 1954. See also 1954 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a(t) | g1 | g2 | h | h | a | k,s,g3 | k(t) | g1(t) |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 6.3 | 0.43 | 250 | 180 | -5.8 | 5.7 | 1.4 | 1.5M | 5.5 |
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Absolute Maximum Operating Conditions¶
| Va | Vg | mAa | ra | gm |
| 100 | -2 | 14 | 4K | 5 |
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Updated March 08, 2020.
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