The 20F2 screened RF pentode was designed for use in universal (ie no mains transformer) sets with a series connected heater chain. Mostly in television receivers at RF or as a sync separator.The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 52 mm tall.References: Data-sheet, 1040 & 3002. Type 20F2 was first introduced in 1949. See also 1949 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | h | a | s | g3 | g2 | g1 | k | h |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | gm |
| 11.0 | 0.2 | 135 | 135 | -1.3 | 27 | 6.5 | 10.6 |
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Updated February 15, 2013.
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