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KTW61MSensibly equivalent¶ to:See also:
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The KTW61 is a variable μ RF amplifier beam tetrode, and was first introduced in 1939. The literature classifies these valves as pentodes but the images show the bright beam plates. The M suffix denotes the presence of external screening paint.
The Osram brand printed onto the zinc loaded screening paint.Thanks to Anurag aggarwal for sending the Osram data-sheet.The classic envelope is 37 mm in diameter and, excluding the IO base pins, is 103 mm tall.References: Data-sheet, 1040 & 1043. Type KTW61M was first introduced in 1939. See also 1939 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc |  m | h | a | g2 | g3 | nc | h | k | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | 
| 6.3 | 0.3 | 250 | 100 | -3 | 8.0 | 2.7 | 0.46M | 2.9 |
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PDF scanned from an original document held by the museum |
Updated January 08, 2022.
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