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KT61Sensibly equivalent¶ to:
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The KT61 is an audio output valve and features the standard 6.3 Volt heater that was introduced from America. The KT61 forms part of a series of very successful valves from M-OV and in this exhibit it is badged as a consumer Marconiphone device. The electrodes are obscured by the coating on the glass.![](../pics/aam0001a.jpg)
The KT61 Type designation is etched into the envelope.The classic envelope is 43 mm in diameter and, excluding the IO base pins, is 102 mm tall.References: Data-sheet, 1043 & 1040. Type KT61 was first introduced in 1939. See also 1939 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ![](../static/key.gif) m | h | a | g2 | g1 | nc | h | k |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | gm | Pout | D | ![](../static/pdflogo.gif)
| 6.3 | 0.95 | 250 | 250 | -4.4 | 40.0 | 7.5 | 10.5 | 4.3 | 8% |
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Updated January 07, 2022.
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