The OTK17 (1P24B) is a sub-miniature valve with flying leads and the anode brought out to a top lead. It is a special quality Russian battery RF output pentode. The filament is 1.2 Volts at 0.25 Amp.![](../pics/abn0064a.jpg)
The envelope has ridges built into the inner walls and these hold the electrodes in place.![](../pics/abn0064b.jpg)
Even in this close-up no grid wires can be seen.![](../pics/abn0064c.jpg)
The Cyrillic lettering for 1P24B-B.![](../pics/abn0064d.jpg)
The ceramic spacer and the base leads.The thin glass tube envelope is 9 mm in diameter, and excluding the base wires is 42 mm tall.References: Observation & 3002. |
Updated April 27, 2016.
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