On 2022-08-11 13:27, Jeff Malins wrote:
Those are 7236 double triodes. Definitely a vacuum tube.

Given the layout, I think that is a picture of the core memory amplifiers on the SAGE (AN/FSQ-7) computer.

yep - a it look like a regular tube to me...

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Charles MacDonald  VA3CPY               Stittsville Ontario
[email protected]              Just Beyond the Fringe
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