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Large and small thyratrons - photo by Eric Barbour
Large General Electric hydrogen thyratron, used in pulsed radars, next to miniature 2D21 thyratron used to control relays. Photo taken 2004.
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This image was originally uploaded on en.wikipedia.org. File history:
05:45, 16 September 2004 . . EricBarbour (10803 bytes) (Large and small thyratrons - photo by Eric Barbour {{PD}})
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