The Vacuum Tube’s Forgotten Rival
Cars That Think
MARCH 27, 2022
An old-fashioned triode vacuum tube does that using a voltage applied to its grid electrode. Naval Ordnance Laboratory , in Maryland, had figured out how to manufacture this alloy, which was soon marketed by an outfit called Arnold Engineering Co. As late as 1957, more than 400 engineers attended a conference on magnetic amplifiers.
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