On 16-03-18 03:12 PM, 'threeneurons' via neonixie-l wrote:
In "the West", most tube production, other than CRTs and microwave magnatrons, ended ~1975.
Some receiving type tube production continued in the US for a while after that, but for Military use. Other microwave tubes are/were also produced, even today satellites seem to use TWT transmitters.
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