Asianometry always does a great job with this stuff, although I find myself grimacing when he speaks positively about Sarnoff. Nevertheless the tube history is good (although he fails to mention that De Forest never figured out how his tubes worked).
I have four Nuvistors! They are in a 2 meter converter from Parks Electronics of BEAVERTON, OREGON. I may have this wrong, but I think the video said the Nuvistors were very expensive. This can't be right. Gemini AI says the 6CW4s in my Parks device sold for $1.50 to $2.50 in 1961.
Three cheers for the Nuvistor! I may try to see if they still work.
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