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Pratt Radio Tubes

Pratt Radio Tube Company, Chicago?


First seen: 28-Dec-1923
Last seen: 28-Dec-1923

Brand(s): Pratt

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{v1} Tubular (___), "Pratt Radio Tube", brass base, tipped

An unusual tube, Pratt appears to have 'invented' a new tube design. It's not clear whether his tube was ever produced, or whether he ever acquired a patent. It's possible he was snatched up in a buyout and disappeared. This tube looks a bit like the Cossors.

If you know of more info about this tube, drop me a note.


Pratt Radio tube invention 
Pratt tube 





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