SELECTRON

SELECTRON

There actually was a Selectron Tube invented and marketed by RCA in 1946. It was a memory storage vacuum tube with many variations.
Trust me - THIS AIN'T THEM!
This Selectron tube box is from a self-service tube tester company with do-it-yourself testers placed in retail stores in the 1950s, 60s & 70s. Their tubes were 2nd rate replacement types.




Tube box courtesy of Cliff Wills.




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