Quote:
Originally posted by kc8adu
wasnt the 19vabp22 the last roundie tube upgrade?
thought i remembered installing a few.
they even had the black matrix treatment iirc
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19VABP22 is listed as a rectangular. Perhaps you were thinking of a similar number? The only roundies I can find listed with a number starting with 19 are the 19VP22 (CBS) and 19TP22 (DuMont) both from 1954.