1940s era 12AU7 and 12AX7s

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In Reply to: RE: Do they look like these? Yep posted by Mechans on May 7, 2015 at 13:10:47:

Some of the best 9-pin 12AU7 and 12AX7 tubes that I've used come from this era. Usually mil spec. It's hard to find nice strong, quiet NOS ones anymore.

I haven't tried any 12AT7 made in this time frame.

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Topic - RCA Black Glass 12AU7 1950s ? - Mechans 17:14:25 05/06/15 (4)

I suppose they are 40s production - Mechans 15:47:27 05/08/15 (0)

Do they look like these? - FenderLover 04:02:34 05/07/15 (2)

RE: Do they look like these? Yep - Mechans 13:10:47 05/07/15 (1)

1940s era 12AU7 and 12AX7s - FenderLover 18:28:26 05/07/15 (0)

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1940s era 12AU7 and 12AX7s - FenderLover 18:28:26 05/07/15 (0)

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