RARE MATCHED PAIR OF BRIMAR 12AX7 6057 CV492

1960s  PRODUCTION

THESE CAME TO ME AS IS IN PLAIN BOXES , SO I'M NOT SURE IF THEY EVER HAD A PRINT 

POSSIBLE OEM TUBES 




AVO VCM163 TESTED




TUBE 1 - Ia  1.35/1.3                gm  1.7/1.7

TUBE 1 - Ia  1.2/1.3                  gm  1.8/1.8






100% = Ia 1.2   gm 1.6




PLEASE SEE MY OTHER AUCTIONS