Marvel Posted February 8, 2009 Share Posted February 8, 2009 I've got a bunch of 12AU7, some 12AX7 tubes... and more, GE and RCA, some Sylvania. Josh pulled them out of some old gear the Physics Dept. was throwing out at school. How can I get an idea of the dates of these? Really interested, since I just got my Tubes4hifi front end board for my ST-70. I'm not real happy with my Curcio board, and I plan on doing this as the lo gain version with 12AU7s. Bruce Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted February 9, 2009 Share Posted February 9, 2009 HarryO might be able to cross reference them for you. Quote Link to comment Share on other sites More sharing options...
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