The guy who will be doing the alignment does not have a tube tester so having him test is not an option. With respect to the tubes I was trying here’s what I’ve got:
12AT7 – Telefunken and RCA
6BN4A – RCA, GE, and Zenith
6AU6A – IEC (Japan) and RCA
6CS6 – Zenith
6BN8 – RCA
6U8 – Raytheon
12AU7 – Telefunken, GE, Sylvania
These all came from a ham swap, so no real guarantee they are new. The tubes that have been in the unit since I got it several years ago are McIntosh, mostly rebranded RCA.
12AT7 – Telefunken and RCA
6BN4A – RCA, GE, and Zenith
6AU6A – IEC (Japan) and RCA
6CS6 – Zenith
6BN8 – RCA
6U8 – Raytheon
12AU7 – Telefunken, GE, Sylvania
These all came from a ham swap, so no real guarantee they are new. The tubes that have been in the unit since I got it several years ago are McIntosh, mostly rebranded RCA.