Playing around with some “new” NOS tubes that just showed up, as well as the 6SN7 tube adapters to use them in the Freya+…
Raytheon/Baldwin 12AU7’s on the left, GE 6CG7 on the right. I also have a pair of GE 6FQ7’s, which are identical to the 6CG7, but the 6CG7 utilizes a shield between the two plates.
