That's correct. There is no one currently manufacturing any flavor of the 6AS7G. That said, it's hardly relevant for the small number of tubes that the current audio business requires, versus the mountains of Russian and Chinese NOS military tube stockpiles there are. One can still easily buy 100 tube cases of the very nice Russian 6H13C. 25 piece boxes run $150.
3/29/16 at 9:42am