@zek4u One 12AX7 is a regulator for the driver stage. There’s also a neon voltage reference tube underneath it.
Yeah, it should come with an upgrade option with NOS Telefunkens. I run Treasure12AX7 LS and find them better than the Teles (after break-in of about 20 hours)
http://psvanetube.com/wordpress/store/products/shuguang-custom-12ax7-lx-special-edition-pair-low-noi...
Yeah, it should come with an upgrade option with NOS Telefunkens. I run Treasure12AX7 LS and find them better than the Teles (after break-in of about 20 hours)
http://psvanetube.com/wordpress/store/products/shuguang-custom-12ax7-lx-special-edition-pair-low-noi...