My favorite Old Stock 12AU7 is the Amperex made in Heerlen Holland around 1960. These are truly great especially if you can find real/honest 7316s at a decent price. I also like the Blackburn Mullard tubes for their rich warm tone. I have heard read only really good things about the current production Gold Lion as suggested. Hope that helps . The Heerlen tubes can get very pricy.
New tubes for Cary 303T
Any recommendations for changing tubes in Cary 303T?
I now have the stock tubes, but would like to try a warmer alternative where I can hear a bigger difference when switching from SS to tube output.
I now have the stock tubes, but would like to try a warmer alternative where I can hear a bigger difference when switching from SS to tube output.