The 12AY7 (also called a 6072 or 6072A) is a very sweet tube and every tweed amp from the 5E3 & up used one in the V1 position.  The 5E8A low power Twin used them in the first three positions to get that extra smooth tone that it’s known for.  Now for my opinion on the 12AY7, and while someone else’s thought may vary I think most would agree with me. Continue reading →