RAM Labs for me too. Roger Modjeski has a vast knowledge of tube design, construction, and performance parameters, as well as amplifier circuits. He often provides tubes to other amp designers such as Mike Sanders (Quicksilver Audio) and Ralph Karsten (Atma-Sphere).
Tube vendor recommendations?
I’m looking for new tubes for some preamps and power amps. Any recommendations of tube vendors would be appreciated, preferably if you have had positive experiences with them. Thanks!