Jim McShane, Viva Tubes, Vacuum Tube Values for new tubes are some I have dealt with And of course, Tube Depot and the others who pop up with a search. Then there is upscale if you can deal with them. Jim has some health issues and is running behind but is a good dealer. VTV has good prices and does the normal testing. Good luck & happy hunting.
Oh, NOS is Brent Jesse & another who's name escapes me.
Oh, NOS is Brent Jesse & another who's name escapes me.