Not sure which type of tubes you’re looking for the Jolida, but if the type is ECC81 aka 12at7 then look for vintage Sylvania Gold Brand with gold pins - this is amazing tube! I use them in my amp and those tubes replaced military Telefunken ECC801S. None of the modern tubes can compete with Telefunken ECC801S, but if you can’t find Telefunken (or it’s too expensive) try Sylvania Gold Brand and ignore modern crap. I also use Matsushita pinched tails tube of the same type.
