They are in a bulk box of 200 tubes, not individual tube boxes, and I'm at work and do not have one of the tubes to take a picture of or look at in more depth.
Mine say 6DJ8 where the EI symbol is on your tubes with YUGOSLAVIA in smaller letters underneath.
I got these through one of my employers from Art Ferris. I don't think they had quite the perfect parameters for him to use in his retail products, but to me, they are just fine, but do require the tube coolers for longevity.
Mine say 6DJ8 where the EI symbol is on your tubes with YUGOSLAVIA in smaller letters underneath.
I got these through one of my employers from Art Ferris. I don't think they had quite the perfect parameters for him to use in his retail products, but to me, they are just fine, but do require the tube coolers for longevity.






