I've used all of the above (except green label) in my Music Reference RM5III preamp and found that, in my system, they break into two groups tonally. Of the O-getters, I love the Orange Globes the most. I agree with Tubelore Joe's evaluation. Very well balanced, great bass, airy, extended treble without etch or harshness. The A-frames all sound harsh by comparison to me, tonal balance tilted to much towards the highs. Of, course if that's to your tastes, ymmv.
Amperex 6DJ8 Tube Questions
I see many Amperex 6DJ8 tubes for sale. Bugle Boys, World Logo, A Frame, Orange Label, Orange World Logo, Orange Globe A Frames, etc. I read Joe's Tube Lore on AA and he was recommending the orange globe logo tubes as very good sweet tubes over the Bugle Boys. So what is the difference between the orange globes and the (1) orange globe A frames, (2) orange label, (3) orange world logo tubes?
Thanks
Thanks