I was going to start a new thread and then I saw this one. I bought the new blue bottle EL34 ST.
OK, I just got my tubes in from Sophia Electric and have maybe 10 hours on them. Richard from SE talked me into trying the EL34 tubes. I told him I just want a rectifier tube for my Modwright PS 9.0 and he said try them and then send them back. Ha ha, what a devious trick. I will not be sending anything back. After letting them warm up a few minutes in my Linear Tube Audio ZOTL40 the sound was shrill and bright but after about 10 minutes a rapid change in sound character became evident and the magic started to appear. These are the absolute best new production EL34 tubes I’ve ever heard and after a little break in might best my NOS Mullard XF2 EL34 and my British NOS GEC KT77.
Lance