OK, just got my tubes in from Sophia Electric. Richard talked me into trying the EL34 tubes as well. I told him I just want a rectifier tube but he said try them and then send them back. Ha ha, I will not be sending anything back. 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. I know this is a PS 9.0 rectifier thread but I had to mention it and I haven’t even installed the 274b but it’s next.