Line Magnetic quality

@ geek101



Try Ssl7 first.

It has the most effect .

I am happy with Brimar

True NOS Gain Tested Brimar England CV1985 / 6SL7GT Vacuum Tube Brown Base | eBay


I also have ECC35 recommend by other folks. But it is in my storage. I may try it in 2 weeks to compare it with excellent Brimar.

I am also happy with Amperex Sn7

https://www.ebay.com/itm/PAIR-OF-6SN7GTB-AMPEREX-TUBES-NEW-6SN7-NOS-NIB-Vacuum-Tubes-Bugle-Boy/26392...

although I have Sylvania Bad Boys which I may try in a month or so.


Thomas

geek101

Although you didn't ask about the 518IA , for what it is worth in my 518IA I swapped out all of the tubes except the 845s and went with NOS Tung Sol 5751s (prefer the slightly lower gain vs using NOS 12ax7s in this amp) ,  RCA 5AR4 rectifier, and  GE 6L6GCs

@migueca

Your favorites are out of my budget, but I’ve been looking at the 88AI and wonder what the differences between 88AI and 34AI are. I can use KT88 in both, so what makes the 88AI a better choice if I wanna use KT88 tubes? The 34AI seems to be a better choice if I wanna tune the sound by tube rolling due to the many types of tubes I can use. But maybe there are only a few of the choices that really are interesting?

Do you know the brand of the stock tubes in 34IA?

I have a 216i and have changed out the LM tubes with Genelex Gold Lion reissue. Also for the preamp tubes I have found NOS military made USA General Electric and Sylvania tubes sound fantastic.