Last summer I picked up a lightly used Aric Audio Motherlode II. The gentleman I purchased it from,sent it with a pair of Ken Rad black glass VT231’s. I also don’t have much experience with the 6snl7 tubes. However most that I have tried,( some 50’s,60’s RCA’s,Sylvania’s,GE) don’t seem to match what I’m hearing with the KenRads. I do at some point plan on trying Psvane,and possibly Linlai globe type tubes.
