For my M-60 3.3, I have been using the Sophia or Full Music 6SN7 tubes and I think they are better than any NOS RCA or whatever. But, I may try the Shuguang sometime though.
On the power Tubes I purchased (36) 6AS7G 1970 vintage new from Russia. Took about a month to get them. They have been problem free during the last 3 months that I have owned them.
ozzy
On the power Tubes I purchased (36) 6AS7G 1970 vintage new from Russia. Took about a month to get them. They have been problem free during the last 3 months that I have owned them.
ozzy