Have a gain stage (12ax7) tube (GE Longplate ca. 1963) getting a little noisy.
So ordered these...
12AX7 Mullard MATCHED PAIR New Old Stock in whiteboxes. Late 1960s vintage, Genuine Mullard "B" factory code (Blackburn) made in Great Britain, labeled for IEC Mullard and other brands of amplifiers. These have that sweet Mullard sound at a lower price! Very closely matched and selected pair of beauties!
and these...
E88CC / 6922 Amperex white PQ type, white label, HOLLAND made, gold pins. MATCHED PAIRS New Old Stock white Box. Fabulous original 1960s vintage white label HOLLAND made PQ type Amperex tubes. These are among the most difficult to find in the 6DJ8 NOS family. Ultra low noise, matched triode sections, heavily plated gold pins. Carefully matched to within 2 percent. Made and labeled for Mullard, last pair!
I don't have a lot of tube rolling experience, just what's mentioned above and just a smidge of 6922 rolling in ARC LS25 MK1. Also, I've never rolled the stock E-H 6922's in the Calypso. I feel I'm at a point in my audio lifecycle where I'm ready to experiment in the black art of "tube rolling."
Will report my findings in the coming weeks...