(!) (Best Pair) 6KT8 Sylvania NOS 1970”s (4.4/12ma and 5.2/13ma)

1 pair) 6KT8 Sylvania NOS 1970”s

1 tube) 4.4ma Gm=5200 and 12ma Gm=8600

1 tube) 5.2ma Gm=5800 and 13ma Gm=9200

triode/pentode