(!!!) (Best Pair) 6AF4A Sylvania NOS 1965 (22.5ma and 22.8ma)

1 matched pair) 6AF4A Sylvania NOS 1965

1 tube) 22.5ma Gm=7100

1 tube) 22.8ma Gm=7300

Matched on Amplitrex

Good NOS Ma = 15ma

Good NOS Gm = 6500

6DZ4=6AF4A

– Marantz 10B tuner