(!!!) (Best Pair #1) 6F6 RCA metal can NOS 1966 (40ma and 39.6ma) 1-2% matched

1 pair) 6F6 metal can NOS 1966 (BD) same date codes

1 tube) 40.0ma Gm=2680

1 tube) 39.6ma Gm=2700

Matched on Amplitrex

Good NOS Ma = 30-35ma

Good NOS Gm = 2300-2500