(!) (Pair) 12AU6 RCA NOS 1973 (9.2ma and 9.2ma) 1-2% matched

1 Pair) 12AU6 RCA NOS 1973

1 tube) 9.2ma Gm=5100

1 tube) 9.2ma Gm=5000

Tested on Amplitrex

Good Ma = 8-10ma

Good Gm = 5000-5400