(!!!!) (Recommended Pair) JAN-6189W Sylvania NOS 1974-1976 (9.2/10.2ma and 9.3/9.4ma) (Same Gm)

1 low noise pair) JAN-6189W Sylvania NOS 1974-1976

1 tube) 9.2/10.2ma Gm=2200/2300

1 tube) 9.3/9.4ma Gm=2300/2200

Matched on Amplitrex

Good Ma range 8-10ma

Good Gm range 1800-2200

- 6189 W is sub for a 12AU7 or 5814