(!!) (Best GE Pair) 6AC7 NOS 1960's - 1970's (13ma/13.5ma)

1 pair) 6AC7 GE NOS 1960's - 1970's

1 tube) 13.0ma Gm=10,000

1 tube) 13.5ma Gm=10,700

Good Ma = 7-10ma

Good Gm range 8000-10,000

- Mr. Liang Audio 845-3
- Welbourne Laurel IIx SET (WE 300B)
- JAS Bravo 2.3 integrated amp