(!) (Best RCA Pair) 6SG7 RCA metal can NOS 1961 (10.0/10.4ma)

1 matched pair) 6SG7 RCA metal can NOS 1961

1 tube) 10.0ma Gm=4500

1 tube) 10.4ma Gm=4700

Matched on Amplitrex

Vplate=250V

Vscreen=125V

Vgrid=-1V

Good Ma 10-12ma

Good Gm=4500-5000