(!!) (Recommended Pair) 6CS7 GE Canada NOS black plates 1965-1969 (18/11.2ma and 20/9.6ma) (close Gm)

1 pair) 6CS7 GE Canada NOS black plates 1965-1969

1 tube) 18ma Gm=4500 and 11.2ma Gm=2200

1 tube) 20ma Gm=4800 and 9.6ma Gm=2100

Tested on Amplitrex

Good Ma triode #1 = 10-11ma, Good Gm = 2000-2200

Good Ma triode #2 = 20-25ma Good Gm = 4000-4500

for:

Leben CS 600 integrated amp

Leben CS 660P power amp