(!!!) (1 Pair) 6J7 RCA Radiotron used/good 1940's (1.7ma and 1.8ma)

1 pair) 6J7 RCA Radiotron used/good 1940's

1 tube) 1.7ma Gm=1100 

1 tube) 1.8ma Gm=1200 

Matched on Amplitrex

Good Ma range 1.6-2.0ma

Good Gm range 1100-1200
 

(also see 1620 which is a low noise 6J7)

- Western Electric 124C amp, 91A clone