(!) (1 Pair) 6197=6CL6 RCA gray plate NOS 1968 (25ma and 25ma)

1 pair) 6197=6CL6 RCA gray plate NOS 1968

1 tube) 25ma Gm=8700

1 tube) 25ma Gm=8500

Good mA range 25-30ma

Good Gm range 10,000-11,000