(!!!) (Best Overall Pair) 286A Western Electric “”top printing”” mesh-plate NOS 1942-1945 (6.4ma and 6.6ma)

1 pair) 286A Western Electric “”top printing”” mesh-plate NOS 1942-1945, very large getters

1 tube) 6.4ma Gm=1200

1 tube) 6.4ma Gm=1200

Variable-mu voltage amplifier pentode with cathode

Vfil = 2V @ 1.6A

Vplate=180

Iplate = 5.5-6ma

Gm=1100-1200