(!!) (#1 7551 Pair) 7551 RCA black plate branded Motorola NOS 1970's (45.2ma and 46ma)

1 pair) 7551 RCA black plate branded Motorola NOS 1970's

1 tube) 45.2ma Gm=5450

1 tube) 46.0ma Gm=5400

Vplate=250V

Vscreen=250V

Vgrid=-18V

Good Ma = 35-40ma

Good Gm = 5000-5300

Beam Terode 

9 pins

12-15V filament

10 watts