(!!) (#1 7551 Pair) 7551 RCA black plate branded Motorola NOS 1970”s (48ma and 48.2ma)

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

1 tube) 48.0ma Gm=5500

1 tube) 48.2ma Gm=5500

Vplate=250V

Vscreen=250V

Vgrid=-18V

Good Ma = 35-40ma

Good Gm = 5000-5300

Beam Terode

9 pins

12-15V filament

10 watts