(!!) (Recommended Pair) CX-112A Cunningham Balloon engraved base used/good 1930 era (6.2ma and 7.0ma) (same Gm)

1 pair) CX-112A Cunningham Balloon engraved base used/good 1930 era in white boxes

1 tube) 6.2ma Gm=1600

1 tube) 7.0ma Gm=1600

Vplate = 180V

Vgrid = -13.5V

Good used Ma = 5.5 – 7ma

Good used Gm = 1400-1600

stamped circular plate structure similar to RCA / Cunningham UX-112A and CX-112A

– RCA Radiola 16 from 1928