(!!) (Recommended Pair) 6CB5A Sylvania branded Dumont NOS 1964-1966 (65ma and 66ma)

1 pair) 6CB5A Sylvania branded Dumont NOS 1964-1966

1 tube) 65ma Gm=7500

1 tube) 66ma Gm=7200

Tested on Amplitrex

Vplate=175

Vscreen=175

Vgrid=-30

Iplate = 70-100ma (Good)

Gm = 7,500 - 9,000 (Good)