(!!) (Recommended Pair) 6CB5A Sylvania branded Dumont NOS 1960's (82.5ma and 85ma)

1 pair) 6CB5A Sylvania branded Dumont NOS 1960's

1 tube) 82.5ma Gm=7500

1 tube) 85.0ma Gm=7900

Tested on Amplitrex

Vplate=175

Vscreen=175

Vgrid=-30

Iplate = 70-100ma (Good)

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