(!!) (Recommended Pair) 8068 GE Hewlett Packard scratch on glass and GE NOS 1970-1971 (46.5ma and 48ma) (Highest Ma)

1 Pair) 8068 GE NOS 1970-1971 same build

1 tube) 48ma and Gm=5200 (GE branded Hewlett Packard 1" long scratch on glass)

1 tube) 46.5ma and Gm=5750 (GE 1971)
 

Tested on Amplitrex

Vplate=500

Vscreen=125

Vgrid=-5

Good NOS Ma (Iplate)=40-46ma

Good NOS Gm=5200

Power Designs Inc. 1570