(!!!!) (Best Overall Pair) 6528 Raytheon graphite plates NOS and like new 1970 era (125ma/135ma and 119/129ma)

1 pair) 6528 Raytheon graphite plates NOS and like new 1970 era same build original boxes

1 tube) 125/135ma Gm=25,500/25,000 like new but probably is NOS small amount of staining above edge of metal base

1 tube) 119/129ma Gm=24,400/25,000 NOS

tubes branded CK-6528

boxes branded CK-6528A

Vplate=140

Vgriod=-10

NOS mA = 100-120mA

NOS Gm range 24,000-30,000

graphite plates