(!) (Best Pair #4) JAN-6528A Cetron USA NOS and like new 1980-1989 (94/127mA and 97/134ma)

1 tube) JAN-6528A Cetron NOS and like new 1980-1989

1 tube) 94/127ma Gm=22,600/23,500 NOS 1989 slightly tilted glass

1 tube) 97/134ma Gm=22,800/24,200 like new 1980

Vplate=140

Vgriod=-10

NOS mA = 100-120mA+

NOS Gm range 24,000-30,000

graphite plates