(!!!) (Best Overall Single) 6528A Cetron like new 1987 (138/144mA) (Highest mA and Gm)

1 tube) JAN-6528A Cetron like new top getter like new

1 section) 138ma Gm=26,800

1 section) 144ma Gm=27,000

Vplate=140

Vgriod=-10

NOS mA = 110-120mA

NOS Gm range 25,000-30,000

graphite plates