13EM7 Sylvania branded GE NOS 1963 (1.5/34ma)

1 tube) 13EM7 Sylvania branded GE NOS 1963

1.5ma Gm=1700

34ma Gm=6600

Good mA triode #1 = 1.2-1.4ma

Good Gm triode #1 =1400-1600

Good mA triode #1 = 30-40ma

Good Gm triode #1 = 5500-7000