13EM7 Sylvania branded GE NOS 1963 (1.5/34ma)
By Tube World
$ 9.99
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
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