13EM7 GE branded Raytheon NOS 1960's (1.6/40ma)
$ 9.99
1 tube) 13EM7 GE branded Raytheon NOS 1960's
1.6ma Gm=1800
40ma Gm=5900
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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