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13EM7 Sylvania NOS 1960's (1.6/53ma) best single

13EM7 Sylvania NOS 1960's (1.6/53ma) best single

$ 9.99

13EM7 Sylvania NOS 1960's

1 section) 1.6ma Gm=1700

1 section) 53ma Gm=8300

 

 

Good mA triode #1 = 1.2-1.4ma

Good Gm triode #1 =1400-1600

 

Good mA triode #2 = 30-40ma

Good Gm triode #2 = 5500-7000

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