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(!!) (Best Pair) 13EM7 Sylvania NOS 1960 era (1.4/56ma and 1.8/48ma)

(!!) (Best Pair) 13EM7 Sylvania NOS 1960 era (1.4/56ma and 1.8/48ma)

$ 29.99

1 pair) 13EM7 Sylvania NOS 1960 era

1 tube) 1.4ma Gm=1600 and 56ma Gm=8000

1 tube) 1.8ma Gm=1800 and 48ma Gm=7700

 

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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