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13EM7 Sylvania branded GE NOS 1963 (1.5/34ma) Image 1
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13EM7 Sylvania branded GE NOS 1963 (1.5/34ma)

$8.00 $9.99


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13EM7 Modwright Oppo


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Preamp tubes
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  • Description

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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