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13EM7 Silvertone Sylvania low hours/like new 1963 (1.3/43ma)

13EM7 Silvertone Sylvania low hours/like new 1963 (1.3/43ma)

$ 7.99

1 tube) 13EM7 Silvertone Sylvania low hours/like new 1963

1.3ma Gm=1400

43ma Gm=7000

 

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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