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(!) (#4 13EM7 PAIR) 15EA7=13EM7 GE branded Zenith black base NOS 1970's

(!) (#4 13EM7 PAIR) 15EA7=13EM7 GE branded Zenith black base NOS 1970's

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Sorry, this product is sold out!

1 pair) 15EA7=13EM7 GE branded Zenith black base NOS 1970's

tubes plugged into octal sockets for picture

1 tube) 1.9ma/26ma Gm=2000/5300 taller

1 tube) 1.9ma/30ma Gm=1900/4700

Matched on Amplitrex

Good Ma triode #1 = 1.3-1.4ma

Good Gm triode #1 =1500-1600

Good Ma triode #1 = 30-40ma

Good Gm triode #1 = 5500-7000

 

- Modwright

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