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8417 GE used 1970 era (75ma)

8417 GE used 1970 era (75ma)

$ 59.99

1 tube) 8417 GE used 1970 era

75ma

Gm=18,000

 

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good used Ma range 70-90ma

Good used Gm = 17,000 - 19,000

 

 

For:

- UFO

- Fisher SA-1000

- Dynaco

- Quicksilver

- Dynaco Mark VI introduced in 1976

- Gibson

- Bogen

- Harmon Kardon

See more: vacuum tube
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