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(!!) (Best Pair) 8417 Sylvania NOS 1970 era same date codes (112.2ma and 114.5ma)

Name: (!!) (Best Pair) 8417 Sylvania NOS 1970 era same date codes (112.2ma and 114.5ma)
Brand: Tube World
SKU: 8417pair
Price: 228.88 USD
Availability: InStock

$ 228.88

1 pair) 8417 Sylvania NOS 1970 era same date codes

1 tube)

Ma plate=112.2ma

Ma screen=4.9ma

Gm=22,500

1 tube)

Ma plate=114.5ma

Ma screen=5.0ma

Gm=23,700

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good NOS Ma range 85-100ma

Good Gm = 21,000-23,000

For:

- UFO

- Fisher SA-1000

- Dynaco

- Quicksilver

- Dynaco Mark VI introduced in 1976

- Gibson

- Bogen

- Harmon Kardon

See more: vacuum tube

Tags: 1960's, 8417, power tubes, Quicksilver, RCA, Sylvania

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