(!!) (BEST VALUE PAIR) 8417 Sylvania rebranded GE NOS in white boxes 1970's (86ma and 84ma)

1 pair) 8417 Sylvania branded GE 1970's

1 tube) 1976 (JK)

Ma plate=86ma

Ma screen=3.5ma

Gm=20,000

1 tube) 1972 (RF)

Ma plate=84ma

Ma screen=6.3ma

Gm=18,000

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good NOS Ma range 85-100ma

Good Gm = 21,000-23,000

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good NOS Ma range 80-110ma

Good NOS Gm = 20-23,000

Recommended For:

- UFO

- Fisher SA-1000

- Dynaco

- Quicksilver

- Dynaco Mark VI introduced in 1976

- Gibson

- Bogen

- Harmon Kardon

- Gibson-Standel SG-410 amp