(!!) (BEST VALUE PAIR) 8417 Sylvania rebranded GE NOS in white boxes 1970's (86ma and 84ma)
$ 199.99
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
See more: vacuum tube
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 (BEST VALUE PAIR) 8417 Sylvania rebranded GE NOS in white boxes 1970's (86ma and 84ma) "Pin It")