(!!) (Best Pair) 8417 Sylvania NOS 1970 era same date codes (112.2ma and 114.5ma)
$ 219.99
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
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