(!!!!) (Factory Matched Pair) 8417-P Sylvania NOS same build 1960's (92ma and 92.5ma)

1 matched pair) 8417 Sylvania NOS 1960's

1 tube) 

Iplate=92ma

Iscreen=4.0ma

Gm=21,400

1 tube) 

Iplate=92.5ma

Iscreen=3.8ma

Gm=21,500

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good used Ma range 90-110ma

Good Gm = 21-23,000

For:

- UFO

- Fisher SA-1000

- Dynaco

- Quicksilver

- Dynaco Mark VI introduced in 1976

- Gibson

- Bogen

- Harmon Kardon