(!!!) (Best Single #3) 8417 Sylvania NOS 1970 era (106.5ma) Title: 8417

8417 Sylvania NOS 1970 era a few very small vertical scratches on base

Iplate= 106.5ma

Gm= 21,400

Iscreen=6.7ma

Tested on Amplitrex:

Vplate=300V

Vscreen=300V

Vgrid=-12V

Good Ma range 90-110ma

Good Gm = 20-23,000

Recommended For:

– UFO

– Fisher SA-1000

– Dynaco

– Quicksilver

– Dynaco Mark VI introduced in 1976

– Gibson

– Bogen

– Harmon Kardon