6F8G GE parallel plates NOS 1940”s (8.0ma and 8.4ma)

6F8G GE parallel plates NOS 1940”s

1 section) 8.0ma Gm=2500

1 section) 8.4ma Gm=2600

Tested on Amplitrex

Vplate=250V

Vgrid=-8V

Good Iplate = 7-10

Good Ma = 2400-2600

NOTES:

6F8G = (2) 6J5G inside 1 bulb

1 section has top cap for grid

1 section has internal grid connection

GE, Sylvania and Raytheon have mirror image parallel black plates

RCA and Ken Rad have staggered black ribbed plates