(!!) (Single) 6F8G National Union parallel plates like new 1950 (9.4ma and 8.0ma)

6F8G National Union parallel plates like new 1950

1 section) 9.4ma Gm=2500

1 section) 8.0ma Gm=2400

Tested on Amplitrex

Vplate=250V

Vgrid=-8V

Good Iplate = 7-10

Good Ma = 2500-2800

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