6C8G Raytheon round black plates used/tests like new 1940”s (3.6/3.4ma)

1 tube) 6C8G Raytheon round black plates used/tests like new 1940”s – some small chips off bottom edge of base – see photo #2

3.6ma Gm=1700

3.4ma Gm=1500

Tested in Amplitrex

Vplate = 250V

Vgrid = -4.6V

Good NOS Ma = 3ma

Good NOS Gm 1500-1600

dual-triode

You can buy an adapter socket on EBAY to sub this tube for a 6SL7GT