(!!) (1 Pair) 6G6G RCA NOS branded Sylvania and GE 1940”s same build (16.2ma and 17.5ma)

1 pair) 6G6G RCA NOS branded Sylvania and GE 1940”s same build grayish/black round plate

1 tube) 16.2ma Gm=2300 branded Sylvania

1 tube) 17.5ma Gm=2300 branded GE – taller

Vplate=180V

Vscreen = 180V

Vgrid = -9V

Good Ma range 12-15ma

Good Gm range 2100-2300

– Emery Microbaby
– Space Tech Labs (Canada)