6F8G RCA gray ribbed staggered plates NOS no printing 1950 era (7ma/8ma)
$ 39.99
6F8G RCA gray ribbed staggered plates NOS no printing 1950 era in white box
7ma Gm=2500
8ma Gm=2600
Good Ma range 7-9ma
Good Gm range 2400-2600
NOTES:
GE, Sylvania and Raytheon have mirror image parallel black plates
RCA and Ken Rad have staggered black ribbed plates
6F8G dual triode = (2) 6J5G's triodes in 1 tube
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