(!!!) (SINGLE) 6F8G Sylvania parallel black plates like new 1940's (10.8ma and 9.2ma)
$ 49.99
6F8G Sylvania parallel black plates 1940's
1 section) 10.8ma Gm=3100
1 section) 9.2ma Gm=3000
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
See more: vacuum tube
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 (SINGLE) 6F8G Sylvania parallel black plates like new 1940's (10.8ma and 9.2ma) "Pin It")