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(!!!) (SINGLE) 6F8G National Union parallel dark gray plates 1950 era (11.2ma and 12.8ma)

(!!!) (SINGLE) 6F8G National Union parallel dark gray plates 1950 era (11.2ma and 12.8ma)

$ 52.99

6F8G National Union parallel dark gray plates 1950 era

1 section) 11.2ma Gm=2600

1 section) 12.8ma Gm=2800

not a pair

 

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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