Log-in
(!!!) (Best Single) 6F8G Philco by Sylvania parallel black plates 1940's (8.6ma and 8.8ma) 1-2% section balance

(!!!) (Best Single) 6F8G Philco by Sylvania parallel black plates 1940's (8.6ma and 8.8ma) 1-2% section balance

$ 54.99

6F8G Philco by Sylvania parallel black plates 1940's

1 section) 8.6ma Gm=2700

1 section) 8.8ma Gm=2700

 

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
Scroll to top