(!!) 6350 Sylvania black plates rebranded United "U" getter used/good 1950's (8.7/9.3ma)
By Tube World
$ 22.99
1 tube) 6350 Sylvania black plates rebranded United "U" getter used/good 1950's
1 section) 8.7ma Gm=4300
1 section) 9.3ma Gm=4300
Tested on Amplitrex
Vplate=150V
Vgrid=-5V
Good NOS Ma per section = 9-11ma
Good NOS Gm per section = 4500-5000
See more: vacuum tube
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 6350 Sylvania black plates rebranded United "U" getter used/good 1950's (8.7/9.3ma) "Pin It")