(!) 5687 GE rebranded Sylvania black plates "O" getter NOS 1960's (35.6ma/37.4ma)
$ 39.99
1 low noise tube) 5687 GE rebranded Sylvania black plates "O" getter NOS 1960's (tube is etched 5687)
1 section) 35.6ma Gm=11,900
1 section) 37.4ma Gm=12,100
Tested on Amplitrex
Vplate=120V
Vgrid=-2V
Good Ma range 28-35ma
Good Gm range = 11K-12K
7119 is best sub for a 5687 and visa versa
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 5687 GE rebranded Sylvania black plates "O" getter NOS 1960's (35.6ma/37.4ma) "Pin It")