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(!!) 5687WA Sylvania black plates "O" getter like new 1960's (34.5ma/36.0ma)

$ 39.99

1 low noise tube) 5687WA Sylvania black plates "O" getter like new 1960's

1 section) 34.5ma Gm=11,000

1 section) 36.0ma Gm=10,900

 

Tested on Amplitrex

Vplate=120V

Vgrid=-2V

Good Ma range 28-35ma

Good Gm range = 10K-12K

 

7119 is best sub for a 5687 and visa versa

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