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(!!) USN-5687WA Tungsol black plates

(!!) USN-5687WA Tungsol black plates "U" getter used/good 1956 (27.5/28.5ma)

$ 39.99

1 low noise tube) USN-5687WA Tungsol black plates "U" getter used/good in white boxes 1956

27.5ma Gm=10,000

28.5ma Gm=10,200

 

Tested on Amplitrex 

Good used Ma range 25-30

Good used Gm range 9000-11,000 

 

  

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