(!) (Single) 6550 Tungsol black plate used/good 1950's (115ma)
$ 189.99
6550 Tungsol black plate used/good 1950's (2 side getters and 1 top getter) - 1 side getter is faded
115ma
Gm=9050
Tested on Amplitrex AT1000
Good used mA range = 110-130mA
Good used Gm=9,000-10,000
See more: vacuum tube
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 (Single) 6550 Tungsol black plate used/good 1950's (115ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_5a552369-ea2e-4f3c-a553-1a04800528c2.jpg?v=1762559628){kind=link}
 (Single) 6550 Tungsol black plate used/good 1950's (115ma) "Pin It")