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(!!) (#1 5687 Tungsol used 1950's) 5687 Tungsol rebranded IBM bronze plates "U" getter used/very good late 1950's (32.5/39ma)
(!!) (#1 5687 Tungsol used 1950's) 5687 Tungsol rebranded IBM bronze plates "U" getter used/very good late 1950's (32.5/39ma)
By Tube World
$ 34.99
1 low noise tube) 5687 Tungsol rebranded IBM bronze plates "U" getter used/very good late 1950's
1 section) 32.5ma Gm=10,200
1 section) 39.0ma Gm=11,700
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 (#1 5687 Tungsol used 1950's) 5687 Tungsol rebranded IBM bronze plates "U" getter used/very good late 1950's (32.5/39ma) "Pin It")