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
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth


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