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12AU7 Raytheon Black Ribbed Plates used/like new 1958,

12AU7 Raytheon Black Ribbed Plates used/like new 1958, "D" getter halo, very good printing (Gm=1355/1375)

$ 49.99

1 low noise tube) 12AU7 Raytheon Black Ribbed Plates used/like new 1958, "D" getter halo, very good printing (Gm=1355/1375)

 

Good Gm range 1300-1600

Tested on Max-Preamp

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