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CV5188, GE, special quality military, 5687WA, 5687WB, GE
CV5188, GE, special quality military, 5687WA, 5687WB, GE
The JAN-GE 5687WB tube has black anodes, copper grid posts, and a halo getter. This 5687-WB tube is noted for being an excellent driver tube for push-pull amps, and also in various OTL headphone amps.
