. QST . LEARN ! Build up your code speed quickly . . a few minutes a day spent with thispractice set can boost you over that includes a constant frequency buzzerand key mounted on a 4x6 molded Bake-lite base. May be used singly or in pairs forcode practice. Cat. No. 114-450 Net Price E. F. JOHNSON COMPANY NOW INSTOCK. HALLICRAFTERSSX-96 Amateur $

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915