Strelzoff J A (1 results)

Two part article from the July and August issue on the author's research into vacuum tube, illustrated with drawings and photos. Legitimate ex-college library (stamped "withdrawn") , bound into stiff cardbaord archival folder, SIGNED by author, who was a professor at the school. Very good. Lengthwise crack along top edge of folder, lightly age yellowed, otherwise text is tight, clean, paper crisp and unmarked. Early electricity; radio; electronics; vacuum tubes. …