[Doc Ewen and the horn, Harvard, 1951]
Ewen and the horn antenna, Harvard, 1951. (Image courtesy of Doc Ewen)



[Doc Ewen at Harvard 60ft dedication, 1956]
Ewen speaks at Harvard 60ft dedication, 1956. (Image courtesy of Doc Ewen)



[Doc Ewen and the horn, Green Bank WV, 2001]
Ewen and the horn antenna, Green Bank WV, 2001. (Image courtesy of Doc Ewen)