The mystery radio!--Dr. Riggs granted 40 patents on revolutionary set based on entirely new principles. NEW YORK--Left, Donald F. Hastings, assistant to Dr. Riggs, discussing the amplifier with the inventor. This amplifier is but 5 inches wide by 3 inches high, yet it will fill the largest auditorium with music, it is asserted. Two of the revolutionary tubes are shown on top of the amplifier. The box contains a complete outfit for operating a set from house current. The set can operate on either A.C. or D.C. with identical quality and volume. 1797 photonegative 1926
Underwood & Underwood
Wilbur, Curtis D
Andrews, Philip Rear Admiral
Silver gelatin on glass
1 item, 4" x 5"
Currently stored in box 3.1.70 [227A].
emulsion deteriorated beyond use
Smithsonian Institution, National Museum of American History : Archives Center. P.O. Box 37012, Suite 1100, MRC 601, Constitution Ave., between 12th and 14th Sts., N.W., Washington, D.C. 20013-7012. Call 202-633-3270 for appointment. Fax: 202-786-2453