Written on back of photograph, ''Doc' Charles David Herrold, father of radio broadcasting.' Established Herrold Laboratories, Herrold College of Engineering. Born Nov. 16, 1875, Fulton, Illinois. Moved to San Jose. Sent 1st wireless telegraph...
Jensen, Peter V.; Perham, Douglas; Albertus, F.; Radio--Transmitter-receivers; Arc Transmitter and Receiver; Men;
The First Arc Transmitter and Receiver built by Poulsen Wireless in 1910. Original photo in sepia tones, copies in colored and black and white. Shows Douglas Perham, F. Albertus and Peter V. Jensen.
De Forest, Lee, 1873-1961; Postcards; Radio--Receivers and reception; San Jose (Calif.); Santa Clara County (Calif.)--History; Technology;
Color postcard of Gilfilan Brothers of Los Angeles cathedral style home broadcast radio receiver. Written on back of postcard, "In the early 1920's, 'wireless' devices used by amateurs were wires and circuitry attached to a wood base, called a...
