Fritzi Scheff demonstrating Magnavox for Fifth Liberty Loan in New Yor...
American actress Fritzi Scheff demonstrating a Magnavox public address system in New York City to promote the Fifth Liberty Loan, a US government war bond issue to pay for World War 1. The Fifth Liberty Bond w... More
Woman tuning radio 1923
Woman tuning early radio, from 1923 radio magazine. Broadcasting had just begun in 1920 and vacuum tube radio receivers like this had just come on the market.. They ran off batteries, usually a 3-6V storage b... More
Horn loudspeaker truck 1929
A prototype horn loudspeaker driven by compressed air and an "artificial larynx" used as a portable public address system in Los Angeles, California, USA in 1929. The inventors tried to imitate human vocal cor... More
Horn speaker with girl - A woman sitting in a chair with a large speak...
Large antique horn loudspeaker from 1927 electrical engineering magazine, with girl sitting in mouth to show the scale. Before cone-type loudspeakers took over around 1930, radios and phonographs used horn lo... More
Klipschorn speaker drawing 1948
Drawing of the Klipschorn loudspeaker manufactured by Klipsch Audio Technologies from 1948. The Klipshorn is a high fidelity speaker system whose notable feature was its folded bass horn system, which is open ... More
Lansing Iconic multicell horn speaker 1937
The Lansing Iconic high fidelity loudspeaker from 1937 incorporating its model 808 multicell high frequency horn (top) and model 815 cone woofer. 29 1/2 in. high, 25 1/2 in. wide, 19 1/2 in. deep. It ret... More
Portable 5W public address system 1929
A portable 5 watt vacuum tube public address system the Unipac made by Silver-Marshall Co. from 1929. From R to L it consists of a phonograph needle pickup for playing music from a mechanical phonograph, a We... More
Theater horn loudspeaker 1928
Large horn loudspeaker from 1928 built for use in movie theaters and concert halls. Because early vacuum tube audio amplifiers couldn't produce much power, and horn loudspeakers can produce about 10 dB more ... More
Gigantofon Marconi. Second Polish Republic
Polish Marconi horn speaker Polski: Gigantofon Marconi z Warszawy Public domain photograph of 1920s-1930s Poland, free to use, no copyright restrictions image - Picryl description
Radio for everybody; being a popular guide to practical radio-phone re...
Identifier: radioforeverybod00lesc (find matches) Title: Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of th... More