File:Amateur radio installed in car 1919.jpg

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Amateur_radio_installed_in_car_1919.jpg(680 × 473 pixels, file size: 66 KB, MIME type: image/jpeg)

Summary[edit]

Description
English: An amateur radio set installed in a car by A. H. Grebe, a radio manufacturer of New York in 1919, who is shown speaking into the microphone. The bulky vacuum tube set is visible in the back seat. It used medium wave frequencies around 2 MHz, requiring the cumbersome "inverted L" wire antenna mounted on the bumpers, which could be quickly put up and taken down and stowed under the car's chassis. The car's body was used as a counterpoise. The radio set was powered by a separate storage battery, with a small dynamotor to generate high voltage for the tubes anode supply. Grebe noted that he could hear other cars approaching on the road, as the receiver would pick up the radio noise from their unshielded spark plugs. Broadcasting began in 1920, about the time vacuum tube radio receivers became available, sparking a "radio craze" during the early Roaring 20s. Many car owners installed home radio sets in their cars.as a novelty. Car radios weren't manufactured until 1930, and did not come standard in vehicles until a number of years later.

Caption:"CUMBERSOME - BUT ESSENTIALLY PRACTICAL. Here is a real antenna, easily dismantled, that A. H. Grebe, of New York, uses for transmitting and receiving."


Français : Un radioamateur parlant dans le microphone dans une voiture a New York en 1919. Le volumineux émetteur-récepteur radioélectrique est visible sur le siège arrière. Utilisant les ondes moyennes de 2 MHz, nécessitant la lourde « L inversé antenne "de fil montés sur les pare-chocs, ce qui pourrait être rapidement mis en place et pris vers le bas. La radiodiffusion a commencé en 1920, au temps de tubes sous vide récepteurs radio sont devenus disponibles, provoquant un "engouement radio" au début des années 20. Beaucoup de propriétaires de voitures installés des postes de radio à la maison dans leurs voitures (une nouveauté). Les autoradios n'ont pas été fabriqués jusqu'en 1930, et ne sont livrés en standard dans les véhicules jusqu'à un certain nombre d'années plus tard. Légende: " . Lourdeur - mais essentiellement pratique Voici une antenne réelle pour transmettre et recevoir, facilement démontables par les utilisateurs. "
Date
Source Retrieved March 7, 2014 from Frederick Siemens, "Radio on your motor car" in Popular Radio magazine, Popular Radio, Inc., New York, Vol. 2, No. 4, December 1922, p. 249 on Google Books. Picture originally published in in A. H. Grebe, "The Auto Radiophone" in Radio Amateur News magazine, August 1919, p. 58,59
Author Picture credited to Pacific and Atlantic

Licensing[edit]

Public domain
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