File:Museo de la Ciudad, Defensa 229 - Muestra sobre radiodifusión.jpg

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Español: Museo de la Ciudad, ubicado en la calle Defensa al 223, muestra sobre radiodifusión (2017).
English: A portable crystal radio at a 2017 broadcasting exhibit at City Museum, 223 Defensa Street. Made in Sweden since 1927 by Stern & Stern and aptly named in Finnish 'Herttaässä-kidekone' (Heart Crystal) for the red heart-shaped pointer on the dial. The raised tube in the rear houses the fragile cat's-whisker detector. This is a passive design, without any battery or mains connection. More [1], [2]
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Author Sergio Moises Panei Pitrau

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current21:40, 3 March 2018Thumbnail for version as of 21:40, 3 March 20182,472 × 3,296 (1.12 MB)GelpgimLa22 (talk | contribs)User created page with UploadWizard

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