English: Ernst Jahnke crystal radio receiver, ca. 1924-1926. The radio is tuned to different stations by moving the slider (right) up or down the tuning coil. The device at top is the cat's whisker detector.
Deutsch: Ernst Jahnke Detektorempfänger, ca. 1924-1926.
Français : Ernst Jahnke poste a galène, ca. 1924-1926.
Nederlands: Ernst Jahnke kristalontvanger, ca. 1924-1926. De radio wordt op verschillende stations afgestemd door de schuif (rechts) langs de afstemspoel op en neer te bewegen. Bovenop de spoel bevindt zich de kristaldetector.
I, the copyright holder of this work, hereby publish it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.