File:Anonymous soldier with a foxhole radio, Anzio Beachhead.jpg
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Summary
| Description |
English: An unnamed soldier at the Anzio beachhead during World War 2 holds a foxhole radio, a crude crystal radio. During the war, soldiers were not allowed to use vacuum tube radios, because the regenerative and superheterodyne radios of the time radiated radio waves which would allow the enemy to locate them. Soldiers wanted to listen to radio broadcasts so they built crude crystal radios, which were safe. A common form, shown here, used a blue steel razor blade with a pencil lead pressed against its surface by a safety pin as a detector. The blue oxide coating on the blade formed a semiconductor diode which demodulated the radio signal, extracting the audio (sound) signal from the radio carrier wave. Photo taken for YANK magazine but never used. |
| Date | Taken in 1944 |
| Source | National Archives, Still Picture Branch |
| Author | United States Army |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:28, 26 April 2016 | | 2,807 × 3,000 (1.35 MB) | Bcarusella | User created page with UploadWizard |
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