File:Crosley 122 "Super Buddy Boy" radio receiver 1931.jpg
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Summary
| Description |
English: An antique vacuum tube radio receiver, the Crosley model 122 "Super Buddy Boy", from 1931. This was a superheterodyne with 7 tubes. It had a dynatron local oscillator circuit with a 175 kHz IF, a dynamic cone speaker with a field coil instead of a permanent magnet. It retailed for $65. |
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| Author | Unknown author |
| Permission (Reusing this file) |
This 1931 issue of Radio News magazine would have the copyright renewed in 1959. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. Search of the Renewals for Periodicals for 1958, 1959, and 1960 show no renewal entries for Radio News. Therefore the copyright was not renewed and it is in the public domain. |
Licensing
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:56, 2 May 2021 | | 307 × 298 (41 KB) | Materialscientist | tidied |
| 18:37, 3 November 2015 |  | 307 × 298 (17 KB) | Chetvorno | User created page with UploadWizard |
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