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File:Single tube reflex receiver circuit.png

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Single_tube_reflex_receiver_circuit.png (428 × 345 pixels, file size: 9 KB, MIME type: image/png)

Summary

Description
English: The circuit of a reflex radio receiver, an inexpensive radio made during the 1920s. The distinguishing feature of the reflex circuit is that the amplifying tube is used twice; the radio signal from the tuner is amplified in the triode vacuum tube V1, rectified in the diode D, then the resulting audio signal is passed through the tube again for audio amplification.
Date
Source Retrieved December 16, 2015 from John Scott-Taggart, "Reflex Radio Receivers in Theory and Practice" in Radio News magazine, Popular Radio Book Co. New York, Vol. 6, No. 4, October 1924, p. 494, fig. 11 on http://www.americanradiohistory.com
Author John Scott-Taggart
Permission
(Reusing this file)		 This 1924 issue of Radio News magazine would have the copyright renewed in 1952. 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 1951, 1952, and 1953 show no renewal entries for Radio News. Therefore the copyright was not renewed and it is in the public domain.

Licensing

Public domain
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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Captions

Circuit of a reflex radio receiver

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depicts

inception

October 1924Gregorian

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Date/TimeThumbnailDimensionsUserComment
current12:55, 19 December 2015Thumbnail for version as of 12:55, 19 December 2015428 × 345 (9 KB)ChetvornoUser created page with UploadWizard

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