Blattnerphone recorder 1937

Forfatter/Opretter:

Douglas Hallam, Jr.

Kredit:

Retrieved April 11, 2014 from Douglas Hallam, Jr., "The BBC Program Transmission System", in Communication and Broadcast Engineering magazine, Bryan Davis Publishing Co., New York, Vol. 4, No. 2, February 1937, p. 13 on American Radio History website

Shortlink:

https://dkwiki.dk/b/19005

kilde:

Wikimedia Commons

størrelse:

945 x 705 Pixel (113842 Bytes)

beskrivelse:

Blattnerphone steel tape recorder, an early magnetic recording technology, developed by Dr. Kurt Stille and Louis Blattner in 1924, at BBC studios, used to record programs for rebroadcast in Empire countries. The recording tape was 3mm wide and 0.08 mm thick, and traveled at 1.5 meters / second. It was limited to voice programs as it did not have the fidelity to record music.

Caption: "One of the Blattnerphone BBC recording machines on which the programs are recorded by a magnetic process for Empire broadcasting"

Licens:

Public domain

Kommentar på licensen:

This 1937 issue of Communication and Broadcast Engineering magazine would have the copyright renewed in 1955. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [1] Search of the Renewals for Periodicals for 1954, 1955 and 1956 show no renewal entries for Communication and Broadcast Engineering. Therefore the magazine's copyright was not renewed and it is in the public domain.