Reflex-receiver-DE293300

Autor/Urheber:

Wilhelm Schloemilch and Otto von Bronk

Shortlink:

https://dewiki.de/b/1a6d8b

Quelle:

Wikimedia Commons

Größe:

1744 x 970 Pixel (25602 Bytes)

Beschreibung:

Circuit of a vacuum tube reflex radio receiver invented by German scientists Wilhelm Schloemilch and Otto von Bronk, from their 1914 patent. The unique feature of the reflex receiver is that the same vacuum tube is used to amplify the radio current and the audio current from The radio signal from the tuned circuit is amplified by the tube and the amplified signal is applied to a crystal detector. The detector extracts the audio (sound) modulation from the radio carrier wave. Then the audio current is applied back into the grid circuit of the tube to be amplified again. The amplified audio is separated from the radio signal by the capacitor and is applied to the earphones. The reflex receiver circuit was used in inexpensive vacuum tube radio receivers during the 1920s and also portable tube radios during the 1930s.

Kommentar zur Lizenz:

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Public domainPublic domainfalsefalse

Dieses Werk gilt gemäß dem deutschen Urheberrecht als gemeinfrei, weil es Teil der Statute, Verordnung oder ein gesetzlicher Erlass (Amtliches Werk) ist, das durch eine deutsche Behörde bzw. durch ein deutsches Gericht veröffentlicht wurde (§ 5 Abs.1 UrhG). dansk ∙ Deutsch ∙ English ∙ español ∙ Esperanto ∙ français ∙ italiano ∙ Malti ∙ Nederlands ∙ polski ∙ sicilianu ∙ suomi ∙ svenska ∙ Tiếng Việt ∙ македонски ∙ русский ∙ українська ∙ বাংলা ∙ 日本語 ∙ 中文（简体） ∙ 中文（繁體） ∙ العربية ∙ +/−

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Lizenz:

Public domain

Credit:

• German Patent DE293300
• Also appears as fig. 4 in US Patent no. 1087892, Wilhelm Schloemilch and Otto von Bronk Means for receiving electrical oscillations, filed March 14, 1913; granted February 17, 1914
• Also appears as fig. 3 in corresponding British patent no. 8821, A Receiving Arrangement in Wireless Telegraphy and Telephony, filed April 15, 1913; granted October 2, 1913.
• Reprinted in Morse, A. H. (1925) Radio: Beam and Broadcast, p. 157, fig. 14

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