GB418117A - Improvements in or relating to apparatus for radio reception and gramophone reproduction - Google Patents

Improvements in or relating to apparatus for radio reception and gramophone reproduction

Info

Publication number
GB418117A
GB418117A GB12830/34A GB1283034A GB418117A GB 418117 A GB418117 A GB 418117A GB 12830/34 A GB12830/34 A GB 12830/34A GB 1283034 A GB1283034 A GB 1283034A GB 418117 A GB418117 A GB 418117A
Authority
GB
United Kingdom
Prior art keywords
gramophone
reproduction
receiver
switch
relating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12830/34A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB418117A publication Critical patent/GB418117A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

418,117. Wireless receiving-apparatus. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. April 27, 1934, No. 12830. Convention date, May 11, 1933. [Class 40 (v).] Energy feed-back for the local oscillator of a 'super-heterodyne receiver is prevented when the receiver is switched for gramophone reproduction. The switch 3, connecting a gramophone pick-up G to the low-frequency amplifier is ganged with a switch E which short circuits the inductance L in the feed-back circuit of the combined detector oscillator M. Preferably wave band switches K1, K2 are also operated so that one is set for long wave, and the other for short wave reception, so completely detuning the receiver during gramophone reproduction.
GB12830/34A 1933-05-11 1934-04-27 Improvements in or relating to apparatus for radio reception and gramophone reproduction Expired GB418117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE418117X 1933-05-11

Publications (1)

Publication Number Publication Date
GB418117A true GB418117A (en) 1934-10-18

Family

ID=6448804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12830/34A Expired GB418117A (en) 1933-05-11 1934-04-27 Improvements in or relating to apparatus for radio reception and gramophone reproduction

Country Status (3)

Country Link
BE (1) BE402676A (en)
FR (1) FR772890A (en)
GB (1) GB418117A (en)

Also Published As

Publication number Publication date
BE402676A (en)
FR772890A (en) 1934-11-07

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