GB289012A - Improvements in or relating to radio and the like receivers - Google Patents

Improvements in or relating to radio and the like receivers

Info

Publication number
GB289012A
GB289012A GB11489/28A GB1148928A GB289012A GB 289012 A GB289012 A GB 289012A GB 11489/28 A GB11489/28 A GB 11489/28A GB 1148928 A GB1148928 A GB 1148928A GB 289012 A GB289012 A GB 289012A
Authority
GB
United Kingdom
Prior art keywords
wireless
wired
frequency amplifier
kilocycles
programmes
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
GB11489/28A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB289012A publication Critical patent/GB289012A/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
    • H04B1/26—Circuits for superheterodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

289,012. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Weinberger, J.). April 19, 1927, [Convention date]. Thermionic heterodyne receivers; wired-wireless systems.-A superheterodyne set is arranged so as to receive at will either wireless programmes radiated within the normal broadcast range of frequencies between 500 and 1500 kilocycles, or programmes distributed by wired-wireless at frequencies between 50 and 150 kilocycles. The aerial 1 is permanently coupled to a radio-frequency amplifier 3, a local oscillator 5, and a first detector 4. A separate apparatus 6 comprises an intermediate-frequency amplifier operating at the wired-wireless carrier frequency, a second detector, and a low frequency amplifier feeding a loudspeaker 7. A switch 8 enables the unit 6 to be connected either to the output from the unit 4, or to the terminals 9, 10 of the wiredwireless line, and may also complete the filament and plate circuits of the operative valves.
GB11489/28A 1927-04-19 1928-04-18 Improvements in or relating to radio and the like receivers Expired GB289012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US184881A US1725946A (en) 1927-04-19 1927-04-19 Broadcast receiving system

Publications (1)

Publication Number Publication Date
GB289012A true GB289012A (en) 1928-07-05

Family

ID=22678739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11489/28A Expired GB289012A (en) 1927-04-19 1928-04-18 Improvements in or relating to radio and the like receivers

Country Status (2)

Country Link
US (1) US1725946A (en)
GB (1) GB289012A (en)

Also Published As

Publication number Publication date
US1725946A (en) 1929-08-27

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