GB357647A - Improvements in or relating to wave signalling systems - Google Patents

Improvements in or relating to wave signalling systems

Info

Publication number
GB357647A
GB357647A GB1972730A GB1972730A GB357647A GB 357647 A GB357647 A GB 357647A GB 1972730 A GB1972730 A GB 1972730A GB 1972730 A GB1972730 A GB 1972730A GB 357647 A GB357647 A GB 357647A
Authority
GB
United Kingdom
Prior art keywords
frequency
amplifier
selectivity
intermediate frequency
valve
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
GB1972730A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1972730A priority Critical patent/GB357647A/en
Publication of GB357647A publication Critical patent/GB357647A/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)
  • Amplifiers (AREA)

Abstract

357,647. Valve amplifying and detecting circuits. ROBINSON, J., 29, George Street, Hanover Square, London. June 28, 1930, No. 19727. [Class 40 (v).] In a supersonic heterodyne receiver the intermediate frequency used is so low that the high order of selectivity set forth in Specification 344,869 is obtained and means are provided to correct for the distortion due to the high selectivity. The Figure shows a receiver comprising a high frequency amplifying valve V, detector valves V2, V5, and couplings L5 C8, L7CII, L9 C13 for the intermediate frequency amplifier arranged to give the required selectivity. Correction is effected in the input circuit of low frequency amplifying valve V6, by resistance condenser combination R6 R7 C17. The intermediate frequency is preferably of the order of 20000 cycles and numerical data for the components used for an amplifier at this frequency are given in the Specification. The correction may be effected in steps throughout the amplifier and by modifying the transformer T.
GB1972730A 1930-06-28 1930-06-28 Improvements in or relating to wave signalling systems Expired GB357647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1972730A GB357647A (en) 1930-06-28 1930-06-28 Improvements in or relating to wave signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1972730A GB357647A (en) 1930-06-28 1930-06-28 Improvements in or relating to wave signalling systems

Publications (1)

Publication Number Publication Date
GB357647A true GB357647A (en) 1931-09-28

Family

ID=10134195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1972730A Expired GB357647A (en) 1930-06-28 1930-06-28 Improvements in or relating to wave signalling systems

Country Status (1)

Country Link
GB (1) GB357647A (en)

Similar Documents

Publication Publication Date Title
GB357647A (en) Improvements in or relating to wave signalling systems
GB419914A (en) Improvements relating to thermionic amplifiers
GB533894A (en) Improvements in modulated-carrier signal-translating systems
GB449224A (en) Improvements in or relating to television receivers
GB485990A (en) Improvements in or relating to amplifiers
GB318328A (en) Improved means of wireless reception
GB202700A (en) Improvements relating to wireless and wired wireless telegraphy and telephony
GB315663A (en) Means for obtaining selective reception of radio and like signals
GB387683A (en) Improvements in band-pass tuning circuits for wireless signalling
GB435135A (en) Improvements in and relating to interference eliminator for wireless receivers
GB375410A (en) Improvements in or relating to receiving apparatus for electric wave signals
SE100648C1 (en)
GB279202A (en) Improvements relating to thermionic valve amplifier circuits
GB461089A (en) Improvements in coupling networks for high frequency circuits
GB388732A (en) Improvements in radio frequency receivers
GB448005A (en) Superheterodyne receiver for wireless reception
GB345822A (en) Improvements in or relating to high frequency amplifiers
GB437643A (en) Improvements in detectors for television signals
GB294300A (en) Improvements in or relating to frame aerials for use in radio receiving apparatus
GB356726A (en) Improvements relating to radio receiving apparatus
GB254353A (en) Selective devices for radiotelegraphic reception and like purposes
GB324704A (en) Improvements in and relating to wireless receiving systems and apparatus
GB378519A (en) Improvements in radio apparatus and method of operating the same
GB500273A (en) System of radio-telegraphic reception for long and medium waves with very sharp selevtivity
GB410225A (en) Improvements in and relating to wireless receiving apparatus