GB474932A - Improvements relating to radio receivers - Google Patents

Improvements relating to radio receivers

Info

Publication number
GB474932A
GB474932A GB1911536A GB1911536A GB474932A GB 474932 A GB474932 A GB 474932A GB 1911536 A GB1911536 A GB 1911536A GB 1911536 A GB1911536 A GB 1911536A GB 474932 A GB474932 A GB 474932A
Authority
GB
United Kingdom
Prior art keywords
indicator
amplifier
triode
gramophone
switches
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
GB1911536A
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.)
ARTHUR EVEREST FALKUS
EK Cole Ltd
Original Assignee
ARTHUR EVEREST FALKUS
EK Cole 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 ARTHUR EVEREST FALKUS, EK Cole Ltd filed Critical ARTHUR EVEREST FALKUS
Priority to GB1911536A priority Critical patent/GB474932A/en
Publication of GB474932A publication Critical patent/GB474932A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye

Landscapes

  • Amplifiers (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

474,932. Wireless receiving circuits. COLE, Ltd., E. K., and FALKUS, A. E. July 10, 1936, No. 19115. [Class 40 (v)] In a radio receiver having a cathode-ray tuning indicator and an amplifier valve which is used solely to operate the indicator when radio signals are being received, switching means are provided on gramophone reproduction to cause the amplifier to operate also as a signal amplifier. For wireless reception, the switches 1, 2, 3 are in their right-hand positions ; the junction of the signal diode load resistances R11, R12 is then connected over the volume control potentiometer VR1 to the grid of V3 and also over resistances R17, R15 to the grid of the triode portion of a combined amplifier and cathode-ray indicator V6, the triode anode being connected to the indicator deflecting plates, so that maximum signal causes minimum grid potential and maximum anode potential of triode V6, thereby causing maximum illumination of the indicator screen. On gramophone reproduction, switches 1, 2, 3 are over to the left, the pickup terminals G are connected to the input of triode V6, the bias of which is altered by switch 3 so that it functions as a low-frequency amplifier, while the indicator is raised to maximum illumination to show that the set is on " gramophone." A further switch may be conjointly operated with switches 1, 2, 3 to bias prohibitively the valves controlled from the A.V.C. network R9, R10 on gramophone reproduction.
GB1911536A 1936-07-10 1936-07-10 Improvements relating to radio receivers Expired GB474932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1911536A GB474932A (en) 1936-07-10 1936-07-10 Improvements relating to radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1911536A GB474932A (en) 1936-07-10 1936-07-10 Improvements relating to radio receivers

Publications (1)

Publication Number Publication Date
GB474932A true GB474932A (en) 1937-11-10

Family

ID=10124009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1911536A Expired GB474932A (en) 1936-07-10 1936-07-10 Improvements relating to radio receivers

Country Status (1)

Country Link
GB (1) GB474932A (en)

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