GB736291A - Improvements in and relating to remote control of radio apparatus - Google Patents

Improvements in and relating to remote control of radio apparatus

Info

Publication number
GB736291A
GB736291A GB2255350A GB2255350A GB736291A GB 736291 A GB736291 A GB 736291A GB 2255350 A GB2255350 A GB 2255350A GB 2255350 A GB2255350 A GB 2255350A GB 736291 A GB736291 A GB 736291A
Authority
GB
United Kingdom
Prior art keywords
rectifiers
conducting
circuits
remote control
bias
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
GB2255350A
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.)
TADEUSZ STEFAN HEFTMAN
British Communications Corp Ltd
Original Assignee
TADEUSZ STEFAN HEFTMAN
British Communications Corp 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 TADEUSZ STEFAN HEFTMAN, British Communications Corp Ltd filed Critical TADEUSZ STEFAN HEFTMAN
Priority to GB2255350A priority Critical patent/GB736291A/en
Publication of GB736291A publication Critical patent/GB736291A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/246—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection using electronic means

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Selective Calling Equipment (AREA)

Abstract

736,291. Electronic switching circuits; radio receiving circuits. BRITISH COMMUNICATION CORPORATION, Ltd., and HEFTMAN, T. S. Sept. 13, 1951 [Sept. 13, 1950], No. 22553/50. Classes 40 (5) and 40 (6). Remote control apparatus for selecting tuned circuits in radio apparatus comprises a plurality of rectifiers connected in series with the circuits and a manually-operated switch means to bias the rectifiers to the conducting or the non- conducting state. Fig. 1 shows an intervalve coupling in a radio receiver, in which tuned circuits 13 and 14 are connected through rectifiers 19 and 30 respectively to the circuit connecting the output of valve 10 to the input of valve 36. Remote control switches 22 and 33 associated with bias supplies 26 and 27 enable either of the rectifiers to be made conducting and the other non-conducting, so that either of the tuned circuits may be selected to be operative in the intervalve coupling circuit. Capacitors 20 and 31 are provided to neutralize the capacitances of rectifiers 19 and 30, thereby reducing the coupling when the rectifier is non-conducting. A modification is described in which only one bias source is used in conjunction with a reversing switch. The rectifiers may consist of germanium diodes for low voltages, or thermionic diodes for higher voltages.
GB2255350A 1950-09-13 1950-09-13 Improvements in and relating to remote control of radio apparatus Expired GB736291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2255350A GB736291A (en) 1950-09-13 1950-09-13 Improvements in and relating to remote control of radio apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2255350A GB736291A (en) 1950-09-13 1950-09-13 Improvements in and relating to remote control of radio apparatus

Publications (1)

Publication Number Publication Date
GB736291A true GB736291A (en) 1955-09-07

Family

ID=10181288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2255350A Expired GB736291A (en) 1950-09-13 1950-09-13 Improvements in and relating to remote control of radio apparatus

Country Status (1)

Country Link
GB (1) GB736291A (en)

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