GB520819A - Improvements in superheterodyne radio receivers with pre-set tuning - Google Patents

Improvements in superheterodyne radio receivers with pre-set tuning

Info

Publication number
GB520819A
GB520819A GB15780/39A GB1578039A GB520819A GB 520819 A GB520819 A GB 520819A GB 15780/39 A GB15780/39 A GB 15780/39A GB 1578039 A GB1578039 A GB 1578039A GB 520819 A GB520819 A GB 520819A
Authority
GB
United Kingdom
Prior art keywords
switch
condensers
button
adjusted
condenser
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
GB15780/39A
Other languages
English (en)
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB520819A publication Critical patent/GB520819A/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
    • H03J5/26—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 operated by hand
    • H03J5/32—Stationary tuning circuits or elements selected by push-button

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
GB15780/39A 1938-05-30 1939-05-26 Improvements in superheterodyne radio receivers with pre-set tuning Expired GB520819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE520819X 1938-05-30

Publications (1)

Publication Number Publication Date
GB520819A true GB520819A (en) 1940-05-03

Family

ID=6551168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15780/39A Expired GB520819A (en) 1938-05-30 1939-05-26 Improvements in superheterodyne radio receivers with pre-set tuning

Country Status (3)

Country Link
BE (1) BE434610A (enrdf_load_stackoverflow)
FR (1) FR855443A (enrdf_load_stackoverflow)
GB (1) GB520819A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR855443A (fr) 1940-05-10
BE434610A (enrdf_load_stackoverflow)

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