GB804874A - Improvements in multi-band radio receivers - Google Patents

Improvements in multi-band radio receivers

Info

Publication number
GB804874A
GB804874A GB11188/57A GB1118857A GB804874A GB 804874 A GB804874 A GB 804874A GB 11188/57 A GB11188/57 A GB 11188/57A GB 1118857 A GB1118857 A GB 1118857A GB 804874 A GB804874 A GB 804874A
Authority
GB
United Kingdom
Prior art keywords
condensers
fixed
parallel
coil
padding
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
GB11188/57A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB804874A publication Critical patent/GB804874A/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
    • H03J3/10—Circuit arrangements for fine tuning, e.g. bandspreading

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

804,874. Radio receiving circuits. STANDARD TELEPHONES & CABLES Ltd. April 5, 1957 [April 6, 1956], No. 11188/57. Class 40 (5). In a multi-band radio receiver each section, e.g. 16, of the ganged tuning condenser 16, 16<1> is switched, in a first switch position 1 in parallel with a corresponding medium-wave coil, 12; in a second position 2 parallel with a shortwave coil 13, and fixed padding condenser 17; and in further switch positions 3, 4 in parallel with the same short-wave coil but with interposition of fixed series padding condensers 19, 21 respectively, fixed parallel padding condensers 19, 21 respectively also being connected across the coil. Trimming condensers, e.g. 22, are provided for each tuning range. In a superheterodyne receiver fixed padding condensers 26, 27 are also connected in series with the corresponding medium and short-wave oscillator coils 28, 29 respectively and the values of the fixed series condensers 32, 33 associated with the oscillator switching circuits are chosen to provide correct tracking on the bands concerned.
GB11188/57A 1956-04-06 1957-04-05 Improvements in multi-band radio receivers Expired GB804874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU804874X 1956-04-06

Publications (1)

Publication Number Publication Date
GB804874A true GB804874A (en) 1958-11-26

Family

ID=3759644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11188/57A Expired GB804874A (en) 1956-04-06 1957-04-05 Improvements in multi-band radio receivers

Country Status (1)

Country Link
GB (1) GB804874A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118388A (en) * 1982-04-10 1983-10-26 Licentia Gmbh Four-terminal network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118388A (en) * 1982-04-10 1983-10-26 Licentia Gmbh Four-terminal network

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