GB441627A - Improvements in intermediate frequency transformers for superheterodyne radio receivers - Google Patents

Improvements in intermediate frequency transformers for superheterodyne radio receivers

Info

Publication number
GB441627A
GB441627A GB2148534A GB2148534A GB441627A GB 441627 A GB441627 A GB 441627A GB 2148534 A GB2148534 A GB 2148534A GB 2148534 A GB2148534 A GB 2148534A GB 441627 A GB441627 A GB 441627A
Authority
GB
United Kingdom
Prior art keywords
intermediate frequency
frequency transformers
transformers
radio receivers
wireless receivers
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
GB2148534A
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
Priority to GB2148534A priority Critical patent/GB441627A/en
Publication of GB441627A publication Critical patent/GB441627A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • H03H7/0176—Intermediate frequency filters witout magnetic core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C7/00—Non-inflatable or solid tyres
    • B60C7/04—Non-inflatable or solid tyres made of wood or leather

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

441,627. Intermediate frequency transformers for superheterodyne wireless receivers. STANDARD TELEPHONES & CABLES, Ltd., and EARP, C. W., 63, Aldwych, London. July 23, 1934, No. 21485. [Class 38 (ii)] [See also Groups XXXVI and XL] Intermediate frequency transformers for superheterodyne wireless receivers are provided with means for adjusting the relative positions of the windings which means are adapted to extend outside the receiver whereby the latter may be adjusted as regards selectivity during operation. The arrangement shown comprises a pair of such transformers having fixed secondaries 1 and slidably mounted primaries 6 adapted to be moved in opposition to springs 10 by cams 13 on a common operating spindle 11 carried by a bracket 12 and extending through the side of the chassis. Stop means 20 are provided to limit rotation of the spindle to 180‹.
GB2148534A 1934-07-23 1934-07-23 Improvements in intermediate frequency transformers for superheterodyne radio receivers Expired GB441627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2148534A GB441627A (en) 1934-07-23 1934-07-23 Improvements in intermediate frequency transformers for superheterodyne radio receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2148534A GB441627A (en) 1934-07-23 1934-07-23 Improvements in intermediate frequency transformers for superheterodyne radio receivers

Publications (1)

Publication Number Publication Date
GB441627A true GB441627A (en) 1936-01-23

Family

ID=10163729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2148534A Expired GB441627A (en) 1934-07-23 1934-07-23 Improvements in intermediate frequency transformers for superheterodyne radio receivers

Country Status (1)

Country Link
GB (1) GB441627A (en)

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