GB581296A - Improvements in and relating to aerial tuning systems for radio transmitters - Google Patents

Improvements in and relating to aerial tuning systems for radio transmitters

Info

Publication number
GB581296A
GB581296A GB1639244A GB1639244A GB581296A GB 581296 A GB581296 A GB 581296A GB 1639244 A GB1639244 A GB 1639244A GB 1639244 A GB1639244 A GB 1639244A GB 581296 A GB581296 A GB 581296A
Authority
GB
United Kingdom
Prior art keywords
aerial
switch
tuning
tapped
coupling
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
GB1639244A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1639244A priority Critical patent/GB581296A/en
Publication of GB581296A publication Critical patent/GB581296A/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
    • H03J5/242—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 used exclusively for band selection

Landscapes

  • Transmitters (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

581,296. Aerial coupling arrangements. TENENBAUM, B. Aug. 29, 1944, No. 16392. [Class 40 (v)] A tuning arrangement for aerial circuits for transmission on two or more wave ranges has the fine tuning on some ranges controlled by a variable inductance and on the others by a variable condenser. These variable impedances are adjustable by the same knob, only one of them being inserted in the aerial circuit at a time. A tapped inductance or tapped inductance and tapped condenser may be used for the rough tuning of the circuits and the contact arms of the switches bringing about this tuning may be mounted on the same spindle as contact arms which switch in various tappings on the coils for adjustment of the coupling between the aerial circuits and the output stages of the transmitter. The condenser a and movable coil h which are the fine tuning means of aerial circuits A, B respectively, are connected to a common spindle indicated by C. In circuit A the coupling between the output stage and the aerial circuit, effected by coils band b<1>, is varied by rotation of movable arm d of switch c. In circuit B the coupling is varied by means of switch l which is connected to fixed tapped coil g, and rough tuning is obtained by means of switch i connected to fixed tapped coil f. Movable arms d, j, m are connected on a common spindle. The aerial is connected either to switch arm d or j according as trans-. mission is to be effected on short or on medium waves.
GB1639244A 1944-08-29 1944-08-29 Improvements in and relating to aerial tuning systems for radio transmitters Expired GB581296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1639244A GB581296A (en) 1944-08-29 1944-08-29 Improvements in and relating to aerial tuning systems for radio transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1639244A GB581296A (en) 1944-08-29 1944-08-29 Improvements in and relating to aerial tuning systems for radio transmitters

Publications (1)

Publication Number Publication Date
GB581296A true GB581296A (en) 1946-10-08

Family

ID=10076498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1639244A Expired GB581296A (en) 1944-08-29 1944-08-29 Improvements in and relating to aerial tuning systems for radio transmitters

Country Status (1)

Country Link
GB (1) GB581296A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402265A (en) * 2003-04-28 2004-12-01 Itt Mfg Enterprises Inc Tuneable antenna

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2402265A (en) * 2003-04-28 2004-12-01 Itt Mfg Enterprises Inc Tuneable antenna

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