GB1015514A - Variable frequency radio transmitters and superheterodyne receivers - Google Patents

Variable frequency radio transmitters and superheterodyne receivers

Info

Publication number
GB1015514A
GB1015514A GB4737062A GB4737062A GB1015514A GB 1015514 A GB1015514 A GB 1015514A GB 4737062 A GB4737062 A GB 4737062A GB 4737062 A GB4737062 A GB 4737062A GB 1015514 A GB1015514 A GB 1015514A
Authority
GB
United Kingdom
Prior art keywords
decades
stage
switchable
network
variable frequency
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
GB4737062A
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
Publication of GB1015514A publication Critical patent/GB1015514A/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
    • H03J5/248—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 electromechanical means

Landscapes

  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)

Abstract

1,015,514. Variable frequency transmitters; radio receiving circuits. L. ROHDE and H. SCHWARZ, [trading as ROHDE & SCHWARZ]. Dec.14, 1962 [Dec. 16, 1961], No. 47370/62. Headings H3Q and H4L. A variable frequency transmitter has a control stage for selecting the output frequency, which is switchable in decades, in series with a tunable power amplifier whose frequency is also switchable in decades, means being provided for the simultaneous switching of corresponding decades in the control and amplifier stages. The invention is also applicable to the simultaneous tuning of the local oscillator and R.F. stage in a superheterodyne receiver. A transmitter comprises a control stage 1 with three decades switches 3,4 and 5 and a power amplifier stage 2 having several amplifier stages 6, 7 and 8 coupled by network 9 and 10. The coupling networks 9, 10 are in the form of tuned oscillator circuits with switchable frequency ranges, arranged so that network 9 has two coarse steps corresponding to the first two decades of stage 1 while network 10 contains three decades identical with stage 1. The settings of these decades are effected simultaneously by dials 14, 15, 16, over controlling lines 11, 12 and 13 respectively. The settings may be effected mechanically or electrically by relays, Fig. 2 (not shown), operated by push buttons at a remote station.
GB4737062A 1961-12-16 1962-12-14 Variable frequency radio transmitters and superheterodyne receivers Expired GB1015514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER31709A DE1194922B (en) 1961-12-16 1961-12-16 Frequency switchable transmitter arrangement

Publications (1)

Publication Number Publication Date
GB1015514A true GB1015514A (en) 1966-01-05

Family

ID=7403643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4737062A Expired GB1015514A (en) 1961-12-16 1962-12-14 Variable frequency radio transmitters and superheterodyne receivers

Country Status (2)

Country Link
DE (1) DE1194922B (en)
GB (1) GB1015514A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186068A (en) * 1938-06-07 1940-01-09 Bendix Radio Corp Radio transmitter
DE1076193B (en) * 1958-01-21 1960-02-25 Siemens Ag Radio transmitter with simple operation
DE1089022B (en) * 1958-02-20 1960-09-15 Siemens Ag Radio transmitter with one-touch operation of the voting organs

Also Published As

Publication number Publication date
DE1194922B (en) 1965-06-16

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