GB531612A - Radio apparatus or the like - Google Patents

Radio apparatus or the like

Info

Publication number
GB531612A
GB531612A GB15467/39A GB1546739A GB531612A GB 531612 A GB531612 A GB 531612A GB 15467/39 A GB15467/39 A GB 15467/39A GB 1546739 A GB1546739 A GB 1546739A GB 531612 A GB531612 A GB 531612A
Authority
GB
United Kingdom
Prior art keywords
magnet
tuned
valve
tuning
group
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
GB15467/39A
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 GB531612A publication Critical patent/GB531612A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1607—Supply circuits
    • H04B1/1623—Supply circuits using tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/08—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by varying the permeability of the core, e.g. by varying magnetic bias
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
    • H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Amplifiers (AREA)

Abstract

531,612. Wireless receiving circuits. KRAMOLIN, L. L. DE. May 24, 1939, No. 15467. Convention date, May 25, 1938. [Class 40 (v)] A single-span superheterodyne receiver, which is tuned by the cores of coils S1, S2 being partly saturated by a magnet M, has the D.C. supply for the magnet M, the oscillator O and tuning indicator valve A, effectively decoupled from that supplying the rest of the receiver. Preferably separate power units NG1, NG2 are used, but a single power unit with each load connected to half a two-way rectifier can be used. The aerial is coupled to the first valve through a tuned coupling S1 so as to reduce the noise to signal ratio. This coupling has a double hump characteristic as described in Specification 530,615. The intermediate frequency amplifier ZF comprises double valves, Fig. 2 (not shown) in which as regards carrier currents the anode of the first part is connected to the cathode of the second part, and tuned couplings in the cathode leads to give negative feed-back. The automatic volume control acts upon the grids of all but the first valve of the intermediate amplifier. Tuning is effected by varying the current in coil M from a remote controller, as described in Specification 530,616, [Group XXXVI]. Automatic tuning correction is derived from the device AA and is applied to an auxiliary winding on the magnet M. Specifications 449,240, 451,097, [Group XXXVI], 451,098, 455,190, 470,945, 473,384, 481,062, 490,058, 510,862, 510,941, 511,031, [Group XXXV], 513,626 and 517,966, [Group XXXVI], also are referred to.
GB15467/39A 1938-05-25 1939-05-24 Radio apparatus or the like Expired GB531612A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE530615X 1938-05-25

Publications (1)

Publication Number Publication Date
GB531612A true GB531612A (en) 1941-01-08

Family

ID=6554592

Family Applications (2)

Application Number Title Priority Date Filing Date
GB15608/40A Expired GB530615A (en) 1938-05-25 1939-05-24 Improvements in or relating to carrier wave receivers
GB15467/39A Expired GB531612A (en) 1938-05-25 1939-05-24 Radio apparatus or the like

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB15608/40A Expired GB530615A (en) 1938-05-25 1939-05-24 Improvements in or relating to carrier wave receivers

Country Status (1)

Country Link
GB (2) GB530615A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989688A (en) * 1957-06-05 1961-06-20 Gen Motors Corp Saturation permeability tuned transistor radio
DE1616703B1 (en) * 1961-04-29 1969-09-04 Blaupunkt Werke Gmbh Radio receiver with transistors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989688A (en) * 1957-06-05 1961-06-20 Gen Motors Corp Saturation permeability tuned transistor radio
DE1616703B1 (en) * 1961-04-29 1969-09-04 Blaupunkt Werke Gmbh Radio receiver with transistors

Also Published As

Publication number Publication date
GB530615A (en) 1940-12-16

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