GB914435A - Improvements in or relating to radio transmitters - Google Patents

Improvements in or relating to radio transmitters

Info

Publication number
GB914435A
GB914435A GB41757/60A GB4175760A GB914435A GB 914435 A GB914435 A GB 914435A GB 41757/60 A GB41757/60 A GB 41757/60A GB 4175760 A GB4175760 A GB 4175760A GB 914435 A GB914435 A GB 914435A
Authority
GB
United Kingdom
Prior art keywords
winding
valve
current
voltage
proportional
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
GB41757/60A
Inventor
Louis John Heaton-Armstrong
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
Priority to FR1114820D priority Critical patent/FR1114820A/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB41757/60A priority patent/GB914435A/en
Priority to DE19611416137 priority patent/DE1416137B2/en
Priority to US156784A priority patent/US3182260A/en
Priority to FR881007A priority patent/FR81112E/en
Publication of GB914435A publication Critical patent/GB914435A/en
Priority to DE19661491955 priority patent/DE1491955A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/548—Protection of anode or grid circuit against overload
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/30—Automatic scanning over a band of frequencies where the scanning is accomplished by mechanical means, e.g. by a motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Static Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

914,435. Valve supply circuits. STANDARD TELEPHONES & CABLES Ltd. Dec. 5, 1960, No. 41757/60. Class 40 (6). In a radio transmitter a relay 2 disconnects power from the valves in the event of excessive anode dissipation in the final valve 1, being operative upon the difference between the cathode current of this valve and a current proportional to its power output. The final valve 1 feeds coaxial cable 5 via tuned circuit 3 and variable inductor 4, and the connecting conductor passes through a toroidal core 7 on which is a secondary winding 8. This winding produces a voltage proportional to transmitter output current to which is added a voltage proportional to transmitter output voltage, by means of tuned circuit 12, 13, coupled to the cable by capacitor 17 and which feeds into the centre-tap on resistor 9. The combined voltage is fed to a full-wave rectifier comprising diodes 10, 11, provided with a delay bias from source 14. A current proportional to the transmitter output power is derived from the full-wave rectifier and is fed to one winding of relay 2, the second winding of which is in the cathode circuit of the valve 1, being connected in opposition to the first winding. Specification 914,434 is referred to.
GB41757/60A 1960-12-05 1960-12-05 Improvements in or relating to radio transmitters Expired GB914435A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR1114820D FR1114820A (en) 1960-12-05 1954-02-26 Automatic tuning device
GB41757/60A GB914435A (en) 1960-12-05 1960-12-05 Improvements in or relating to radio transmitters
DE19611416137 DE1416137B2 (en) 1960-12-05 1961-12-01 Overload protection device for transmitters
US156784A US3182260A (en) 1960-12-05 1961-12-04 Radio transmitter overload protection system
FR881007A FR81112E (en) 1960-12-05 1961-12-05 Automatic tuning device
DE19661491955 DE1491955A1 (en) 1960-12-05 1966-03-24 Overload protection device for high frequency transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41757/60A GB914435A (en) 1960-12-05 1960-12-05 Improvements in or relating to radio transmitters

Publications (1)

Publication Number Publication Date
GB914435A true GB914435A (en) 1963-01-02

Family

ID=10421243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41757/60A Expired GB914435A (en) 1960-12-05 1960-12-05 Improvements in or relating to radio transmitters

Country Status (3)

Country Link
US (1) US3182260A (en)
FR (2) FR1114820A (en)
GB (1) GB914435A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268825A (en) * 1963-07-12 1966-08-23 Collins Radio Co Anode dissipation limiter
US3345570A (en) * 1965-05-26 1967-10-03 Rca Corp Transistor protection circuit for radio transmitter
US4370694A (en) * 1980-10-03 1983-01-25 Rockwell International Corporation Electrical interlock

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509703A (en) * 1945-11-29 1950-05-30 Us Navy Protecting circuit
US2504699A (en) * 1946-04-27 1950-04-18 Gen Electric Tube protective circuit
CH270968A (en) * 1947-02-21 1950-09-30 Marconi Wireless Telegraph Co Overload protection circuit of a modulated carrier transmitter.
DE940239C (en) * 1952-04-13 1956-03-15 Hagenuk Neufeldt Kuhnke Gmbh Circuit arrangement for the automatic limitation of the anode power loss of externally controlled transmitter output stages

Also Published As

Publication number Publication date
US3182260A (en) 1965-05-04
FR1114820A (en) 1956-04-17
FR81112E (en) 1963-08-02

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