GB528061A - Improvements in or relating to radio direction finding apparatus - Google Patents

Improvements in or relating to radio direction finding apparatus

Info

Publication number
GB528061A
GB528061A GB1206439A GB1206439A GB528061A GB 528061 A GB528061 A GB 528061A GB 1206439 A GB1206439 A GB 1206439A GB 1206439 A GB1206439 A GB 1206439A GB 528061 A GB528061 A GB 528061A
Authority
GB
United Kingdom
Prior art keywords
amplifiers
gain
pilot
valves
anodes
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
GB1206439A
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.)
PLESSY Co Ltd
Original Assignee
PLESSY Co Ltd
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 PLESSY Co Ltd filed Critical PLESSY Co Ltd
Priority to GB1206439A priority Critical patent/GB528061A/en
Publication of GB528061A publication Critical patent/GB528061A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/023—Monitoring or calibrating

Abstract

528,061. Directive wireless signalling. WILLANS, P. W., and PLESSEY CO., Ltd. April 21, 1939, No. 12064. [Class 40 (v)] Automatic gain control is applied through a pilot current to the amplifiers used in a directionfinding system for feeding a direct-reading indicator, such as a cathode ray tube. The signal voltages are applied to the two amplifiers 10, 11, together with a "pilot" frequency indicated at 14, and the output is passed through coils 16 to a directional indicator (not shown). The pilot frequency is also applied through a transformer 22 to the anodes of two gain-control valves 19, 20. Any variation in the gain of the amplifiers 10, 11 will produce an unbalanced voltage in a coil 18 which is coupled to the grids of the valves 19, 20. This, in combination with the pilot frequency on the anodes of those valves, produces a biasing voltage across the anode resistance 21. The latter is connected through leads 24, 25 respectively to the grids of the main amplifiers 10, 11 and serves to equalize the gain of both. Specification 385,982, (Group XXXVI), is referred to.
GB1206439A 1939-04-21 1939-04-21 Improvements in or relating to radio direction finding apparatus Expired GB528061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1206439A GB528061A (en) 1939-04-21 1939-04-21 Improvements in or relating to radio direction finding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1206439A GB528061A (en) 1939-04-21 1939-04-21 Improvements in or relating to radio direction finding apparatus

Publications (1)

Publication Number Publication Date
GB528061A true GB528061A (en) 1940-10-22

Family

ID=9997763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1206439A Expired GB528061A (en) 1939-04-21 1939-04-21 Improvements in or relating to radio direction finding apparatus

Country Status (1)

Country Link
GB (1) GB528061A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477028A (en) * 1945-02-03 1949-07-26 Wilkie Harry Dual channel gain control
US2505266A (en) * 1944-05-12 1950-04-25 Radio Electr Soc Fr Radioelectric communication device
US2533599A (en) * 1947-03-21 1950-12-12 Fr Sadir Carpentier Soc Radio receiving system
US2691103A (en) * 1947-08-25 1954-10-05 Hartford Nat Bank & Trust Co Circuit-arrangement for controlling the amplitude and the frequency of an electricaloscillation
US2943317A (en) * 1955-04-27 1960-06-28 Robert A Zachary Automatic gain control for monopulse radar
US2974224A (en) * 1956-08-28 1961-03-07 Gilfillan Bros Inc Apparatus for automatic gain control
US2977465A (en) * 1956-12-24 1961-03-28 Raytheon Co Frequency-scanning radio receivers
US2977588A (en) * 1949-03-31 1961-03-28 Rca Corp Radar systems with gain equalization circuits
US2983814A (en) * 1956-02-01 1961-05-09 Raytheon Co Signal receivers
US3009151A (en) * 1959-09-28 1961-11-14 Rca Corp Stereophonic radio balance and tuning indicator system
US3018369A (en) * 1958-03-12 1962-01-23 Rca Corp Transistorized direction finder receiver having a local audio signal modulated on the mixer
US3117186A (en) * 1960-02-17 1964-01-07 Richard W Burden Compatible stereophonic broadcast system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505266A (en) * 1944-05-12 1950-04-25 Radio Electr Soc Fr Radioelectric communication device
US2477028A (en) * 1945-02-03 1949-07-26 Wilkie Harry Dual channel gain control
US2533599A (en) * 1947-03-21 1950-12-12 Fr Sadir Carpentier Soc Radio receiving system
US2691103A (en) * 1947-08-25 1954-10-05 Hartford Nat Bank & Trust Co Circuit-arrangement for controlling the amplitude and the frequency of an electricaloscillation
US2977588A (en) * 1949-03-31 1961-03-28 Rca Corp Radar systems with gain equalization circuits
US2943317A (en) * 1955-04-27 1960-06-28 Robert A Zachary Automatic gain control for monopulse radar
US2983814A (en) * 1956-02-01 1961-05-09 Raytheon Co Signal receivers
US2974224A (en) * 1956-08-28 1961-03-07 Gilfillan Bros Inc Apparatus for automatic gain control
US2977465A (en) * 1956-12-24 1961-03-28 Raytheon Co Frequency-scanning radio receivers
US3018369A (en) * 1958-03-12 1962-01-23 Rca Corp Transistorized direction finder receiver having a local audio signal modulated on the mixer
US3009151A (en) * 1959-09-28 1961-11-14 Rca Corp Stereophonic radio balance and tuning indicator system
US3117186A (en) * 1960-02-17 1964-01-07 Richard W Burden Compatible stereophonic broadcast system

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