GB540897A - Improvements in or relating to radio receivers provided with two output circuits from the same output valve - Google Patents
Improvements in or relating to radio receivers provided with two output circuits from the same output valveInfo
- Publication number
- GB540897A GB540897A GB797440A GB797440A GB540897A GB 540897 A GB540897 A GB 540897A GB 797440 A GB797440 A GB 797440A GB 797440 A GB797440 A GB 797440A GB 540897 A GB540897 A GB 540897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- output
- listeners
- transformers
- radio receivers
- 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
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
540,897. Receiving circuits. STANDARD TELEPHONES & CABLES, Ltd., EARP, C. W., and HOLLAND, J. D. May 3, 1940, No. 7974. [Class 40 (iv)] [Also in Group XL] In an arrangement particularly for use on aircraft for supplying signals from two radio receivers W1, W2 to two listeners A, B, each output valve V1, V2 has a pair of output transformers T1, T2 ; T5, T6 whose primary windings are connected in series in the anode circuit and whose secondary windings are connected to the respective headphones Ha, Hb. The receiver W1 may be for communication and W2 for direction finding, and in order that the listeners may when desired only hear the signals with which they are directly concerned the connections from the transformers T1, T5 include potentiometers R1, R2 for reducing the level of the signals. In addition the output from the receivers W1, W2 is adjustable by means of potentiometers R3, R4. In order to prevent leakage of the undesired signals to either listener by transmission through both T1, T2 or T5, T6, high impedance valves for example pentodes are employed. To allow telephone communication between the listeners, their microphones Ma, Mb are connected to transformers T3, T4 having their secondaries in the cathode circuit of the valves V1, V2. One microphone Ma is also connected through a transformer T7 to a radio transmitter.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR958704D FR958704A (en) | 1940-05-03 | ||
GB797440A GB540897A (en) | 1940-05-03 | 1940-05-03 | Improvements in or relating to radio receivers provided with two output circuits from the same output valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB797440A GB540897A (en) | 1940-05-03 | 1940-05-03 | Improvements in or relating to radio receivers provided with two output circuits from the same output valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB540897A true GB540897A (en) | 1941-11-04 |
Family
ID=9843343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB797440A Expired GB540897A (en) | 1940-05-03 | 1940-05-03 | Improvements in or relating to radio receivers provided with two output circuits from the same output valve |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR958704A (en) |
GB (1) | GB540897A (en) |
-
0
- FR FR958704D patent/FR958704A/fr not_active Expired
-
1940
- 1940-05-03 GB GB797440A patent/GB540897A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR958704A (en) | 1950-03-17 |
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