GB469380A - Selectivity adjustment arrangement for radio receivers - Google Patents
Selectivity adjustment arrangement for radio receiversInfo
- Publication number
- GB469380A GB469380A GB5938/37A GB593837A GB469380A GB 469380 A GB469380 A GB 469380A GB 5938/37 A GB5938/37 A GB 5938/37A GB 593837 A GB593837 A GB 593837A GB 469380 A GB469380 A GB 469380A
- Authority
- GB
- United Kingdom
- Prior art keywords
- selectivity
- switch
- short
- switches
- waveband
- 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
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
469,380. Wireless receiving circuits. COLE, Ltd., E. K. Feb. 27, 1937, No. 5938. Convention date, July 4, 1936. [Class 40 (v)] The waverange switch and selectivity control of a superheterodyne receive! are so connected that the selectivity is reduced when switching from a higher tc lower wavelength range. The waveband switches 5, 9 of the preselector and oscillator circuits provide for three wavelength ranges and are unicontrolled with a switch 16, which inserts a capacity 15 in the intermediatefrequency filter 10, 11 to reduce the selectivity when the switches 5, 9 are in the short-wave band position. Alternatively an auxiliary coupling coil in series with coil 11 may be put in circuit by the switch 16, Fig. 2 (not shown). The object is to prevent distortion on the short-waveband due to displacement of the carrier frequency with respect to its sidebands.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE469380X | 1936-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB469380A true GB469380A (en) | 1937-07-23 |
Family
ID=20310309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5938/37A Expired GB469380A (en) | 1936-07-04 | 1937-02-27 | Selectivity adjustment arrangement for radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB469380A (en) |
-
1937
- 1937-02-27 GB GB5938/37A patent/GB469380A/en not_active Expired
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