GB501446A - Improvements in or relating to radio receivers - Google Patents
Improvements in or relating to radio receiversInfo
- Publication number
- GB501446A GB501446A GB20670/37A GB2067037A GB501446A GB 501446 A GB501446 A GB 501446A GB 20670/37 A GB20670/37 A GB 20670/37A GB 2067037 A GB2067037 A GB 2067037A GB 501446 A GB501446 A GB 501446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- condenser
- july
- automatic
- control lead
- 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
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G5/00—Tone control or bandwidth control in amplifiers
- H03G5/16—Automatic control
- H03G5/18—Automatic control in untuned amplifiers
- H03G5/20—Automatic control in untuned amplifiers having discharge tubes
Landscapes
- Noise Elimination (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
501,446. Valve amplifying and filter circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. July 26, 1937, No. 20670. Convention date, July 25, 1936. [Classes 40 (iii) and 40 (v)] A low-pass filter for providing automatic tone-control in a wireless receiver comprises inductance L (which may be the leakage inductance of the coupling transformer) and a thermionic capacity comprising an adjustable condenser 31 and variable-mu valve. The control voltage is derived from the automatic volume control or automatic selectivity control lead and the higher its value the higher the frequency of the cut-off point. Adjustment of the condenser controls the shape of the characteristic and may be used to give a strong peak near the cutoff point to compensate for the effect of high selectivity. In the arrangement shown in Fig. 3 the condenser and the control lead are connected to different grids of a heptode and the voltage of the control lead is controllable manually by a slider 77 as well as automatically. Possible values of the circuit components are given on the Specification. French Specification 768,306 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US501446XA | 1936-07-25 | 1936-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB501446A true GB501446A (en) | 1939-02-27 |
Family
ID=21963590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20670/37A Expired GB501446A (en) | 1936-07-25 | 1937-07-26 | Improvements in or relating to radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB501446A (en) |
-
1937
- 1937-07-26 GB GB20670/37A patent/GB501446A/en not_active Expired
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