GB392158A - Improvements in or relating to radio receivers - Google Patents
Improvements in or relating to radio receiversInfo
- Publication number
- GB392158A GB392158A GB3107731A GB3107731A GB392158A GB 392158 A GB392158 A GB 392158A GB 3107731 A GB3107731 A GB 3107731A GB 3107731 A GB3107731 A GB 3107731A GB 392158 A GB392158 A GB 392158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- inductance
- circuit
- circuits
- tuning
- condenser
- 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
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
392,158. Valve circuits for wireless reception. PLESSEY CO., Ltd., Vicarage Lane, Ilford, Essex, and BAILEY, C. E. G., 5, Guildford Street, Russell Square, London. Nov. 9, 1931, No. 31077. [Class 40 (v).] In a superheterodyne receiver with ganged tuning for the local oscillator circuit 28, 31 and the circuit 11 .. 14 tuned to the received signal, the tuning apparatus is adapted to cover a second waveband without spoiling the ganging by switching an inductance 17 in one of the circuits and a compound impedance 29, 34, 35 in the other circuit. A plurality of circuits tuned to the received signal is used and an additional inductance inserted in each by switches 18. The compound impedance comprises an inductance 29 connected by a switch 30 in the oscillator circuit and coupled to an auxiliary inductance 34 in parallel. with a condenser 35. This circuit resonates at a frequency approximately to the lowest frequency of the long-wave band, and the inductance 34 is made of thin or high-resistance wire to flatten the resonance curve so that the effect extends over about half the tuning range. According to a modification, the compound impedance comprises an inductance in series with a condenser, Fig. 2 (not shown).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR743379D FR743379A (en) | 1931-11-09 | ||
| BE391330D BE391330A (en) | 1931-11-09 | ||
| GB3107731A GB392158A (en) | 1931-11-09 | 1931-11-09 | Improvements in or relating to radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3107731A GB392158A (en) | 1931-11-09 | 1931-11-09 | Improvements in or relating to radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB392158A true GB392158A (en) | 1933-05-09 |
Family
ID=10317603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3107731A Expired GB392158A (en) | 1931-11-09 | 1931-11-09 | Improvements in or relating to radio receivers |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE391330A (en) |
| FR (1) | FR743379A (en) |
| GB (1) | GB392158A (en) |
-
0
- FR FR743379D patent/FR743379A/fr not_active Expired
- BE BE391330D patent/BE391330A/xx unknown
-
1931
- 1931-11-09 GB GB3107731A patent/GB392158A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR743379A (en) | 1933-03-29 |
| BE391330A (en) |
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