GB492635A - Improvements in superheterodyne receiving apparatus - Google Patents
Improvements in superheterodyne receiving apparatusInfo
- Publication number
- GB492635A GB492635A GB2049/38A GB204938A GB492635A GB 492635 A GB492635 A GB 492635A GB 2049/38 A GB2049/38 A GB 2049/38A GB 204938 A GB204938 A GB 204938A GB 492635 A GB492635 A GB 492635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jan
- indicator
- frequency
- tuning
- receiving apparatus
- 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
- H03J3/02—Details
- H03J3/12—Electrically-operated arrangements for indicating correct tuning
- H03J3/14—Visual indication, e.g. magic eye
Landscapes
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
492,635. Wireless receiving circuits. FABBRICA ITALIANA MAGNETI MARELLI. Jan. 21, 1938, No. 2049. Convention date, Jan. 22, 1937. [Class 40 (v)] In a superheterodyne receiver with automatic frequency control, the disadvantage of leaving the radio frequency stages slightly detuned when the A.F.C. has adjusted the local oscillator frequency to give the true I.F. is obviated by providing a tuning indicator 5, preferably of the cathode-ray type, by means of which the tuning condition of the preselector may be observed and manual adjustment may be made to almost exact tune. The indicator 5 which is energized from a diode rectifier 3, may be connected either to the input or output side of the frequency changer CV-LO. Specifications 456,928 and 471,738 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT204092X | 1937-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB492635A true GB492635A (en) | 1938-09-23 |
Family
ID=11166482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2049/38A Expired GB492635A (en) | 1937-01-22 | 1938-01-21 | Improvements in superheterodyne receiving apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH204092A (en) |
| DE (1) | DE687642C (en) |
| GB (1) | GB492635A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010007731A1 (en) | 2010-02-12 | 2011-08-18 | Magna Car Top Systems GmbH, 74321 | Storm bar device for folding-top of passenger car, has storm bar levers provided between clamp bracket and roof frame, where length adjuster is supported at one of levers and frame and has set screw accessibly attached at folding-top |
-
1937
- 1937-05-12 DE DE1937F0083006 patent/DE687642C/en not_active Expired
-
1938
- 1938-01-20 CH CH204092D patent/CH204092A/en unknown
- 1938-01-21 GB GB2049/38A patent/GB492635A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE687642C (en) | 1940-02-02 |
| CH204092A (en) | 1939-04-15 |
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