GB662539A - Improvements in or relating to radio and like transmitters - Google Patents
Improvements in or relating to radio and like transmittersInfo
- Publication number
- GB662539A GB662539A GB3190748A GB3190748A GB662539A GB 662539 A GB662539 A GB 662539A GB 3190748 A GB3190748 A GB 3190748A GB 3190748 A GB3190748 A GB 3190748A GB 662539 A GB662539 A GB 662539A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chokes
- anodes
- source
- circuits
- common
- 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
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
- H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
662,539. Modulating systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 23, 1949 [Dec. 9, 1948], No. 31907/48. Class 40 (v). The invention relates to radio transmitters, of the kind shown in Fig. 1, in which phasemodulated waves are fed to the grids of valves V1, V2, the anodes of which are connected through quarter-wave lines or networks N1, N2 to a common aerial or other load R, to produce an amplitude-modulated wave therein. In order that the anodes of the valves may be substantially free from mutual coupling through the supply circuits, various modifications of the de-coupling circuits are provided. In one arrangement separate similar HT sources are provided for the respective valves. In another arrangement, a common H.T. source is connected through parallel-resonant circuits replacing the chokes CH1, CH2. Alternatively, the chokes and byepass condensers BC1, BC2 are retained, but an additional impedance or filter is provided between the H.T. source and at least one of the chokes. In a further circuit, Fig. 2, the common H.T. source is connected to the anodes through one or more parallel-tuned circuits PT and through the inductances of the networks N1, N2; and a blocking condenser BK is interposed between the circuit PT and the load R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3190748A GB662539A (en) | 1948-12-09 | 1948-12-09 | Improvements in or relating to radio and like transmitters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3190748A GB662539A (en) | 1948-12-09 | 1948-12-09 | Improvements in or relating to radio and like transmitters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB662539A true GB662539A (en) | 1951-12-05 |
Family
ID=10330164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3190748A Expired GB662539A (en) | 1948-12-09 | 1948-12-09 | Improvements in or relating to radio and like transmitters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB662539A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092523B (en) * | 1958-03-20 | 1960-11-10 | Philips Nv | Device for changing the frequency of an oscillator |
-
1948
- 1948-12-09 GB GB3190748A patent/GB662539A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092523B (en) * | 1958-03-20 | 1960-11-10 | Philips Nv | Device for changing the frequency of an oscillator |
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