GB289999A - Improvements in or relating to wireless transmitting apparatus - Google Patents
Improvements in or relating to wireless transmitting apparatusInfo
- Publication number
- GB289999A GB289999A GB671527A GB671527A GB289999A GB 289999 A GB289999 A GB 289999A GB 671527 A GB671527 A GB 671527A GB 671527 A GB671527 A GB 671527A GB 289999 A GB289999 A GB 289999A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- frequency
- aerial
- anode
- grid
- 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
- H03C—MODULATION
- H03C1/00—Amplitude modulation
Landscapes
- Transmitters (AREA)
Abstract
289,999. Midgley, A. H. March 10, 1927. Addition to 280,981. Thermionic modulators.-A five-electrode valve constructed as described in the parent Specification is associated with external circuits in such a way as to generate high-frequency oscillations which are simultaneously modulated. As shown in the Figure, the anode A1 and grid G1 are coupled through a tuned circuit 1, 2 to generate oscillations of a frequency determined by the setting of the condenser 2, or by the condenser 4 if the first condenser is omitted. The grid G2 and cathode K are coupled to a circuit comprising a source of low-frequency current, such as the microphone 6, the amplified output from the anode A2 being applied by a tapping to the main inductance 1 to modulate the high-frequency currents fed to the aerial AE. The modulated output may be further amplified, either by using other similar valves connected in parallel, or by being passed through a series of standard amplifiers before reaching the aerial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB671527A GB289999A (en) | 1927-03-10 | 1927-03-10 | Improvements in or relating to wireless transmitting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB671527A GB289999A (en) | 1927-03-10 | 1927-03-10 | Improvements in or relating to wireless transmitting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB289999A true GB289999A (en) | 1928-05-10 |
Family
ID=9819448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB671527A Expired GB289999A (en) | 1927-03-10 | 1927-03-10 | Improvements in or relating to wireless transmitting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB289999A (en) |
-
1927
- 1927-03-10 GB GB671527A patent/GB289999A/en not_active Expired
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