GB271447A - Improvements in or relating to the transmission of telegraphic signals with continuous-wave transmitters - Google Patents
Improvements in or relating to the transmission of telegraphic signals with continuous-wave transmittersInfo
- Publication number
- GB271447A GB271447A GB12109/27A GB1210927A GB271447A GB 271447 A GB271447 A GB 271447A GB 12109/27 A GB12109/27 A GB 12109/27A GB 1210927 A GB1210927 A GB 1210927A GB 271447 A GB271447 A GB 271447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- grid
- energy
- valve
- thermionic
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Abstract
271,447. Naamlooze Vennootschap Nederlandsche Seintoestellenfabriek. May 22, 1926, [Convention date]. Thermionic generators and keying systems.- A thermionic transmitter has a contact Y adapted to open a high-frequency circuit and another contact Y to make the grid negative at the same moment by bringing into the plate circuit a resistance D having its end connected to a grid resistance C in order that the energy extracted from the high-tension source F remains constant whether the key is depressed or not. The resistance D is variable to permit regulation of the energy passing through the valve in the non- oscillatory state and is shunted by a condenser E to avoid low-frequency oscillation. The value of the resistance is so chosen that an automatic regulation ensues when the energy supplied to the valve is varied. For example if the energy supplied increases, the plate current also increases thus causing the grid potential to decrease.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL271447X | 1926-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB271447A true GB271447A (en) | 1927-09-29 |
Family
ID=19781955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12109/27A Expired GB271447A (en) | 1926-05-22 | 1927-05-05 | Improvements in or relating to the transmission of telegraphic signals with continuous-wave transmitters |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR636700A (en) |
| GB (1) | GB271447A (en) |
| NL (1) | NL19143C (en) |
-
0
- NL NL19143D patent/NL19143C/xx active
- FR FR636700D patent/FR636700A/fr not_active Expired
-
1927
- 1927-05-05 GB GB12109/27A patent/GB271447A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR636700A (en) | 1928-04-14 |
| NL19143C (en) |
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