GB331969A - Improvements in or relating to wireless receivers - Google Patents
Improvements in or relating to wireless receiversInfo
- Publication number
- GB331969A GB331969A GB13615/29A GB1361529A GB331969A GB 331969 A GB331969 A GB 331969A GB 13615/29 A GB13615/29 A GB 13615/29A GB 1361529 A GB1361529 A GB 1361529A GB 331969 A GB331969 A GB 331969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- waves
- long
- frequency
- band
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Superheterodyne Receivers (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Toys (AREA)
Abstract
331,969. Gramophone Co., Ltd., and Bailey, C. E. G. May 1, 1929. Thermionic heterodyne receivers; thermionic amplifiers. - A receiver having a plurality of tuned circuits 11, 12, 13 controlled by means of a single controlling member is adapted to operate as a " straight " receiver on a band of relatively short wavelengths and to operate as a supersonic heterodyne, receiver on a band of relatively long wavelengths. The Figure shows a receiver in which for waves of 200 to 600 metres the aerial potentiometer 2 is connected to the grid of the first high-frequency amplifying valve 5. For long waves the signals are applied to a detector 4 together with a frequency of 600 kilocycles from an oscillator 3 to give a sum frequency which is applied to the amplifier 5. Switches 14, 15, 16 which are preferably ganged, effect the change from long to short waves.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13615/29A GB331969A (en) | 1929-05-01 | 1929-05-01 | Improvements in or relating to wireless receivers |
| DE1930574010D DE574010C (en) | 1929-05-01 | 1930-03-28 | Radio receiver for receiving medium and long waves |
| US447693A US2038918A (en) | 1929-05-01 | 1930-04-26 | Wireless receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB13615/29A GB331969A (en) | 1929-05-01 | 1929-05-01 | Improvements in or relating to wireless receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB331969A true GB331969A (en) | 1930-07-17 |
Family
ID=10026253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13615/29A Expired GB331969A (en) | 1929-05-01 | 1929-05-01 | Improvements in or relating to wireless receivers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2038918A (en) |
| DE (1) | DE574010C (en) |
| GB (1) | GB331969A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601475A (en) * | 1948-08-28 | 1952-06-24 | Rca Corp | Frequency converter for am-fm receivers |
-
1929
- 1929-05-01 GB GB13615/29A patent/GB331969A/en not_active Expired
-
1930
- 1930-03-28 DE DE1930574010D patent/DE574010C/en not_active Expired
- 1930-04-26 US US447693A patent/US2038918A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2038918A (en) | 1936-04-28 |
| DE574010C (en) | 1933-04-07 |
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