GB437316A - Improvements relating to thermionic valve circuits - Google Patents
Improvements relating to thermionic valve circuitsInfo
- Publication number
- GB437316A GB437316A GB2153034A GB2153034A GB437316A GB 437316 A GB437316 A GB 437316A GB 2153034 A GB2153034 A GB 2153034A GB 2153034 A GB2153034 A GB 2153034A GB 437316 A GB437316 A GB 437316A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potentiometer
- detector
- pick
- fixed
- low frequency
- 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
- H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
437,316. Wireless receiving-apparatus. SOWERBY, A. L. M., 85, Westbourne Grove, and COSSOR, Ltd., A. C., Highbury Grove, both in London. July 23, 1934, No. 21530. [Class 40 (v)] In a wireless receiver adapted to be used with an electric pick-up, the detector is coupled to the low frequency amplifier system through a fixed potentiometer which reduces the output to a strength equivalent to that of the signals derived from the pick-up. Figure 1 shows resistances R1, R2 arranged as a fixed potentiometer between the detector D and low frequency amplifier V. A condenser C3 is preferably provided to prevent loss of higher frequencies due to the self capacity C4 and may be increased in size to give compensation for any loss of high notes arising in other parts of the receiver. Volume is controlled by potentiometer R3, R4 for both radio and the pick-up which is connected to terminals PU. In a modification, Fig. 2, the volume control forms part of the detector load and a fixed grid leak R5 is used the fixed potentiometer being formed by resistances R1, R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2153034A GB437316A (en) | 1934-07-23 | 1934-07-23 | Improvements relating to thermionic valve circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2153034A GB437316A (en) | 1934-07-23 | 1934-07-23 | Improvements relating to thermionic valve circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB437316A true GB437316A (en) | 1935-10-28 |
Family
ID=10164456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2153034A Expired GB437316A (en) | 1934-07-23 | 1934-07-23 | Improvements relating to thermionic valve circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB437316A (en) |
-
1934
- 1934-07-23 GB GB2153034A patent/GB437316A/en not_active Expired
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