GB419885A - Improvements in or relating to superheterodyne radio receivers - Google Patents
Improvements in or relating to superheterodyne radio receiversInfo
- Publication number
- GB419885A GB419885A GB1484433A GB1484433A GB419885A GB 419885 A GB419885 A GB 419885A GB 1484433 A GB1484433 A GB 1484433A GB 1484433 A GB1484433 A GB 1484433A GB 419885 A GB419885 A GB 419885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- valve
- grid
- resistance
- control
- 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
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuits Of Receivers In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
419,885. Valve circuits for wireless reception. COLE, Ltd., E. K., Ekco Works, Priory Crescent, Southend-on-Sea, and BRADFIELD, G., 161, Hainault Avenue, Westcliffon-Sea. May 23, 1933, No. 14844. [Class 40 (v).] Automatic volume control potentials are applied to at least one of the electrodes of a multigrid valve of the type in which a " virtual cathode " exists on or between two of the grids by virtue of the external connections which are also arranged so that the valve electrodes act as an amplifier and an oscillator, in that order, between the main cathode and anode. As shown, said valve comprises the detectoroscillator valve A of a superheterodyne receiver, the signals being applied from an input circuit a to the first control grid 2 which is surrounded by a screen grid 3 suppressor grid 4, intermediate anode 5, second control grid 6 and main anode 7. The suppressor grid 4 may be adjacent the main anode 7. The anode 5 is connected through a tuned circuit e, condenser d, earth, and resistance c shunted by condenser b to the cathode 1, and also through condenser f to the control electrode 6 to produce oscillations of the frequency of the circuit e. The anode 5 is supplied with positive potential from the anode resistance n of the pentode intermediate frequency amplifier B which feeds a diode-triode valve C provided for second detection and low frequency amplification. The load resistance k of the diode rectifier is tapped to provide D.C. automatic volume control potentials for the grids 2, 6 of valve A and the control grid of valve B through known filter circuits. Further control is effected by the changes of potential of the anode 5 due to changes in the current flowing through resistance n. Specification 408,256 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1484433A GB419885A (en) | 1933-05-23 | 1933-05-23 | Improvements in or relating to superheterodyne radio receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1484433A GB419885A (en) | 1933-05-23 | 1933-05-23 | Improvements in or relating to superheterodyne radio receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419885A true GB419885A (en) | 1934-11-21 |
Family
ID=10048476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1484433A Expired GB419885A (en) | 1933-05-23 | 1933-05-23 | Improvements in or relating to superheterodyne radio receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419885A (en) |
-
1933
- 1933-05-23 GB GB1484433A patent/GB419885A/en not_active Expired
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