GB326859A - Improvements in thermionic valve circuits - Google Patents
Improvements in thermionic valve circuitsInfo
- Publication number
- GB326859A GB326859A GB3439928A GB3439928A GB326859A GB 326859 A GB326859 A GB 326859A GB 3439928 A GB3439928 A GB 3439928A GB 3439928 A GB3439928 A GB 3439928A GB 326859 A GB326859 A GB 326859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- varying
- valve
- coil
- valves
- 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
- H04B1/22—Circuits for receivers in which no local oscillation is generated
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
326,859. Hayden, H., R. Nov. 22, 1928. Thermionic amplifiers and deteetors.-In a multi-stage thermionicvalve circuit supplied from a source of varying voltage, inter-valve couplings are so constructed and arranged that the effect of the varying voltage on the plate circuit of the last valve 46 is neutralized by the variations applied to its grid by the net effect of the varying voltage of the source on the preceding valves. The source of varying voltage comprises a rectifier 89, which supplies plate current through an impedance 94 and shunt condensers 98, 99 arranged on opposite sides of the impedance and having a combined capacity of less than 7 microfarads. Resistance-capacity coupled amplifying-valves 30, 40, 46 are connected across the output 93, 95 from the filter, and a detecting-valve 16 is connected across a condenser 110 in series with a variable resistance 100. Hum is eliminated by varying the plate voltage of the detector by the resistance 100, and by varying the grid bias of the amplifying-valves by a potentiometer 65 and of the detecting-valve by a variable grid leak 21 and condenser 20. A grid coil 13 is wound on a cylindrical former and spaced from an aerial coil 12 by grooved strips, and a reaction coil 22 is wound on a cylindrical former within the grid coil, and mounted on a rotary spindle (Figs. 2-5, not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3439928A GB326859A (en) | 1928-11-22 | 1928-11-22 | Improvements in thermionic valve circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3439928A GB326859A (en) | 1928-11-22 | 1928-11-22 | Improvements in thermionic valve circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB326859A true GB326859A (en) | 1930-03-24 |
Family
ID=10365160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3439928A Expired GB326859A (en) | 1928-11-22 | 1928-11-22 | Improvements in thermionic valve circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB326859A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2139003A (en) * | 1983-04-08 | 1984-10-31 | Gen Electric Co Plc | Electrical windings |
-
1928
- 1928-11-22 GB GB3439928A patent/GB326859A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2139003A (en) * | 1983-04-08 | 1984-10-31 | Gen Electric Co Plc | Electrical windings |
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