GB413195A - Ultra-short wave auxiliary apparatus for radio receivers - Google Patents
Ultra-short wave auxiliary apparatus for radio receiversInfo
- Publication number
- GB413195A GB413195A GB33703/33A GB3370333A GB413195A GB 413195 A GB413195 A GB 413195A GB 33703/33 A GB33703/33 A GB 33703/33A GB 3370333 A GB3370333 A GB 3370333A GB 413195 A GB413195 A GB 413195A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerial
- valve
- grid
- oscillatory circuit
- dec
- 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
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers
-
- 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
- H03D7/08—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 the same two electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Amplifiers (AREA)
- Superheterodyne Receivers (AREA)
- Microwave Amplifiers (AREA)
Abstract
413,195. Valve currents for wireless reception. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, and SCHLESINGER, K., 39, Friedrichstrasse, Friedrichshagen, both in Berlin. Dec. 1, 1933, No. 33703. Convention date, Dec. 2, 1932. [Class 40 (v).] A short-wave adapter designed to cover wave-bands between 5 and 120 metres is characterized by the use of a combined detector, oscillator and mixer valve 1, backcoupled through the oscillatory circuit 8, 9 and the inherent valve capacities. The resulting beat frequencies are fed through the amplifier 18 to the input 63 of a standard broadcast receiver. The aerial is coupled to the oscillatory circuit 8, 9, across the anode and grid, by a small condenser 12 to reduce the effects of aerial capacity. The anode and grid resistances 6, 7 are of the low-capacity type and are preferably enclosed in the bulb of the valve 1. The intermediate-frequency is passed from the coupling-resistance 6, condensers 11, 16 and choke 20 to a tuned circuit 38, 40 across the grid and cathode of the amplifier 18. To prevent the oscillation frequency from leaking back into the aerial, the input arrangement shown in Fig. 2 may be used in which the moving plates of the condenser 50 are directly connected to the aerial whilst the fixed plates are across the oscillatory circuit 8, 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER102329D DE714587C (en) | 1932-12-03 | 1932-12-03 | Ultra short wave attachment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB413195A true GB413195A (en) | 1934-07-12 |
Family
ID=6477603
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33703/33A Expired GB413195A (en) | 1932-12-03 | 1933-12-01 | Ultra-short wave auxiliary apparatus for radio receivers |
| GB28403/34A Expired GB429419A (en) | 1932-12-03 | 1933-12-01 | Ultra-short wave reception device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28403/34A Expired GB429419A (en) | 1932-12-03 | 1933-12-01 | Ultra-short wave reception device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2044229A (en) |
| BE (1) | BE400079A (en) |
| DE (1) | DE714587C (en) |
| FR (1) | FR764942A (en) |
| GB (2) | GB413195A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE880326C (en) * | 1948-10-02 | 1953-06-22 | Telefunken Gmbh | Community radio reception system |
| NL148283B (en) * | 1949-03-03 | Grove Mfg Co | MULTI-PIECE, HYDRAULIC TELESCOPABLE CRANE ARM. |
-
1932
- 1932-12-03 DE DER102329D patent/DE714587C/en not_active Expired
-
1933
- 1933-11-29 US US700283A patent/US2044229A/en not_active Expired - Lifetime
- 1933-11-30 FR FR764942D patent/FR764942A/en not_active Expired
- 1933-12-01 GB GB33703/33A patent/GB413195A/en not_active Expired
- 1933-12-01 GB GB28403/34A patent/GB429419A/en not_active Expired
- 1933-12-02 BE BE400079D patent/BE400079A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR764942A (en) | 1934-05-30 |
| US2044229A (en) | 1936-06-16 |
| BE400079A (en) | 1934-01-31 |
| GB429419A (en) | 1935-05-29 |
| DE714587C (en) | 1941-12-03 |
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