AT136148B - Ultra short wave receiver. - Google Patents
Ultra short wave receiver.Info
- Publication number
- AT136148B AT136148B AT136148DA AT136148B AT 136148 B AT136148 B AT 136148B AT 136148D A AT136148D A AT 136148DA AT 136148 B AT136148 B AT 136148B
- Authority
- AT
- Austria
- Prior art keywords
- wave receiver
- short wave
- ultra short
- frequency
- ultra
- Prior art date
Links
- 230000009977 dual effect Effects 0.000 claims description 2
Landscapes
- Noise Elimination (AREA)
Description
<Desc/Clms Page number 1>
Ultrakurzwellenempfänger.
EMI1.1
<Desc/Clms Page number 2>
frequenzteiles bezeichnet. Aus der Figur ist ohne weiteres zu ersehen, dass der aufgenommene Sender in seiner Frequenz und damit in seinem Frequenzband schwanken kann und trotzdem immer noch vom Zwisehenfrequenzempfänger durchgelassen wird. Man wird z. B. bei einem normal modulierten Telephoniesender etwa den Durchlassbereich 100.000 Hertz wählen. Wenn gleichzeitig, wie bereits angegeben, durch indirekt geheizte Röhren und Glimmspannungsteiler die Frequenz des Überlagerers konstant gehalten wird, so ist ein einwandfreier Überlagerungsempfang auch bei Ultrakurzwellen möglich.
Es ist selbstverständlich, dass der Erfindungsgedanke sich nicht nur auf die dargestellte Sehaltungsanordnung mit Fremdüberlagerung anwenden lässt, sondern auch bei solchen Anlagen, bei denen die Überlagerungsfrequenz in derselben Röhre erzeugt wird, in der der Überlagerungsvorgang der ankommenden mit der erzeugten Überlagerungsfrequenz stattfindet. Auch ist es gleichgültig, ob eine Frequenzheraufsetzung, von der Trägerfrequenz des empfangenen Senders aus gerechnet, oder eine-herabsetzung, wie dies allerdings meist der Fall ist, durchgeführt wird.
PATENT-ANSPRÜCHE :
1. Ultrakurzwellenempfänger, dadurch gekennzeichnet, dass die Empfangsanordnung, vorzugsweise die Schwingröhre, mit indirekt geheizten Kathoden ausgerüstet ist, die an einen Glimmspannungsteiler angeschlossen sind.
<Desc / Clms Page number 1>
Ultra short wave receiver.
EMI1.1
<Desc / Clms Page number 2>
frequency part referred to. From the figure it can be readily seen that the recorded transmitter can fluctuate in its frequency and thus in its frequency band and is still let through by the dual frequency receiver. One will z. B. for a normally modulated telephone transmitter select about the passband 100,000 Hertz. If at the same time, as already stated, the frequency of the superimposer is kept constant by indirectly heated tubes and glow voltage divider, perfect superimposition reception is possible even with ultra-short waves.
It goes without saying that the concept of the invention can be applied not only to the illustrated arrangement with external superimposition, but also to systems in which the superimposition frequency is generated in the same tube in which the superimposition of the incoming with the generated superimposition frequency takes place. It is also irrelevant whether a frequency increase, calculated from the carrier frequency of the received transmitter, or a decrease, as is usually the case, is carried out.
PATENT CLAIMS:
1. Ultra-short wave receiver, characterized in that the receiving arrangement, preferably the oscillating tube, is equipped with indirectly heated cathodes which are connected to a glow voltage divider.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE136148X | 1931-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT136148B true AT136148B (en) | 1934-01-10 |
Family
ID=5666266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT136148D AT136148B (en) | 1931-01-31 | 1932-01-13 | Ultra short wave receiver. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT136148B (en) |
-
1932
- 1932-01-13 AT AT136148D patent/AT136148B/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AT136148B (en) | Ultra short wave receiver. | |
| US2061740A (en) | Receiving circuit for broadcast apparatus | |
| US2266713A (en) | Method of and means for reducing disturbances in wireless reception | |
| AT129549B (en) | Method of telegraphing and telephoning by means of electrical waves. | |
| DE565817C (en) | Feedback tube generator | |
| AT145006B (en) | Method for modulating high-frequency transmitters. | |
| DE734230C (en) | Radio receiver with loss compensation | |
| AT131317B (en) | Receiving device for wireless transmission of characters by means of short waves. | |
| AT142041B (en) | Feedback arrangement for wave ranges with frequencies of different magnitudes. | |
| DE659551C (en) | Antenna coupling for direction finding purposes | |
| AT125887B (en) | Receiver circuit for waves of various sizes. | |
| DE675278C (en) | Device for transmitting and receiving speech by means of sound waves, in particular in water | |
| DE700446C (en) | Overlay receiver that can be switched to straight-ahead reception | |
| US2156702A (en) | Receiving apparatus for communication systems | |
| DE869361C (en) | Method for wireless multiple reception | |
| US1388441A (en) | Multiple antenna for electrical wave transmission | |
| DE582341C (en) | Circuit arrangement for audio frequency call rates | |
| AT135804B (en) | Intermediate frequency heterodyne receiver. | |
| AT132516B (en) | Arrangement for the purpose of relieving the reception of wired or wirelessly transmitted non-modulated alternating currents or electromagnetic waves from interfering noises and undesired modulations. | |
| DE540266C (en) | Circuit for receiving high-frequency characters | |
| US2224115A (en) | Band-filter coupling circuit for television amplifiers | |
| DE743754C (en) | Electric sound source with a uniform sound spectrum | |
| AT107511B (en) | Method for frequency-constant interference reception of wireless symbols. | |
| DE936760C (en) | Circuit arrangement for receiver for frequency- or phase-modulated oscillations | |
| AT138501B (en) | 2Methods of telegraphing and telephoning electrical waves. |