DE420400C - Circuit for separately excited tube transmitters - Google Patents
Circuit for separately excited tube transmittersInfo
- Publication number
- DE420400C DE420400C DET28643D DET0028643D DE420400C DE 420400 C DE420400 C DE 420400C DE T28643 D DET28643 D DE T28643D DE T0028643 D DET0028643 D DE T0028643D DE 420400 C DE420400 C DE 420400C
- Authority
- DE
- Germany
- Prior art keywords
- tube
- circuit
- grid
- separately excited
- amplifier
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Description
Schaltung für fremderregte Röhrensender. Zum Zwecke einfachster Bedienung ist ges bei fremderregten Sendern erwünscht, daß diejenige Gitterspannung, welche für den Betrieb der eigentlichen Verstärkerröhren benutzt wird, galvanisch von dem Schwingungskreis des Steuersenders abgenommen wird. Ferner ist es für das sichere Arbeiten der Verstärkerröhren zweckmäßig, daß derjenige Kreis, von dem die Gitterspannung abgenommen wird, möglichst viel Kapazität und wenig Selbstinduktion enthält und daß die Spannung unmittelbar von den Klemmen des Kreiskondensators abgenommen wird. Je größer die Kapazität in dem Kreise, der am' Gitter der Verstärkerröhren liegt, ist, um so unwahrscheinlicher ist es, daß eine andere als die eingestellte Welle, etwa eine Parasitärwelle, auftritt.Circuit for separately excited tube transmitters. For ease of use it is desirable for separately excited transmitters that the grid voltage which for the operation of the actual amplifier tubes is used, galvanically from the Oscillation circuit of the exciter is removed. Furthermore, it is for the safe Working of the amplifier tubes expediently that that circle from which the grid voltage is removed, contains as much capacity and little self-induction as possible and that the voltage is taken directly from the terminals of the circular capacitor. The greater the capacitance in the circle that lies on the grid of the amplifier tubes, the less likely it is that a wave other than the one set, such as a parasitic wave occurs.
Eine geeignete Schaltweise ist in der Zeichnung beispielsweise dargestellt. Zwischen Gitter und Kathode des Steuer.-senderohres a liegt der eigentliche Schwingungskreis mit der Selbstinduktion b und der Kapazität c. Die Anodenkopplung erfolgt beispielsweise induktiv durch die Spule d. Der eine Pol des Kondensators ist über den Blockkondensator e mit dem Gitter des Schwingungsrohres rc und über 'den Blockkondensator f mit dem Gitter des Verstärkerrohres g verbunden. Der andere Pol von c steht in leitender Verbindung mit den Kathoden beider Röhren. Zwischen Gitter und Kathode beider Röhren liegt je .ein Gleichstromverbindungsweg, bestehend aus der Induktivität k bzw. h' und dem variablen Ohmschen Widerstand 1 bzw. i'. Für den Betrieb ist es erforderlich, daß man bis, zu einem gewissen Grade, unabhängig von dem Steuersender, die auf die Verstärkerröhre wirkende Gitterspannung regeln kann. Es kann das zweckmäßig geschehen durch die verschiedenartige Einwirkung auf den Gitterentladestrom der Steuerröhre gegenüber dem Verstärkerrohre, z. B. durch Anwendung der regelbaren Entladewiderstände i und i'. Ein besonderer Vorteil dieser Schaltung ist der, daß der Drehkondensator im Schwingungskreise nur für relativ geringere Spannungen auszuführen ist.A suitable switching method is shown in the drawing, for example. The actual oscillation circuit with self-induction b and capacitance c is located between the grid and the cathode of the control transmitter tube a. The anode coupling takes place, for example, inductively through the coil d. One pole of the capacitor is connected to the grid of the oscillation tube rc via the block capacitor e and to the grid of the amplifier tube g via the block capacitor f. The other pole of c is in conductive connection with the cathodes of both tubes. Between the grid and the cathode of both tubes there is a direct current connection path, consisting of the inductance k or h ' and the variable ohmic resistance 1 or i'. For operation it is necessary to be able to regulate, to a certain extent, the grid voltage acting on the amplifier tube, independently of the control transmitter. It can be done expediently by the various effects on the grid discharge current of the control tube with respect to the amplifier tubes, eg. B. by using the adjustable discharge resistors i and i '. A particular advantage of this circuit is that the variable capacitor in the oscillating circuit can only be designed for relatively lower voltages.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET28643D DE420400C (en) | 1924-03-15 | Circuit for separately excited tube transmitters |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET28643D DE420400C (en) | 1924-03-15 | Circuit for separately excited tube transmitters | |
DE230853X | 1924-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE420400C true DE420400C (en) | 1925-10-28 |
Family
ID=25764730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET28643D Expired DE420400C (en) | 1924-03-15 | Circuit for separately excited tube transmitters |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE420400C (en) |
-
0
- DE DET28643D patent/DE420400C/en not_active Expired
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