PL9975B1

PL9975B1 - Receiver with shielded lamps.

Info

Publication number: PL9975B1
Application number: PL9975A
Authority: PL
Filing date: 1928-04-19
Publication date: 1929-03-30

Description

Pomysl niniejszy dotyczy specjalnego odbiornika, w którym zastosowano lampy ekranowane. Dwie pierwsze od anteny lam¬ py tego odbiornika sa to lampy ekranowa¬ ne, które pracuja w ukladzie wzmacniacza wielkiej czestotliwosci. Trzy ostatnie lam¬ py sa jednosiatkowe i pracuja: pierwsza w ukladzie detektorowym, dwie zas ostat¬ nie — w ukladzie wzmacniacza malej cze¬ stotliwosci lub transformatorowym lub tez oporowym. Zakres fal zasadniczy od 10 do 2000 m. Zasieg —» wszystkie stacje euro¬ pejskie oraz krótkofalowe amerykanskie.Calosc moze byc umieszczona w skrzy¬ ni drewnianej lub innej, wzmacniacz zas wielkiej czestotliwosci z lampami ekrano¬ wanemi oraz obwód anteny oprócz tego sa ekranowane, kazdy obwód oddzielnie.Odbiornik cechuje sie duza selektyw¬ noscia, mozliwoscia odbioru fal bardzo krótkich do 10 m wdól, jak równiez i dlu¬ gich fal do 2000 m i wyzej, oraz bardzo wielkiem wzmocnieniem odbieranych sy¬ gnalów.Schemat ogólny odbiornika jest poka¬ zany na fig. 1 i fig. 2 rysunków. PL PLThis idea concerns a special receiver that uses shielded lamps. The first two lamps from the antenna of this receiver are screened tubes, which operate in the high frequency amplifier circuit. The last three lamps are single-mesh and work: the first in the detector system, the last two - in the low-frequency amplifier or transformer or resistance amplifier. Main wave range from 10 to 2000 m. Range - »all European and American shortwave stations. The whole thing can be placed in a wooden or other box, the high-frequency amplifier with shielded lamps and the antenna circuit are also shielded, each circuit separately. The receiver is characterized by high selectivity, the ability to receive very short waves up to 10 m down, as well as long waves up to 2000 m above, and a very great amplification of received signals. The general diagram of the receiver is shown in Fig. 1 and Fig. 2 of the drawings. PL PL

Claims

1. Patent claims. 1. A radio receiver operating with shielded lamps, characterized by an aperiodic antenna connected by a capacitor with a very small capacity or directly to the inductance of the grid circuit of the first lamp, or a coil inductively connected to this circuit . 2. The receiver according to claim 1. 1, the significant point is that the aperiodic antenna can be connected in a variable manner by means of plugs or switches. 3. Receiver according to claim The method of claims 1 and 2, characterized by the use of a choke reinforcement system in the anode and the connection of the anode circuit to the grid circumference in the center of the astatic coil (binocular or with astatine windings) lying in the perimeter of the grid. 4. Receiver system according to claim The method of any of the claims 1 to 3, characterized by the use of a high frequency response from the detector tube in the last circuit in any pattern. 5. Arrangement of the receiver as shown. A method according to any one of claims 1-4, characterized by the use of a double arc resistor connected between the ground (screen) and the common negative of the heat and anode batteries in order to switch off the anode battery with the lamps off. Polish Radio Engineering Society ,, P. T. R '\ Spółka Akcyjna. To the patent description No. 9975. Ark. i. [ptlfr-Hh 3 * * * f * TT A— ~ * -—- 4 ^ -— n n n n J1 /*./. jd n n n To patent specification No. 9975. Ark.

2. Fia. £ "Print by L. Boguslawski, Warsaw. PL PL