By Topic

Radio Engineers, Proceedings of the Institute of

Issue 5 • Date Oct. 1925

Filter Results

Displaying Results 1 - 12 of 12
  • [Front cover]

    Page(s): c1 - c2
    Save to Project icon | Request Permissions | PDF file iconPDF (1113 KB)  
    Freely Available from IEEE
  • Contents

    Page(s): 533
    Save to Project icon | Request Permissions | PDF file iconPDF (176 KB)  
    Freely Available from IEEE
  • General Information

    Page(s): 533
    Save to Project icon | Request Permissions | PDF file iconPDF (176 KB)  
    Freely Available from IEEE
  • Officers and Board of Direction, 1925

    Page(s): 534
    Save to Project icon | Request Permissions | PDF file iconPDF (106 KB)  
    Freely Available from IEEE
  • Institute activities

    Page(s): 535 - 537
    Save to Project icon | Request Permissions | PDF file iconPDF (365 KB)  
    Freely Available from IEEE
  • Full text access may be available. Click article title to sign in or learn about subscription options.
  • Trans-Oceanic Radio Station-Warsaw, Poland

    Page(s): 571 - 588
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6488 KB)  

    A brief history and description of the Warsaw Trans-oceanic Radio Station as constructed and installed for the Government of Poland by the Radio Corporation of America is given. A technical description of the details of the system used is not given, as the system is similar in all respects to that in use in the United States by the Radio Corporation. Papers on this system have been given before this INSTITUTE and before the American Institute of Electrical Engineers by Messrs. Alexanderson, Beverage, and others. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Application of the X-L Filament to Power Tubes

    Page(s): 589 - 609
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4120 KB)  

    The properties of the X-L or thoriated tungsten filament are discussed with particular reference to the suitability of this material for use in power tubes and its advantages over other materials. Comparisons are given between pure tungsten and thoriated tungsten filaments in electron emission characteristics and effect on tube design and performance. Several power tubes containing X-L filaments are described in detail. The improvements due to the use of the X-L filament are illustrated by comparison of these tubes with older types of tubes containing pure tungsten filaments. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Detecting Characteristics of Electron Tubes

    Page(s): 611 - 623
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1544 KB)  

    It is pointed out that owing to the progress of the radio art the opinions heretofore held as to the importance of the part played by detector efficiency in a receiving set are in need of revision. Taking the well-known analysis of the operation of a detector tube with condenser and grid leak, curves are derived from the static characteristics of a typical general purpose tube showing the performance of the tube as a detector under certain conditions of operation. A method is described of measuring the output of a detector tube with a standard incoming signal, and experimental results obtained with the tube used for deriving the curves are compared with those obtained from theoretical considerations, showing that the method can be used to give a true picture of the effect on detector efficiency of variations in operating conditions. Sample curves are given, showing the wide variations obtained in the efficiency of certain types of standard tubes by relatively slight changes from the customary operating conditions, and also the variations in efficiency of a number of similar tubes under normal operating conditions. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Life Testing of Tungsten Filament Triodes

    Page(s): 625 - 645
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3592 KB)  

    It is first pointed out that triodes are life tested primarily as an aid to the manufacturers in proving their performance and useful length of service rather than to obtain any average life figure. The apparatus employed and its method of operation, together with the procedure in handling the data, is next described. Some actual results obtained are then given to illustrate the methods employed and results obtained. These results are given in the form of tables and curves. One point emphasized thruout the paper is that triode life is just as much a variable as other factors such as electron emission or impedance. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digests of United States Patents relating to radio telegraphy and telephony

    Page(s): 651 - 669
    Save to Project icon | Request Permissions | PDF file iconPDF (3897 KB)  
    Freely Available from IEEE

Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope