Radio Broadcast (May 1928-Apr 1929)

Manufacturers* Booklets A Varied List of Books Pertaining to Radio and Allied Subjects Obtainable Free With the Accompanying Coupon EADERS may obtain any of the booklets listed below by useing ihe coupon printed on Ibis page. Order by number only. 1. Filament Control — Problems of filament supply, voltage regulation, and effect on various circuits. 1928 revised booklet, with circuit diagrams of popular kits. Radiall Company. 2. Hard Rubber Panels — Characteristics and properties of hard rubber as used in radio, with suggestions on how to "work" it. B. F. Goodrich Rubber Company. 5. Carborundum in Radio — A book giving pertinent data on the crystal as used for detection, with hook-ups, and a section giving information on the use of resistors. The Carborundum Company. 9. Volume Control — A leaflet showing circuits for distortionless control of volume. Central Radio Laboratories. 10. Variable Resistance — As used in various circuits. Central Radio Laboratories. 12. Distortion and What Causes It— Hook-ups of resistance-coupled amplifiers with standard circuits. AllenBradley Company. 15. B-Eliminator and Power Amplifier — Instructions for assembly and operation using Raytheon tube. General Radio Company. 15a. B-Eliminator and Power Amplifier — Instructions for assembly and operation using an R. C. A. rectifier. General Radio Company. 17. Bakelite — A description of various uses of bakelite in radio, its manufacture, and its properties. Bakelite Corporation 22. A Primer of Electricity — Fundamentals of electricity with special reference to the application of dry cells to radio and other uses. Constructional data on buzzers, automatic switches, alarms, etc. National Carbon Company. 23. Automatic Relay Connections — A data sheet showing how a relay may be used to control A and B circuits. Yaxley Manufacturing Company. 26. Dry Cells for Transmitters — Actual tests given, well illustrated with curves showing exactly what may be expected of this type of B power. Burgess Battery Company. 30. Tube Characteristics — A data sheet giving constants of tubes. C. E. Manufacturing Company. 32. Meters for Radio — A catalogue of meters used in radio, with diagrams. Burton-Rogers Company. 33. Switchboard and Portable Meters — A booklet giving dimensions, specifications, and shunts used with various meters. Burton-Rogers Company. 36. Charging A and B Batteries — Various ways of connecting up batteries for charging purposes. Westinghouse Union Battery Company. 37. Why Radio is Better with Battery Power — Advice on what dry cell battery to use; their application to radio, with wiring diagrams. National Carbon Company. 46. Audio-Frequency Chokes — A pamphlet showing positions in the circuit where audio-frequency chokes may be used. Samson Electric Company. 47. Radio-Frequency Chokes — Circuit diagrams illustrating the use of chokes to keep out radio-frequency currents from definite points. Samson Electric Company. 48. Transformer and Impedance Data— Tables giving the mechanical and electrical characteristics of transformers and impedances, together with a short description of their use in the circuit." Samson Electric Company. 49. Bypass Condensers — A description of the manufacture of bypass and filter condensers. Leslie F. Muter Company. 50. Audio Manual — Fifty questions which are often asked regarding audio amplification, and their answers. Amertran Sales Company, Incorporated. 52. Audio Quality — A booklet dealing with audiofrequency amplification of various kinds and the application to well-known circuits. Silver-Marshall, Incorporated. 53. Tube Reactivator — Information on the care of vacuum tubes, with notes on how and when they should be reactivated. The Sterling Manufacturing Company. 56. Variable Condensers — A bulletin giving an analysis of various condensers together with their characteristics. General Radio Company. 57. Filter Data — Facts about the filtering of direct current supplied by means of motor-generator outfits used with transmitters. Electric Specialty Company. 58. How to Select a Receiver — A common-sense booklet describing what a radio set is, and what you should expect from it, in language that anyone can understand. Day-Fan Electric Company. 67. Weather for Radio — A very interesting booklet on the relationship between weather and radio reception, with maps and data on forecasting the probable results. Taylor Instrument Companies. 69. Vacuum Tubes — A booklet giving the characteristics of the various tube types with a short description of where they may be used in the circuit. Radio Corporation of America. 70. Improving the Audio Amplifier— Data on the characteristics of audio transformers, with a circuit diagram showing where chokes, resistors, and condensers can be used. American Transformer Company. 72. Plate Supply System — A wiring diagram and layout plan for a plate supply system to be used with a power amplifier. Complete directions for wiring are given. Amertran Sales Company. 73. Radio Simplified — A non-technical booklet giving pertinent data on various radio subjects. Of especial interest to the beginner and set owner. Crosley Radio Corporation. 76. Radio Instruments — A description of various meters used in radio and electrical circuits together with a short discussion of their uses. Jewell Electrical Instrument Company. 78. Electrical Troubles — A pamphlet describing the use of electrical testing instruments in automotive work combined with a description of the cadmium test for storage batteries. Of interest to the owner of storage batteries. Burton Rogers Company. 81. B etter Tuning — A booklet giving much general information on the subject of radio reception with specific illustrations. Primarily for the non-technical home constructor. Bremer-Tully Manufacturing Company. 83. Socket Power Device — A list of parts, diagrams, and templates for the construction and assembly of socket power devices. Jefferson Electric Manufacturing Company. 84. Five-Tube Equamatic — Panel layout, circuit diagrams, and instructions for building a five-tube receiver, together with data on the operation of tuned radio-frequency transformers of special design. Karas Electric Company. 85. Filter — Data on a high-capacity electrolytic condenser used in filter circuits in connection with A socket power supply units, are given in a pamphlet. The Abox Company'. 87. Tube Tester — A complete description of how to build and how to operate a tube tester. Burton-Rogers Company. 88. Super-Heterodyne Construction — A booklet giving full instructions, together with a blue print and necessary data, for building an eight-tube receiver. The George W. Walker Company. 89. Short-Wave Transmitter — Data and blue prints are given on the construction of a short-wave transmitter, together with operating instructions, methods of keying, and other pertinent data. Radio Engineering Laboratories. 90. Impedance Amplification — The theory and practice of a special type of dual-impedance audio amplification are given. Alden Manufacturing Company. 92. Resistors for A. C. Operated Receivers — A booklet giving circuit suggestions for building a.c. operated receivers, together with a diagram of the circuit used with the new 400-milliampere rectifier tube. Carter Radio Company, 93. B-Socket Power — A booklet giving constructional details of a socket-power device using either the BH or3i3 type rectifier. National Company, Incorporated. 95. Resistance Data — Successive bulletins regarding the use of resistors in various parts of the radio circuit. International Resistance Company. 96. Vacuum Tube Testing — A booklet giving pertinent data on how to test vacuum tubes with special reference to a tube testing unit. Jewell Electrical Instrument Company. 98. Copper Shielding — A booklet giving information on the use of shielding in radio receivers, with notes and diagrams showing how it may be applied practically. Of special interest to the home constructor. The Copper and Brass Research Association. 99. Radio Convenience Outlets — A folder giving diagrams and specifications for installing loud speakers in various locations at some distance from the receiving set. Yaxley Manufacturing Company. In sending the coupon belo<w, make sure that your name and address are included and are plainly written. Also make sure that the listing of booklets from which you choose is that of the latest issue of the magazine, as Radio Broadcast cannot guarantee the delivery of booklets not listed in its current issue. USE THIS BOOKLET COUPON Radio Broadcast Service Department Radio Broadcast, Garden City, hi . Y. Please send me (at no expense) the following booklets indicated by numbers in the published list above: Name (Number) {Street) Address (City) (State) ORDER BY NUMBER ONLY This coupon must accompany every request. R B 8-28 101. Using Chokes — A folder with circuit diagrams o( the more popular circuits showing where choke coils may be placed to produce better results. Samson Electric Company. 102. Radio Power Bulletins — Circuit diagrams, theory constants, and trouble-shooting hints for units employing the BH or B rectifier tubes. Raytheon Manufacturing Company. 103. A. C. Tubes — The design and operating characteristics of a new a.c. tube. Five circuit diagrams show how to convert well-known circuits. Sovereign Electric & Manufacturing Company. 104. Oscillation Control with the "Phasatrol" — Circuit diagrams, details for connection in circuit, and specific operating suggestions for using the "Phasatrol" as a balancing device to control oscillation. Electrad, Incorporated. 105. CoiLST-Excellent data on a radio-frequency coil with constructional infoimation on six broadcast receivers, two short-wave receivers, and several transmitting circuits. Aero Products Company. 106. Audio Transformer — Data on a hieh-quality audio transfoimer with circuits for use. Also useful data on detector and amplifier tubes. Sangamo Electric Company. 108. Vacuum Tubes — Operating characteristics of an a.c. tube with curves and circuit diagram for connection in converting various receivers to a.c. operation with a four-prong a.c. tube. Arcturus Radio Company. 110. Receiver Construction — Circuit diagram and constructional information for building a five-tube set using restricted field coils. Bodine Electric Company. 111. Storage Battery Care — Booklet describing the care and operation of the storage battery in the home. Marko Storage Battery Company. 1 12. Heavy-Duty Resistors — Circuit calculations and data on receiving and transmitting resistances for a variety of uses, diagrams for popular power supply circuits, d.c. resistors for battery charging use. Ward Leonard Electric Company. 1 13. Cone Loud Speakers — Technical and practical information on electro-dynamic and permanent magnet type cone loud speakers. The Magnavox Company. 114. Tube Adapters — Concise information concerning simplified methods of including various power tubes in existing receivers. Alden Manufacturing Company. 115. What Set Shall I Build? — Descriptive matter, with illustrations, of fourteen popular receivers for the home constructor. Herbert H. Frost, Incorporated. 116. Using a B Power Unit — A comprehensive booklet detailing the use of a B power unit. Tables of voltages — both B and C — are shown. There is a chapter on troubleshooting. Modern Electric Mfg. Co. 118. Radio Instruments. Circular "J" — A descriptive manual on the use of measuring instruments for every radio circuit requirement. A complete listing of models for transmitters, receivers, set servicing, and power unit control. Weston Electrical Instrument Corporation. 120. The Research Worker — A monthly bulletin of interest to the home constructor. A typical feature article describes the construction of a special audio amplifier — Aerovox Wireless Corporation. 121 . Filter Condensers — Some practical points on the manufacture and use of filter condensers. The difference between inductive and non-inductive condensers. Polymet Mfg. Corp. 1 22. Radio Tubes — Specifications and operating characteristics of vacuum tubes. Twenty-four pages. E. T. Cunningham, Inc. 123. B Supply Devices — Circuit diagrams, characteristics, and list of parts for nationally known power supplyunits. Electrad, Inc. 124. Power Amplifier and B Supply — A booklet giving several circuit arrangements and constructional information and a combined B supply and push-pull audio amplifier, the latter using 21c type tubes. Thordarson Electric Mfg. Co. 125. A. C. Tube Operation — A small but complete booklet describing a method of filament supply for a.c. tubes Thordarson Electric Mfg. Co. 126. Micrometric Resistance — How to use resistances for: Sensitivity control: oscillation control; volume control; regeneration control; tone control; detector plate voltage control: resistance and impedance coupling: loud speaker control, etc. Clarostat Mfg. Co. 127. Vitrohm News — A monthly bulletin dealing with the resistance pioblems of the home constructor and experimenter. Ward Leonard Electric Co. 128. Sangamo Condensers — A helpful table for converting capacities from microfarads to micromicrofarads. Sangamo Electric Co. 129. Tone — Some model audio hook-ups, with an explanation of the proper use of transformers and chokes. Sangamo Electric Co. 130. Screen-Grid Audio Amplification — Diagrams and constructional details for remodeling old audio amplifiers for operation with screen-grid tubes. Thordarson Electric Mfg. Co. 131. The Mershon Condenser — Two illustrated booklets giving the theory and uses of the electrolytic condenser. Amrad Corporation. 132. The National Screen Grid Short-Wave Receiver— Constructional and operating data, with diagrams and photographs. James Millen. 133. The National Shield-Grid Five — A circuit diagram with constructional and operating notes on this receiver. James Millen 134. Remler Service Bulletins — A regular service for the professional set builder, giving constructional data, blueprints, and hints on marketing. Gray & Danielson Mfg. Co. 13s. The Radiobuilder — A periodic bulletin giving advance information, constructional and operating data on S-M products. Silver-Marshall, Inc. 136. Silver Marshall Data Sheets — These data sheets cover all problems of construction and operation on Silver-Marshall products. Silver-Marshall, Inc. 139. Power Unit Design — Periodical data sheets on power unit problems, design, and construction. Raytheon Mfg. Co. R 292