Radio broadcast .. (1922-30)

RADIO BROADCAST ADVERTISER 253 68. CHEMICAL RECTIFIER —Details of assembly, with wiring diagrams, showing how to use a chemical rectifier for charging batteries. CLEVELAND ENGINEERING LABORA- TORIES COMPANY. 69. VACUUM TUBES —A booklet giving the characteris- tics of the various tube types with a short description of where they may be used in the circuit. RADIO CORPORA- TION OF AMERICA. 77. TUBES— A booklet for the beginner who is interested in vacuum tubes. A non-technical consideration of the various elements in the tube as well as their position in the receiver. CLEARTRON VACUUM TUBE COMPANY. 87. TUBE TESTER— A complete description of how to build and how to operate a tube tester. BURTON-ROGERS COMPANY. 91. VACUUM TUBES —A booklet giving the characteristics and uses of various types of tubes. This booklet may be obtained in English, Spanish, or Portuguese. DEFOREST RADIO COMPANY. 02. RESISTORS FOR A. C. OPERATED RECEIVERS —A booklet giving circuit suggestions for building a. c. operated rt'a'ivers, together with a diagram of the circuit used with the new ^oo-millampere rectifier tube. CARTER RADIO COMPANY. 07. HIGH-RESISTANCE VOLTMETERS —A folder giving in- formation on how to use a high-resistance voltmeter, special consideration being given the voltage measurement of socket-power devices. WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY. MISCELLANEOUS 18. LOG SHEET —A list of broadcasting stations with columns for marking down dial settings. U. S. L. RADIO, INCORPORATED. 41. BABY RADIO TRANSMITTER OF QXH-QEK —Descrip- tion and circuit diagrams of dry-cell operated transmitter. BURGESS BATTERY COMPANY. 42. ARCTIC RADIO EQUIPMENT —Description and circuit details of short-wave receiver and transmitter used in Arctic exploration. BURGESS BATTERY COMPANY. 4$. SHORT-WAVE RECEIVER OF gxn-OEK—Complete directions for assembly and operation of the receiver. BURGESS BATTERY COMPANY. 44. ALUMINUM FOR RADIO— A booklet containing much radio information with hook-ups of basic circuits, with inductance-capacity tables and other pertinent data. ALUMINUM COMPANY OF AMERICA. 45. SHIELDING— A discussion of the application of shielding in radio circuits with special data on aluminum shields. ALUMINUM COMPANY OF AMERICA. ^H. How TO SELECT A RECEIVER —A commonsense booklet describing what a radio set is, and what you should expect from it, in language that any one 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. 73. RADIO SIMPLIFIED —A non-technical booklet giving pertinent data on various radio subjects. Of especial in- terest to the beginner and set owner. CROSLEY RADIO COR- PORATION. 74. THE EXPERIMENTER —A monthly publication which Hives technical facts, valuable tables, and peitinent informa- tion on various radio subjects. Interesting to the experi- menter and to the technical radio man. GENERAL RADIO COMPANY. 7=;. FOR THE LiSTENER^General suggestions for the selecting, and the care of radio receivers. VALLEY ELECTRIC COMPANY. 76. RADIO INSTRUMENTS— A description of various meters used in radio and electrical circuits together with a short discussion of their uses. JEWELL ELECTRICAL IN- STRUMENT 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 stor- .1^1- batteries. Of interest to the owner of storage batteries. BURTON ROGERS COMPANY. os. RESISTANCE DATA —Successive bulletins regarding the use of resistors in various parts of the radio circuit. INTERNATIONAL RESISTANCE COMPANY. o(». 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 tin- 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 KHSKARCH ASSOCIATION. 09. RADIO CONVENIENCE OUTLETS —A folder giving diagrams and specifications for installing loud speakers in various locations at some distance from the receiving set. YAXLKY MANUFACTURING COMPANY. RADIO SERVICE SET TESTER This new HOYT instrument makes alt continuity tests on any Radio set and gives instant readings of the filament and plate voltages on any tube, the plate current, and a test of grid connections. It may be used in addition as an accurate tube tester. Equipped with precision, moving coil voltmeter, resistance, 1000 ohms per volt, with knife-edge pointer highly damped, and 3-inch hand calibrated, 3-range scale—O-io and 0-500 volts and 0-25 M. A. Equipped also with external binding posts, and rubber covered leads with prods, for external tests of batteries and B-Eliminators. Dimensions: 9 by 7 by 3} in. Cased in finished hardwood box with cover and leather carrying handle. Price complete with Adaptors $60.00. Send for new Radio Catalog B-8 BURTON-ROGERS COMPANY BOSTON SOLE SELLING AGENTS MASS. RADIO PRODUCTS manufactured under the BRUNO trade mark have been produced by the same man' agement for over five years. The story of BRUNO quality is best told in the results obtained from BRUNO Parts. BRUNO Coils, Brackets, Kits, Uni- tunes, Condensers & Light Switches can be had at your Dealer or direct from us. Our NEW 36 page booklet thoroughly ex- plains our line. Send 25 cents for your copy BRUNO RADIO CORPORATION Long Island City New York KARAS APPARATUS AGAIN SPECIFIED In the 8 0 Meter Trans- mitter described in this is- • of Radio Broadcast 3 Karas Orthometric .0005 mfd. Straight Frequency Line Variable Condensers tare specified. In the Shield- led Neutrodyne Receiver, also F described in this issue, 3 Karas Micrometric Vernier Dials are specified. Be sure to use Karas Con- densers when you build your short wave transmitter. Tht'ir use will add greatly to the satisfaction and en- joyment you will derive from this set. And if you use Karas Dials, with their split-second 1| 1000th of an inch control of tuning, when you build your Shielded Neutrodyne. Receiver, you will be able to bring in hard-to-tune, stations with ease. Karas .0005 Condensers are $7 each, Karas Dials 13.50 each. Order from your dealer to-day. Write for lit- erature regarding the new Karas products. KARAS ELECTRIC CO. 1033-H, N. Rockwell Street Chicago Televocal QUALITY TUBES A RADIO TUBE that is non-microphonic—won't short; tested and balanced Ask your dealer for this new and better radio tube that costs no more. If he can't supply you with TELEVOCALS send us his name and address on attached «• — — — — — —— — — — — •• —I coupon. DEALERS AND JOBBERS WRITE US 1 ! _____________________^_ f Dealer's Name City Slate Your Name Televocal Coiton. Televocal Bldg. 588 Twelfth StWest NewYorfe,N. J.