Radio broadcast .. (1922-30)

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RADIO BROADCAST ADVERTISER 55 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. 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- age batteries. Of interest to the owner of storage batteries. BL-RTON ROGERS COMPANY. 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. 105. COILS —Excellent data on a radio-frequency coil with constructional information on six broadcast receivers, two short-wave receivers, and several transmitting circuits. AERO PRODUCTS COMPANY. 106. AUDIO TRANSFORMER —Data on a high-quality audio transformer with circuits for use. Also useful data on detector and amplifier tubes. SANGAMO ELECTRIC COMPANY. 107. VACUUM TUBES —Data on vacuum tubes with facts about each. KEN-RAD 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.. 109. RECEIVER CONSTRUCTION— Constructional data on a six-tube receiver using restricted field coils. BODINE ELECTRIC COMPANY. i io. RECEIVER CONSTRUCTION —Circuit diagram and constructional information for building a five-tube set using restricted field coils. BODINE ELECTRIC COMPANY. in. STORAGE BATTERY CARE— Booklet describing the care and operation of the storage battery in the home. MARKO STORAGE BATTERY COMPANY. 112. 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. resis- tors for battery charging use. WARD LEONARD ELECTRIC COMPANY. 113. CONE LOUD SPEAKERS —Technical and practical in- formation 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. 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. 116. USING A B POWER UNIT —A comprehensiv: book- let detailing the use of a B power unit. Tables of voltages— both B and C—are shown. There is a chapter on trouble- shooting. MODERN ELECTRIC MFG. Co. 117. BEST RESULTS FROM RADIO TUBES —The chapters are entitled: "RadioTubes," "Power Tubes," "Super De- tector Tubes," "A. C. Tubes," "Rectifier Tubes," and "Installation." GOLD SEAL ELECTRICAL Co. 118. RADIO INSTRUMENTS. CIRCULAR "J"—A descriptive manual on the use of measuring instruments for .-very radio circuit requirement. A complete listing of models for trans- mitters, receivers, set servicing, and power unit control. WESTON ELECTRICAL INSTRUMENT CORPORATION. 119. THE NEW IXJFTIN WHITE CIRCUIT —A twenty-four page booklet explaining the principles and application of this popular circuit. CONSOLIDATED RADIO CORPORATION. 120. THE RESEARCH WORKER— A monthly bulletin of in- terest 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 be- tween inductive and non-inductive condensers. Polyment Mfg. Corp. 122. RADIO TUBES— Specifications and operating charac- teristics of vacuum tubes. Twenty-four pages. E. T. CUN- NINGHAM, INC. 123. B SUPPLY DEVICES— Circuit diagrams, characteris- tics, and list of parts for nationally known power supply units. 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 210 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. MicRpMETRic 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. AMERICAN MECHANICAL LABORATORIES. Samson "Pam" Amplifier Type PAM 16 is for all ordinary types of loud speakers, Type PAM 17 is for and supplies field current to dynamic type speakers. Type PAM 16 or 17, List Price $125.00 for 110 Volt, 50-60 Cycle A. C. A COMPACT, self-contained, rugged, all electric, two stage audio amplifier for radio console or table. Designed to meet Underwriters' and A. 1. E. E. standards. Compensation is made for line voltage variation. Approximate undistorted power output 7 watts. Due to the high standard of parts used in its manufacture, the question bf service ends with its installation. Immediate deliveries can be made by your jobber or dealer, or direct from us. With the use of superlatives in radio advertising all too prevalent the best guarantee of excellence in performance is the fact that Samson products have been standard in the quality field since 1882. \amson General Offices: Canton, Mass. Factories, Canton and Watertown, Mass. Manufacturer* since 1882 Complete stocks for the latest kits are always sive Radio house and the largest distributors for following kits and hundreds of other circuits are instant shipment. Silver-Marshall Shielded Grid Six Silver-Marshall Screen Grid Laboratory Super Silver-Marshall Hi-Volt Silver-Marshall Unipacs and Pushpull Amplifiers Rernler Infradyne Remler Best Screen Grid Super World's Record Super Karas A-C Equamatic New Bremer-Tully Power Six 711 WEST LAKE STREET, QUICK SERVICE—PROMPT SHIPMENT You can rely upon us to fill your orders promptly. We have the very latest parts and complete stocks always on hand. You can tie up with us for any- thing in radio that you may need at any time. SEND FOR FREE CATALOG NOW You can have this complete, up-to-the-minute radio Kuide with no obligation to you. It is a com- plete, up-to-the-minute radio reference and a real money-saver. Just mail the coupon and a complete copy will be sent you. CHICAGO, ILLINOIS ALL THE LATEST KITS and PARTS Send for 1928 WHOLESALE DEALERS' CATALOG Greatest Discounts on All Standard Parts, Kits, Accessories and Equipment Dealers, set builders, and agents, send for this catalog. You will find complete parts and equipment for the latest circuits featured in Radio Broadcast and other magazines—and at the lowest prices. LATEST SHIELDED GRID and A. C. CIRCUITS on hand. We are the largest exclu- nationally popular radio parts. The featured in our catalog and ready for New Bremer-Tully Short Wave Latest Browning-Drake Tyrman Amplimax Seven Complete Stock Aero Parts Hammarlund Hi-Q Magnaf ormer A-C Latest Thordarson Pushpull Amplifier Silver-Marshall A-C Laboratory Super THOUSANDS OF RADIO BARGAINS Most complete stock of all parts—A-B Eliminators, Power units and loud speakers. All the latest developments in six, seven, and eight tube sets for A-C and D-C operation. We stock genuine A-C sets, using 226 and 227 A-C tubes. You will be amazed at our wonderful selection of consoles and cabinets. HAMILTON-CARR CORPORATION Hamilton-Carr Corporation 711 W. Lake St., Chicago, III., Dept. 409 Please send at once your Free 1928 Wholesale Dealers' Catalog. Name... Address. City . State.