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AUTO ANTENNAS <*
NEW! <
DIFFERENT! PATENTED!
No DRILLING ... NO MARRING OF CAR!
Antennas are m^de of ALL BRASS STAINLESS STEEL, and guaranteed rustproof for the life of the car. Last word in value . . . good looks . . . and easy installation. No drilling. And there are 8 more powerful reasons why you should demand ICA Universal Bracket Cowl Antennas. WRITE FOR 8-PAGE ILLUSTRATED FOLDER now while you think of it.
INSULINE CORP. OF AMERICA
25 PARK PLACE NEW YORK, N. Y.
BOOK REVIEWS
RADIO TROUBLE-SHOOTER'S HANDBOOK
By Alfred A. Ghirardi
The new Ghirardi handbook features 274 pages of receiver case histories for over 3,300 models. The most likely difficulties are listed for numerous symptoms for each model.
Almost 50 pages are devoted to I.F. peaks for practically every known receiver model. And to aid the serviceman in spotting defects, there are trouble-shooting charts for both auto and home sets.
Other sections deal with auto-radio installation, elimination of ignition interference, and wiring diagrams of automotive electrical systems. Resistor charts, color coding, conversion charts, radio formulae, tables, and tube characteristics are handily arranged.
518 pages, SV2 x 11 inches, go to make up the book which is priced at $3. Published by Radio & Technical Pub. Co., New York, N. Y. — Radto Today.
The third edition of "Photoelectric Cell Applications" is now available from Pitman Publishing Corp., 2 W. 45th St., N. Y. City, cost $4. Written by R. C. Walker and T. M. C. Lance, it deals with technical and industrial uses of the cell.
LIGHTWEIGHT COMPACT PORTABLE
THOUSANDS of ONAN ELECTRIC PLANTS are supplying ALTERNATING CURRENT all over the World, for Lighting, Operating All Appliances and Powering RADIO TRANSMITTERS and RECEIVERS for Amateur and Commercial Operators. PORTABLE ONAN PLANTS are Operating Public Address Systems, Sound Truck Apparatus, Moving Picture Projectors, etc. Others are installed in Public and Private Buildings, to provide Electric Service in case of Power Line Failure. Many of these have prevented financial losses and even loss of life in such Emergencies.
ONAN ELECTRIC PLANTS are Dependable, Economical and Long-lived. Types from 350 to 5,000 Watts carried in stock. Models include 110 or 220 Volt, AC— 12, 32 and 110 Volt DC— also Dual Voltage AC-DC Units. Furnished in either Manual, Full Automatic or Self-Starting Types. Shipped READY TO RUN. Prices start at $99.
WRITE FOR DETAILS AND PRICES
D. W. ONAN & SONS
596 Royalston Ave. Minneapolis, Minn.
* MISS JONES
led
is marnea now . . .
She'll tell her husband how 300c! your service has always been and he too will have you do their radio repairs. That's the way business grows. Use dependable Ward Leonard Replacements. They stand up, thus help make satisfied customers. Send for Price List 507.
WARD LEONARD ELECTRIC CO.
40 SOUTH STREET, MOUNT VERNON, N. Y. Please send me Price List 507.
Name
Firm
Address
City State
"DYNAMIC CONDUCTANCE" TUBE TESTER
• Consolidated is proud to offer the new, up-to-theminute Model 9000 "Dynamic Conductance" Tube Tester. Engineered to give top performance. Built to take full advantage of greater accuracy afforded by dynamic mutual conductance circuit. Sells for only $37.50. See your jobber today!
= ASSOCIATED ■ , ^
516 S. PEORIA ST. CHICAGO, ILL.
54
Radio Today