Radio today (Jan-Mar 1939)

AUTO RADIO CONTROLS Simplest of All to Install THE ONLY CONTROL WITH ALL RATIOS SELF-CONTAINED Works Clockwise or Counter Clockwise With Same Dial Absolutely No Back-Lash ^o Cord, Mo Cable, Positive Gear Drive No Mutilating of Instrument Panel 100% Universal in Every Way No Excessive Stock to Carry One Control Fits Them All COMPLETE LINE OF 1934-35-36-37-38 and 1939 Custom Matched Escutcheon Plates with Edge Illuminated Non-Glare Glass Dials. 1939 CHEVROLET SPECIAL To re-install any 1936, 1937 or 1938 DELCO, UNITED MOTORS or CHEVROLET custom-built radio into a 1939 CHEVROLET car, only this plate is necessary UTILIZING ORIGINAL CONTROL. Plate is heavy die casting — exact duplicate of original dummy plate on dash of 1939 CHEVROLET. Makes excellent custom-matched installation. 1939 FORD 1939 CHEVROLET 1939 PONTIAC The season for this business is now at hand. With a reasonably priced STAR Control and STAR Escutcheon Plate, a profitable business can be done. CASH IN ON IT NOW ! Mail this coupon for complete illustrated catalog No. 391. STAR MACHINE MANUFACTURERS. INC. 1373 East Bay Avenue, Bronx, New York, N. Y. Send catalog offered in February RADIO TODAY. Name Address City State. TRADE NOTES -The 1939 Radio Parts Trade Show will be the biggest in its history," reports managing director Ken Hathaivay, "if present booth bookings are any indication." The first two days of the show, June 14, 15, will be open only to jobbers, and manufacturers and their engineers and agents. The last two days, June 16, 17, will be for servicemen. In this way, claims Mr. Hathaway, more specialized attention can be paid to the problems of jobbers and servicemen. Gen, sales man. Charles B. Shapiro reports that west coast sales of Howard Radio Co., Chicago, were better in January than any similar month in the firm's history. For the eastern territory, Howard Briggs reports with equal optimism. The new battery sets with low-drain tubes have sold well, they state, while console set sales are also above par. Says Mr. Shapiro: "The large console field proves that the American public is still very much interested in the purchase of radios as a piece of furniture." Robert Ban; of Electronic Design Corp., discussed problems of sound amplifiers for public address work at a meeting of more than 100 radio dealers held at the Wedemeyer Radio Co., Ann Arbor, Mich. A new Los Angeles airport is being built at Inglewood, Calif., near the plant of the Universal Microphone Co. President James R. Fouch of Universal says that "those in the industry who notify our factory in advance will be met at the airport and taken through our plant." RCA Mfg. Co. has shifted its district 4 offices to 811 Clark Bldg., Pittsburgh, Pa., effective Jan. 30. James W. Cocke is in charge. Presto Recording Corp. has moved offices and equipment plant to new, uarger quarters at 242 W. 55th St., N. Y. City. Discs will continue to be pressed at the Newark, N. J. plant. The change is due to a rise of 48 per cent in business for 1938. Rockford Chapter of RSA joined the Freeport chapter recently for dinner and a lecture by Leland S. Hicks, Thordarson Electric Mfg. Co., on "Practical Transformer Applications in Servicing Receivers." A television testing laboratory has been launched by the National Union Radio Corp., Newark, N. J., to assist, free of charge, radio set makers in the design and manufacture of their sight receivers. W. M. Perkins and M. G. Nicholson are in charge of the television "proving grounds" which are available to receiver firms desiring to gauge the efficiency of circuits and equipment. All facilities are gratis. Kail* Plug-In Rectifier EVERY ELECTRICAL INSTRUMENT MEASURING A.C. VOLTAGES AT HIGH RESISTANCE SHOULD HAVE IT • Previous Problem: Deactivation of copper oxide rectifiers caused by overloads, caustic gases or humid atmospheric conditions prevalent in every locality at some period of time has heretofore necessitated the complete recalibration of the tester circuit in which the rectifier was incorporated on insertion of a new copper oxide rectifier. In most cases this meant return of the complete tester to the factory, with its attendant delay and expense. • Triplet? s Answer: A plug-in unit incorporating a new copper oxide element precalibrated to a factory standard and thus when plugged into the tester gives you factory calibration. As simple as plugging in a tube. Obtainable through jobber or direct. Rectifier elements are the best obtainable — completely sealed for maximum protection against humidity and caustic gases. The great practicability of this little device has in truth changed the Radio Tester World. ^^f THESE and OTHER MODELS have Plug-In RECTIFIERS MODEL 1601 0E LUXE SET TESTER Complete in Leatherette Case . . . DEALER NET PRICE $49.33. In Metal Case. DEALER NET PRICE $45.33. MODEL 1611 PUSH-BUTTON TUBE-TESTER AND V0LT-0HMMILLIAMMETER Complete in Metal Case . . . DEALER NET PRICE $49.50 SEE YOUR JOBBERWRITE FOR CATALOG! THE TRIPLETT ELECTRICAL INSTRUMENT CO. 192 HARMON AVE., BLUFFTON, OHIO pA£eiiwn* ELECTRICAL INSTRUMENTS 48 Radio Today