Radio doings (Dec 1930-Jun1932)

March, 1931 RADIO DOINGS Page Forty-three New Products Webster Power Amplifiers The Webster Electric Company of Racine, Wisconsin, is offering a complete line of high quality amplifiers for all purposes and of a wide range of power. Phonograph, radio or microphone amplification to any desired volume with uniform excellence of tonal fidelity is provided in a wide assortment of units to meet every possible requirement. The illustration is of one of the larger rack mounted public address or theatre units. Mr. Perry Demerest is standing beside the rack and a speaker unit to illustrate the relative size of the equipment. This particular unit is installed in the new sound studio on one of the upper floors of the Radio Supply Company's building at 912-914 South Broadway, Los Angeles. This specially constructed studio has been arranged for the demonstration of sound equipment of this nature, and the line of Webster amplifiers are in operation there. Webster Electric Company Power Amplifier for microphone, phonograph or radio amplification A feature of the rack type of equipment is that it provides flexibility permitting changes or additions at any time. The power output may be increased by simply adding another unit to the rack, and thus the danger of the installation becoming obsolete is avoided. Anyone interested in sound amplification for any purpose would do well to visit this studio and inspect the Webster equipment. Tiffany-Tone Super Herbert H. Horn Radio Manufacturing Company, Los Angeles, is now in production on the new Tiffany-Tone Midget Super-Heterodyne. An eight-tube receiver, having a sensitivity of but a small fraction of one micro-volt per meter for normal test output. Push-pull audio amplification and Magnavox dynamic speaker provide a great undistorted volume. In a recent test, 117 stations were logged in one night, including three in Australia, one in New Zealand and six in Japan. Adjacent channels to the powerful locals can be played with ease, according to those who have witnessed the tests. Supreme Test Equipment The Supreme Instrument Company is offering a new tube tester wherein the mutual conductance reads directly on the scale of a meter. It will test every type of tube quickly and thoroughly without necessitating any figuring. All readings are di Another item of the Supreme line is the compact Ohmeter and Capacity-meter. This combination is invaluable to the service man and experimenter. It reads directly in ohms and micro-farads and thus affords a very quick check of the values of resistors and condensers. Their standard test kit, also illustrated, is another instrument which is outstanding for the reason that the five meters afford instantaneous readings of all of the vital values without pressing buttons or turning switches to make one or two meters read in all of the circuits. For example, when a 224 type of tube is transferred from the set to the tester, the meters indicate the heater voltage, plate voltage, screen grid voltage, control grid voltage and plate current, all simultaneously. Listenwalter and Gough of Los Angeles distribute the Supreme line of test equipment. Combined Ohmeter and Capacity -Meter The new 48-story building of the Radio Corporation of America in New York, with a sign on it which can be read a mile away, and located at the southwest corner of 51st street and Lexington avenue, emphasizes the fact that that portion of the city will soon be the radio center of the country. This building, which will be ready for occupancy in April, is only a couple of blocks from the Columbia Broadcasting System building at 52nd street and Madison avenue, and not a great distance from the headquarters of the National Broadcasting Company at 55th street and Fifth avenue. Handicapped by a voice which is a little too husky for the radio, Mary Pickford made another creditable appearance the other night. Speaking in behalf of a California concern, she presented five carloads of oranges to the drought sufferers in Arkansas and Oklahoma. However, as seemingly does most every other picture star who gets on the air, Miss Pickford detracted considerably from the presentation by injecting what seemed to be an excessive amount of advertising into the program.