Indianapolis Times, Volume 41, Number 97, Indianapolis, Marion County, 2 September 1929 — Page 28

PAGE 28

BOOKLET ISSUED BY ASSOCIATION FOR RADIO FANS Manual Diagnoses Causes of Most Annoying Interferences. Now that Indianapolis radio fans have been educated to the tact that radio Interference 1* something that can be eliminated, through the service of The Times radio interfer>nce department, they will probably welcome a booklet recently put out by the Radio Manufacturers’ Association. The manual. Issued after a complete survey of reception conditions in all parts of the country, lists over seventy electrical appliances which have been found to cause serious disturbances in radio sets. Reading the manual will enable mo6t interference sufferers to diagnose their own trouble immediately. This “man-made static”—which is simply waste electricity generated by some electrical appliance and discharged into the surrounding ether has caused more annoyance to radio listeners than all the sour soprano;: put together.

Radio Usually O. K. Novices in radio—those who have just bought receivers—may think there is something wrong with their seta when they first hear some of the startling sounds that can emanate from the speaker as the result of some nearby faulty appliance. "It is natural that the radio listener," quoting from the manual, ‘ should attribute to the radio set or some accessory all sounds emitted from the loud speaker other than those apparently intended for entertainment. This opinion is not generally correct, since a radio set properly designed and properly installed is free from such noises.” General Interference may be classified in the two following divisions: Class I—lnterference caused by atmospheric disturbances and conditions considered beyond mans control. Class 2—lnterference caused by electrical and mechanical devices controlled by man. It is the opinion that Class 1 Interference is not controllable and can not be eliminated successfully, although, under some circumstances, it can be reduced in intensity.

Innumerable Causes ©lass 2 Interference can be eliminated or reduced in all cases, providing the source and cause is correctly determined. Class 2 interference, which is considered controllable, may be divided Into the following groups: GROUP 1 Power Circuits (> Lines. <b> Insulators. (e) Lightning arresters, id) Transformers. and motors. GROUP 2 Industrial AppUeatlons ia) Arc light circuits. ib) Telephone and telegraph lines, irt Pole changers and converters. id) Street ears and electric railroads. iei Smoke and dust precipitors. if) Motors. <g) Sign flashers. . GROUP * Household Appliance# (' Hectrie pads or an? similar thermostat controlled devices. b> Violet ray machines or any high frequency apparatus. (c> Flat Irons or any type of resistance heaters. id) Door bells, light switches and motors such as used on vacuum cleaners, washing machines, electric fans, etc. GROUP 4 Miscellaneous fa) X-Rav machines. U>> Storage batten’ chargers. •el Annunciator systems, id) Stock tickers. let Ignition systems. tfi Electric elevators. fg> Electric furnaces. in) Moving picture equipment. ill High voltage test equipment. A further and more elaborate

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group of "interference” makers is given below: Arc lights, electric heaters, electric irons, electric heating pads, automatic railway signals, electric curling irons, marcelling outfits, soldering irons, waSle irons, shaving mug heaters, percolators, vibrating rectifiers, flash signs, elevator controls, leaky cables, bad connections in lighting system, small motors, violet ray machines, X-Ray machines, electric vibrators, electric meters, doorbells and buzzers, annunciators, dough mixers, soda mixers, electric typewriters, electric addressing machines, electric computators. farm lighting systems, corroded or loose connections in radio set. printing presses, dust precipitors. hair automatic towels, oil burning devices, electric refrigerators. vacuum cleaners, motor brushes, starting commutators, telephone dials, telephone nagnetos, electric cigar lighters, street car switches, breaks in third rails, leaky transformer fuses, defective light sockets, dishwashers. Copies may be obtained from the Radio Manufacturers’ Association, Inc., 32 West Randolph street, Chicago, 111. The price Is 25 cents.

DEPARTMENT IS ONE TEAR OLD Smith-Hassler-Sturm Say Prospects Are Bright. Robert F. Sturm of the Smith-Hassler-Sturm Company, local j sporting goods dealers at 219 Massa- | chusetts avenue, reports that their ' radio department, which is one year old this month, now carries a coxnplete line of Majestic, Philco, Fada and Atwanter Kent receivers. James McCoy, manager of the department, is an experienced radio man and features exceptional service to customers at all times. Sturm says that the outlook for the coming fall and winter is very promising due to the fact that a great many people will trade in their j old battery sets for the more new : and modem A. C. power operated i models. Prospective purchasers of | radio will be given personal atten- ! tion by McCoy in both service and j home demonstrations. All radio | sets are sold on a liberal payment ! plan with a personal guarantee to i every customer.

RADIO IN OPTIMISTIC PERIOD, SAYS MAKER Tour of Country Reveals Wide Demand for Sets. The radio industry is in its most optimistic period since the first tinkerer's radio set was constructed years ago, in the opinion of J. M. Skinner, vice-president and general manager of the Philadelphia Storage Battery Company, makers

Modem Smartness in This Handsome Cabinet Model! P MODEL 42-S SCREEN GRID , $l4O Everything you could want in radio at a price that’s truly amazing. The CROSLEY 42-S utilizes THREE 224 Screen Grid R. F. Tubes, one 227 power detector tube, a 227 first audio tube resistance coupled, two 245 output tubes pushpull, and a 280 rectifier tube, 8 in all. Has built-in Type J Dynacoil, a moving coil loud speaker. The cabinet is a beautiful walnut veneer.

MODEL 42 $125 Without Tubes Eight tubes, including rectifier. Mershon condenser. Full A. C. operation. Same cabinet as Model 42-S. Equipped with Dynacoil Speaker. Unbelievable power, selectivity, sensitivity and richness of tone. MODE!. 32 H|j|^|j $99.50 ji; j] Never before so much for the money in console radio. Exquisite design—compact, beautifully proportioned, finished in two-tone walnut veneer. And only $99.50. Certainly no other radio offers as much. Full A. C. operation. Genuine Neutrodyne circuit; Mershon condenser. Three stages of radio frequency amplification. Has a marvelously full, rich, deep tone.

GUARANTEE /bn TIRE AND RUBBER GQ mM) 211S. Illinois St 5606 E. Washington St 938 Virginia Ave. 4147 College Ave. 2118 W. Washington St 3012 Northwestern Ave. MARION RICHMOND ANDERSON MUNCIE

THE INDIANAPOLIS TIMES

of the Philco balanced-unit radio sets. “When I say that radio is in the soundest period in its history,” said Skinner, when seen at the factory recently. "I base my opinion on the results of a nation-wide tour made by three Philco representatives in every large center in the United States and Canada. These three men, Sayre M. Ramsdell, sales promotion manager: Harry Boyd Brown, manager of direct sales, and Robert F. Herr, service engineer, declare that there never has been in

State Fair

radio history such a demand for sets of the type of the present balancedunit radio.” GREETING COMMITTEE IS NAMED FOR SHOW Nine members of the Radio Manufacturers Association have just been appointed by President H. B. Richmond, Cambridge, Mass., to act as the official RMA reception committee during the radio world’s fair at Madison Square Garden, New York

HERE IS WHY YOU SHOULD BUY YOUR CROSLEY FROM GUARANTEE 1. Because—Guarantee is an old established name, known everywhere for their golden rule of doing business. 2. Because—We employ only experienced radio men, assuring you that everything said and done is backed with knowledge and a thorough understanding of every radio problem. 3. Because—We sell CROSLEY RADIO RECEIVERS at the very lowest prices. 4. Because—We stand squarely behind the merchandise we sell and hundreds of Crosley owners are proof of our ability to please. 5. Because—Our famous guarantee of Satisfaction or Money Back applies to every sale of Crosley Radios.

DEFERRED PAYMENTS We have a deferred payment plan that is easy and convenient. Ask about this easy method of owning a CROSLEY. ■. Arrange Now for DEMONSTRATION Call at any Guarantee Store for demonstration without obligation on your part.

City, Sept. 23 to 28, and the Chicago radio show, coliseum, Oct. 21 to 27. The greeters are C. C. Colby, Samson Electric Company, Canton, Mass.; Verne W. Collamore. Atwater Kent Manuafacturing Company, Philadelphia: H. B. Forster, Utah Radio Products Company, Chicago: Major Herbert H. Frost, Kolster Radio Corporation. New York City; Jess Hawley, United Reproducers Corporation, Chicago; Morris Mncalf, American Bosch Magneto Corporation, Springfield, Mass.; J. L. Ray, Radio Corporation of America, New York City; William Sparks,

Sparks-Withington Company. Jackson, Mich.; T. K. Webster, The Ekko Company, Chicago. Hawley also is chairman of the RMA show committee, and Colby and Major Frost are former association presidents. Goes to Austria Joseph Knecht. leader of the Stlvertown Cord orchestra, the first radio group to make a tour of personal appearances—is now in Austria visiting his parents at their Vienna home

MODEL 3X.^;.555 Without Tubes Here is radio's supreme value. A handsome table model or with the addition of legs, a slender, graceful console. And only $55 (legs $5 extra. Type E Model 226 Dynacone speaker $lB extra). The legs are easily attached and are very rigid. With the speaker attached underneath the set becomes an end table and radio! All metal. Seven tubes including rectifier. Full neutrodyne circuit— Mershon condenser. Full A. C. operation, MODEL 41.;;;. S7O Without Tubes Cabinet same as Model 31 except that it Is larger. Eight tubes—including two power tubes and rectifier. Full A. C. operation. Completely shielded. Neutralized under the Hazeltime patents. Legs, $5 extra. Crosley Dynacone speaker, $lB extra. MODEL 41-5...585 Without Tubes SCREEN GRID Same cabinet as Model 41. Utilizes THREE 222 Screen Grid R. F. tubes, one 227 power detector tube, a 227 first audio tube resistance coupled, two 245 output tubes push-pull, and a 280 rectifier tube, 8 in all. Completely shielded gang condenser, with illuminated dial and cable drive. Operates Dynacoil Speaker. Legs, $5 extra. Dynacoil Speaker, S2B extra.

.SEPT, 2 y

ADMIRERS SEND GIFT OF FRENCH BON BONS Listeners in Devonshire, England, Surprise Milton Cross. The latest, gift to Milton Cross, NBC announcer, from his followers beyond the microphone deserves mention. ’lt was received from Devonshire, England—a Chinese lacquer box filled with French bon bons.