Broadcasting (Oct 1931-Dec 1932)

WHEN YOU MEASURE COVERAGE ♦ . . don't forget percentage modulation ■ Field-intensity data are basic in determining coverage, but they aren't the whole story by any means. Percentage modulation is just as important a factor in pumping more power through your listeners' loud-speakers. m Consider that an increase in percentage modulation from 50% to 100% will increase the loudspeaker power by four times. Yet the field intensity of the carrier remains the same. That is why the Federal Radio Commission demands that you modulate at high percentage. m But remember that unless you exercise extreme care your high-percentage modulation will be accompanied by serious distortion. Even in properly designed transmitters a wrong value of grid bias, for example, may cause trouble. m You can check on the performance of your transmitter at high-percentage modulation by means of a General Radio modulation meter. It not only measures accurately your percentage modulation, but it shows up distortion due to asymmetrical modulation of the car rier. The General Radio modulation meter is coupled to the transmitter-output circuit, its operation is in no way influenced by transmitter changes. Let us tell you more about the General Ra~ dio modulation meter. Write us for literature. OTHER INSTRUMENTS By General Radio Frequency Monitor Volume Indicator Volume Controls Audio Transformers Distortion Meter Piezo-Electric Quartz Crystals DID DfJ Al"il> 'JJJij'JiiSJJAJiSl.SJ J CAMBRIDGE A, MASSACHUSETTS WRAK Is Willing To Share Channel DISMISSAL of the appeal of WRAK, Williamsport, Pa., from the Radio Commission's decision granting the Williamsport SunGazette one-half time on the 1370 kc. local channel occupied full time by WRAK, was requested of the Court of Appeals of the District of Columbia July 22 by Clarence R. Cummins, owner of the station. Request also was made for dissolution of the stay order issued by the court. Mr. Cummins explained he is now willing to share the wave with the newspaper. Pursuant to the action, the Commission allowed WRAK to use full time on the channel until the newspaper station is prepared to go on the air. The case, which provoked considerable discussion when it was before the Commission several months ago, led to an attempt by Mr. Cummins to establish a newspaper to compete with the SunGazette. It is assumed here that Mr. Cummins and his newspaper rival have come to an amicable agreement. An appeal from the Commission's decision of July 1, involving revocation of the license of Homer F. Bryant, operating KGMP, Elk City, Okla., was filed by D. R. Wallace, of that city, on the ground that the action materially affected his legal rights. Wallace had operated the station since March, 1932, but the Commission held he did so in violation of the law and therefore denied transfer of the KGMP license to him. Radio Music Critic TWO PAGES devoted to a critica review of radio music appeared a a new department of Musical Di gest in the June-July issue unde the title of "Good Music on th Air." The column is conducted b; Pierre Key, noted musical critic. Hits Political Pressure (Continued from page 22) kc. channel by WPG, Atlantic Cit> and WLWL, New York, broughj about by the recent agreemenjj with Canada. f "Our good friends of the nortl, numbering in population about th same as California or New Yor City, already had three times a many wave-lengths per capita a have citizens of the United States, he pointed out, "but the latest ad; justment dictated by the State De partment grants them four time the radio service per capita, be sides ruining two American deal channels in the bargain." Concluding with a speculation a to what clear channels will fa next, Mr. Caldwell laments thjjj "few can be found to raise thei voices in protest. Unhappily thos informed seem too busy or coi cerned with their own individuij situations to protect the gener; > commonwealth of radio. And tr majority of the Radio Commin sion, continuously pounded by p< litical pressure, finds that thei must grant concessions to propeii ly accoutred applicants while radij principles and the rights of fan; and rural listeners go into the di: i card." THE COUNTRY IS SAVED AGAIN Kansas has just harvested another great wheat crop — we can eat • Both the Democrats and Republicans have nominated sure-fire winners— all is well • And regardless of how the election goes, Kansans will continue to have money to spend for what they hear about and want. KFH WICHITA KANSAS The quickest, most effective way to reach this great audience is via KFH • The cost ? Only $.0014 per family (one time rate) in our primary area • KFH service includes merchandising, sales surveys and enthusiastic support to your campaign. CHICAGO REPRESENTATIVE WILLIAM G. RAMBEAU, 360 N. Michigan Ave. Page 24 BROADCASTING • August 1, 193