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FolDruary 14, 1931
power of a transmitter. Either the indirect method or field intensity measure¬ ment mc'.y ho used. There arc special forms to he used in gaining Commission con¬ sent to use these methods. After these special forms have been submitted, the Commission must act upon this information and modify the applicant's license accordingly. The direct method is found by taking the square of the antenna current times the antenna resistance at some point whoro current is measured and at the same operating frequency.
The Commission has not adopted any set method of making antenna resistance measurements. Compilations by any standard method will be considered, if a full description of the procedure used is given when the data is submitted to the Commission. This includes a description of the instruments and method used and qualifications of the persons conducting the tests.
MOBS LOCALS PROPOSED
By reducing the present separation of 10 kc to 2 kc, Clarence R, Cummins, owner of station W R A K at Williamsport, would make available 125 frequencies which v/ould be used by the smaller communities throughout the country. This plan was presented to the Commission at a hearing this week which involved a change in assignment of W E D H at Erie,
The plan, as outlined, would provide for 25 out of the existing 96 broad¬ cast channels to be designated for this 2 kilocycle separation and allocated to one block in the spectrum, Mr, Cummins claims that a large number of low power stations are considerably more in the public interest than a few hi^i power sta¬ tions. Adequate service, Mr, Cummins scys, could be given to every community in the country with a population of 100,000 or less. This service would be allotted at the rate of one watt for each thousand of population in a community, but the least power used would be 15 watts.
Engineers are doubtful as to the results of this plan, but Mr. Cummins be¬ lieves that ho can show satisfactory results to the Commission, if he will bo given authority to conduct experiments with 10 stations in Pennsylvania, for which purpose papers are now being prepared for filing with the Commission.
The sun of $6,500,000 is said to be behind this plan.
IS SYRCHROIIIZATIOR A CURE-ALL?
Synchronization, heralded as the cure-all for all broadcasting evils, has arrived. Many stations now consider this new system as a giant that will rise up and crush them with competition. Synchronization is neither a cure-all nor a giant. The real story of synchronization and its practical application is re¬ lated by Dr. C. W. Horn, general engineer of the ITBC, and E. K. Cohan, technical director of CBS, in the Proceedings of the Eighth Annual Convention of the NAB, of which a limited supply of copies are still available. Read carefully what these and other engineers have to say about synchronization under questioning by engineers from all classes of stations. Proceedings are $5,00 per copy until the supply is exhausted. Address NAB headquarters, National Press Building, Washington, D. C,