What is the Efficiency of Your Set?

Radio Record, Volume I, Issue 52, 13 July 1928, Page 4

What is the Efficiency of Your Set?

Interesting Test to be made by 2YA VERY interesting test is to be made by 2X¥A shortly, and the assistance of all listeners is invited. The test relates to the efficiency of receiving sets, The date of the test will be announced in next week’s "Radio Record," and a coupon will be published for listeners to fill in and return. That the cause of much poor reception is entirely in listeners’ own hands is widely known, and it will be a source of satisfaction to listeners to have the receptive qualities of their sets tested. The Broadcasting Company, therefore, propose to make test transmissions in various frequencies, and listeners will be asked to equip themselves with pencil and paper and record what reception they get at these different frequencies, The quality of the set will be shown by the vibrations receivedand not received. $ HE Director of Music of the Radio Broadcasting Company, Mr. W. J Bellingham, will be present when the tests are being carried out. The changes in vibrations will be made during the transmission of a lecture by Mr. Bellingham on the nature and purpose of the tests. He will announce when each change in frequency is made. These tests will take place on two days, and listeners will have an opportunity of judging for themselves as to whether their loudspeakers are capable of responding to the vibrations which are necessary in order to obtain a true tone. The vibration frequencies will range from the lowest fundamental to the highest harmonic. If the listener hears nothing of any particular frequency, he will realise that his set is incapable of accepting this particular frequency, and how the musie which is transmitted is being spoiled. T is realised that bad reception of good music is the reason why there is a demand for rhythmical musie such as jazz. This demand for jazz does not indicate that the listener has not the capacity of appreciating beauty of tone, but that possibly he never hears it from his loudspeaker. If a listener can only hear rhythm, it is only rhythm he will ask for. In the next issue of the "Radio Record" the subject will be more fully discussed, and the necessary information in connection with the tests will be published for the benefit of listeners.