OCR Text |
Show Educating New Owners of Radio-Receiving Sets In the selection of a radio set many features must be considered. There are many trick contrivances on the market, hut, basically, the modern receiver is constructed in two general classes that is, it uses two fundamental funda-mental circuits the tuned radio-frequency, with detector and audio amplification, am-plification, and the superheterodyne. The former is designed for employing an outside aerial, the latter for an inside or loop aerial. Before choosing choos-ing either type, take into consideration considera-tion the conditions pertaining to loca tion. Apartment dwellers, as a rule, are not permitted the advantages of an outdoor antenna. Many of them resort to an indoor aerial, running along the picture molding of a room. The wiser ones choose a straight loop, in connection with a superheterodyne super-heterodyne circuit. Most of the standard sets are new built for sensitivity sensi-tivity and selectivity. These words are not mysterious. Sensitivity relates re-lates to the ability of the set to pick up weak signals. Selectivity relates to their separation to avoid receiving more than one station at a time, and also to avoid th clashing of signals from stations whose wave lengths are closely allocated. Both these attrib utes make for quality, but, of course, the general tone of a radio set depends de-pends much on the type of loud, speaker. |