Washington County News | 1927-07-28 | Page 3 | Effects of Magnets on Volume of Radio

Effects of Magnets on Volume of Radio During the Brst few years of broadcasting, broad-casting, when regenerative receivers were the most common type, the use of permanent magnets for increasing the sensitivity of the detector tube practically dropped out of sight. The advent of multiple-tube, nonregenera-tive nonregenera-tive receivers brings back the possibility possi-bility of reviving this old stunt to advantage. ad-vantage. Experiments along this line are very simple, for it is only necessary to obtain ob-tain a magnet with space enough between be-tween tlie poles to allow the tube to go between, and explore around the tube with it. There is no fixed rule as to where tlie magnet should be placed, nor is one necessary, for if it is. going to effect an improvement, it will be apparent when the magnet is held in the hand. When the approximate position of the magnet giving increased volume is found, some sort of support may be arranged which will allow for critical adjustment of its position. The magnet mag-net position vviil depend to a degree on the strength of its field. It should be quite strong. Magnets from old boat or motorcycle motor-cycle magnetos are just the thing for this experiment, but those from flivver fliv-ver magnetos, or even straight bar magnets may be found effettive. The larger ones may be found rather awkward awk-ward to use, so, if possible, the use of small ones is recommended. The efficiency of this magnetic action ac-tion is not to be taken for granted. In some cases, signals which are hardly audible are increased to speaker volume vol-ume after the magnets are applied, while in other cases the volume is decreased de-creased or unaffected. In regenerative regenera-tive sets, the stunt is hardly worth trying as the only action will probably be a "spilling ovef" and distortion.