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Can "Static" Interference Be Eliminated?
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, curl to a simple "wave" in the hair. In any case the receiving set would have to be designed not to receive the ordinary type of wave at all. While the signal-to-static ratio might very likely be improved by the use of these particular types of waves, it is extremely unlikely that complete freedom from static would be attained.
UNDERGROUND TRANSMISSION
UNDER the general head of "avoiding battle" comes the idea of transmitting from one antenna entirely buried under the earth to another similarly buried. Transmission free from static has been reported by some experimenters using this method. The writer does not feel prepared to criticize the possibilities of this method, and only ventures to wonder whether the phenomenon of "total reflection" could play any part in it.
Summing up the whole subject, we do not
see much hope of eliminating static absolutely, but believe it to be readily possible to reduce the interference to any desired degree by the use of the methods (no two of which are mutually exclusive) tabulated below in order of practicability and importance:
1. Increase power of all transmitting stations.
2. Increase frequency selectivity of receivers to the limit imposed by quality considerations.
3. Work in region of wavelengths that experiment shall have shown to be freest from interference.
4. Increase directional selectivity of receiving antennae.
5. Decrease necessary channel width by use of single side band transmission.
6. Use some type of electro-magnetic wave that is less used by Nature than the type now used for broadcasting.
LIEUTENANT LOWELL SMITH Acting Commander of the United States Army World fliers, who recently completed their 'round the world flight. Lieutenant Smith is describing his experiences before the microphone at station wcco, St. PaulMinneapolis, wcco was formerly known as WLAG. At several cities, notably at Boston and New York, when the fliers arrived, greetings and speeches were broadcast to them in the air, and the answers picked up by the microphones of a broadcasting station on the ground and rebroadcast to radio listeners