Show simple selector coil stops harmful radiation A simple selector coll coil to stop harmful amount of radiation front regenerative receiving sets Is shown by figure 1 it Is made by winding two separate colls coils on a tube 21 2 k inches in diameter by 3 inches long with no 22 D C 0 wire two fixed mica corf coif 24 4 1 1 A 1 14 AT Q cal mcd capacity are used for coupling to regular aerial and ground posts of set the aerial and ground are arc connected to the small email colt coll while tho the larger coll coil goes goei to the receiving set via the condensers tuning Is as usual but the amount of radiation Is reduced to such an extent as not to interfere seriously with neighbors |