Show forefathers forefather S OF RADIO by GEORGE LEWIS of the crunley croley ilailo corporation corpora hon while it i student in the postgraduate school of columbia university new york city edwin armstrong become became interested in the development of receiving circuits for using the radio tube right rind and nine tube sets seta were coming into vogue arid and it began to ap edwin H armstrong pear that mot soon the owner of n radio set would have to remodel hta his home in order to get it into one room armstrong invented a system whereby a single tube Is used both as a detector and an amplifier colls coils being arranged so BO that after the signal current has 2 2 aso A OUT 0 BA B A Is UC ME TUDIS gone t brough the detector tube once it Is in effect sent back through that tube several times to be fu further titter arn fled the result Is that one detector tube used in this way li Is equivalent to a detector tube sud and two or more amp amplifier nm pliner lifler tubes used asod in the old wily way ile ho called this system regeneration regenerative sets became popular very rap rapidly tIly since a regenerative set operates its s as tiny any other type of set using several more tubes they are arc still the most eft efficient lelent type of set today in fact regeneration Is tile lie technical principle which has made it possible to manufacture tit tha best of radio sets within the reach of tile tho average mans pocketbook |