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Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art (1922)

Lescarboura, Austin C. (Austin Celestin), 1891- · New York, Scientific American publishing company [etc.] · leaf 132

An illustration from Radio for everybody; being a popular guide to practical radio-phone reception and transmission and to the dot-and-dash reception and transmission of the radio telegraph, for the layman who wants to apply radio for his pleasure and profit without going into the special theories and the intricacies of the art, 1922, leaf 132
vors another form oftuner known as the variometer. The variometer, which is shown in the accompanyingillustration, comprises a fixed set of coils and a movableset of coils. As the knob of the variometer is turned, therelationship between the fixed and the movable coils isaltered. When the… … Ti e A two-slide tuningcoil arranged fortuning the antenna-ground circuit andtlie closed detectorcircuit. 114 RADIO FOR EVERYBODY in which the variometer is placed. When the dial is setat 0, the two sets of coils are so arranged that the currentwill he flowing in opposite directions in both sets of…

Radio

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