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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 237

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 237
the usual method for theamateur is to use a measuring device known as a hot-wireammeter in the aerial circuit, for the purpose of measuringthe aerial current. Approximate results may be obtainedby the use of a low resistance lamp, such as a small auto-mobile lamp or even a pocket flashlamp -bulb.… … Transm ittinojCoupler Simple spark transmitter for producing: I Q sharply tuned waves of the damped variety. | In this case a transmitting coupler or loose- • coupler arrangement is employed, so that the -rz- oscillating or closed circuit is entirely separ-ated from the open or aerial-ground…

Radio

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