. 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 . of one set. This simpHfies theproblem and makes for economy. A soft or gassy tube, known as a detector tube, shouldbe used for the detector, while hard or highly exhaustedtubes should be used for the amplifiers. However, insome sets where a single rheostat may be employed forthe detecto
. 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 . of one set. This simpHfies theproblem and makes for economy. A soft or gassy tube, known as a detector tube, shouldbe used for the detector, while hard or highly exhaustedtubes should be used for the amplifiers. However, insome sets where a single rheostat may be employed forthe detector and amplifier tubes, and a rigid B batteryvoltage is used on all tubes, it is sometimes good practiceto use amplifier tubes throughout, including is not the most efficient practice, but it makes forsimplicity, since amplifier tubes do not require the delicatemanipulation and adjustment that are called for with softor gassy tubes. Of course, the sensitiveness w^hen usingamplifier tubes throughout is bound to be greatly reduced,for it is the delicate adjustment of the gassy tube whichmakes it so highly responsive to weak signals. The Question of Loud Speakers Sooner or later the radio enthusiast wants to do awaywith head phones in order that the radio-phone service 192 RADIO FOR EVERYBODY. may be used for danc-ing or even for enter-taining a roomful ofpersons. In that eventsome form of loud-speaker must be simplest formof loud-speaker is onewhich makes use ofthe existing receivers,without extensive al-terations of the re-ceiving and amplify-ing are horns avail-able which may befitted to the regulartelephone head horns are pro-vided with soft rub-ber pieces or evenwith clamps, so that the regular head set may be held inplace while the sounds from both receivers travel upthrough a horn and are amplified so as to be audible somedistance away. These devices are excellent in a limitedway, and their main attraction is the fact that
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Keywords: ., bookcentury1900, bookdecade1920, bookidradioforever, bookyear1922
