. 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 . e voice of the minister and the voices of thechoir are on the same plane, but with the amplifier weobtain a sense of depth and the entire rendition soundsas though it were in a large church. So the amplifier, then, makes for better results, let aloneloudness. Fortunately, an amplifier i
. 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 . e voice of the minister and the voices of thechoir are on the same plane, but with the amplifier weobtain a sense of depth and the entire rendition soundsas though it were in a large church. So the amplifier, then, makes for better results, let aloneloudness. Fortunately, an amplifier is not such an elab-orate piece of mechanism. It consists merely of avacuum tube of the amplifier model, a filament rheostat, atransformer, and the necessary batteries and the vacuum tube detector, it requires a filament 190 RADIO FOR EVERYBODY battery and a high-voltage B battery. When telephonehead sets are to be used, only 45 volts is required for theB battery. In that case two B battery units of 22/4 volts each are connectedin series, and a tap istaken from the connec-tion between the unitsand brought to the de-tector in order that thedetector will not havemore than 22^ volts,while the amplifier willhave the full is well to mentionhere that a variablevoltage battery should. How the radio-frequency amplifier is used with the loopantenna for long distance reception. VC 1—variable con-denser across loop terminals; L. 1 and Li 2—inductance coils;VC 2—variable condenser; FC—fixed condenser; Am—amplifiertube; D—detector tube; T—telephone receivers; B—plate bat-tery; A—filament battery; K 1 and 2—filament rheostat. Notethe extra resistance. RADIO FOR EVERYBODY 191 be used for the detector, since a good detector tube has acritical voltage adjustment for the B battery, and a fixedvoltage battery for the other unit. Some battery manu-facturers are now supplying a combination B battery of45 volts, with part of the battery made variable so
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Keywords: ., bookcentury1900, bookdecade1920, bookidradioforever, bookyear1922
