. 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 . by the tube is not soserious. The filament rheostat may be made, although it willhardly pay when simple rheostats can be purchased forone dollar or less. The rheostat serves to control thefilament current, which must be accurately regulated forsatisfactory results, since the vacuum tube
. 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 . by the tube is not soserious. The filament rheostat may be made, although it willhardly pay when simple rheostats can be purchased forone dollar or less. The rheostat serves to control thefilament current, which must be accurately regulated forsatisfactory results, since the vacuum tube is a delicatepiece of mechanism. The B or plate battery must be purchased. This battery RADIO FOR EVERYBODY 297 comes in a compact block, either in the large or the smallsize. There are two types of B battery, namely, the fixedvoltage and the variable voltage types. The latter is rec-ommended, since it permits of regulating the plate voltageapplied to the vacuum tube, and this is a most importantconsideration with many vacuum tubes. The telephone receivers must be bought, and it is wellto invest in good receivers. If there is anything thattends to make or undo a radio receiving set it is the tele-phone receivers. Inexpensive receivers are certain toprove the most expensive in the long run, because the. Arrangement of dry cells in series-parallel, in order to obtain a steadier voltage and a longer life from the dry battery used with vacuum tubes. owner of such receivers may soon tire of them and askfor something better, only to find that his inexpensivereceivers have no market value and must therefore bejunked. With all the various components constructed and pur-chased, ready for use, they are assembled as shown in ourassembly drawing. To operate the set, the primary switchis placed on the middle switch point and the variable con-denser in the aerial-ground or primary circuit is variedslowly. ^leanwhile, the secondary switch is also placedon the middle switch point, and the sec
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Keywords: ., bookcentury1900, bookdecade1920, bookidradioforever, bookyear1922
