. 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 . r of tele-phone receivers or the loud-speaking device, as the casemay be. A third step may be added in the same steps or stages of amplification are considered thelimit in actual practice, for the reason that beyond thatpoint tlxe adjustment of the circuits becomes too diff
. 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 . r of tele-phone receivers or the loud-speaking device, as the casemay be. A third step may be added in the same steps or stages of amplification are considered thelimit in actual practice, for the reason that beyond thatpoint tlxe adjustment of the circuits becomes too difficultfor satisfactory work. Please note that the same fila-ment and B battery may be used for the detector and theamplifier tubes, but for the sake of simplicity most of ourdiagrams show separate batteries being used for eachtube. Whereas the amplifier tubes and detector tubes maylook alike, they are quite different as far as the electricalcharacteristics are concerned. Amplifier tubes are notcritical in adjustment when compared with detector tubesand they will operate successfully on plate voltages of 40to 80 volts. Where a detector and two stages of ampli-fication are used, three 22^ volt units may be connected 182 RADIO FOR EVERYBODY ■(ENT iNTdRVA^vt T»!«F RS TlBt Simple mounting for a two-stage amplifier, comprising the fila-ment rheostats, the intervalve or amplifying transformers, andthe tube sockets. in series and connections to the receiver made in a mannerwhich permits the use of the full voltage on the amplifiertubes while a variable portion of the same battery isused for the detector tube, say anywhere from 16 to 22volts. Where extremely loud signals are desired theplate voltage may be 100 or over; and while such highvoltage will not damage the amplifier, it will increasetube noises, and is therefore not desirable when receivingsignals with the telephone head set. No more than 45volts is required even with several pairs Of head ampl
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Keywords: ., bookcentury1900, bookdecade1920, bookidradioforever, bookyear1922
