. The Bell System technical journal . y required for suchsystems, and a power of 50 watts has to be transmitted through themthereby introducing special problems in the design of the coils andcondensers. Iigs. 10 and 11 are fnmt ami l>ack \iews of one of thesefilters. One of the featines in the use of these lillers is the I thatthe position of the filters in the circuit is changed from time to time TELEPHONY ON HIGH LINUS IM 1)\- tin. ()|Mrati()ii of the \ slmwiinii l-ii;. II, is to \-, wlu-nthe transmitting circuit is oporatini^ at a fri.(i
. The Bell System technical journal . y required for suchsystems, and a power of 50 watts has to be transmitted through themthereby introducing special problems in the design of the coils andcondensers. Iigs. 10 and 11 are fnmt ami l>ack \iews of one of thesefilters. One of the featines in the use of these lillers is the I thatthe position of the filters in the circuit is changed from time to time TELEPHONY ON HIGH LINUS IM 1)\- tin. ()|Mrati()ii of the \ slmwiinii l-ii;. II, is to \-, wlu-nthe transmitting circuit is oporatini^ at a fri.(incnc\- lower than 80 low pass filter is connected to it and when the transnuttinj; circuitis operating at a frequenc\- higher 1(H) the high pass filterimist l)e connecleil to it. SVSTKM • Signaling or rinj^in.;; is acconiplisiuMl at tlie Iransniitling end l)ychanging the fre(|uenc>- of the oscillator frttiu a fre(|uenc\- helow 80 a fre(iuency ahove 100 without changing the fiUors. This is. Fig. 10—Front \ie\v of Low Pass Filter with Cover Removed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
