. QST . page 17) more capacitor than the circuit of Fig. 2A, andit will usually work well with crystals of eitherthe overtone or fundamental variety inter-changeably. Weve used it repeatedly for 3rd-overtone work with crj^stals in the 6- to , and have had no trouble getting 5th-over-tone oscillation with crystals. In some applications it may be desirable tohave the crystal oscillator as high in frequencyas possible. This is particularly true of crystal-controlled converters, where energy at fre-quencies other than the desired one may causebirdies and spurious responses. For c
. QST . page 17) more capacitor than the circuit of Fig. 2A, andit will usually work well with crystals of eitherthe overtone or fundamental variety inter-changeably. Weve used it repeatedly for 3rd-overtone work with crj^stals in the 6- to , and have had no trouble getting 5th-over-tone oscillation with crystals. In some applications it may be desirable tohave the crystal oscillator as high in frequencyas possible. This is particularly true of crystal-controlled converters, where energy at fre-quencies other than the desired one may causebirdies and spurious responses. For converter usethe circuit of Fig. 2C may have merit. This wassuggested to the writer by Clare Reynolds,W9MBI, of the James Knights Crystal Co.,Sandwich, 111. He uses it in converters, andhas also had direct control of an oscillator at 144Mc. m a low-powered 2-meter transmitter. He(Continued on page 1S2) 120 Oont ief exeHed, Mi / ptohihltj mnd the imm\mtmon^. Ifs the jmp doofjhats supposed fo ^o up.*. The trend is up-Up-UP on trade-ins at Walter Ashe. Surprise allow-ances were never better than now on used (factory-built) test and com-munication equipment. That means far lower prices for you on the newequipment of your choice. So get your trade-in deal working , write, phone or use the handy coupon below. AMATEUR GEAR BARKER & WILLIAMSONTRANSMITTER JOHNSON VIKING RANGERTRANSMITTER-EXCITER KIT Model $ SINGLE SIDEBAND EXCITER. Model 51SB. Net $
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
