. QST . zards Bay Cape andIslands Emergency Net meets on Mc. at 1900 is and CMT, UUM, DPO, OH, PMC, GUY,DJK, TYZ, TJW, DUI, AQN, LNR, MYE, ZGO, LYV,YHQ, MFI, QWI, JNI, MNF, NKS, ZSJ, YAN, and MKWare on. KBN and UOZ are members of the College Net. TheNorwood group helped out with mobile rigs when 3Boy Scouts were lost. SIX reports a demonstration ofcommunications at Georgetown with AFJ, WTK, KT,CVG, YYL, and WCI helping out. They used 2-meter radiounits in 5 cars with one in the Central Fire Station. TTYhas a Ranger kit. UKA has a new job. PIW is on PY
. QST . zards Bay Cape andIslands Emergency Net meets on Mc. at 1900 is and CMT, UUM, DPO, OH, PMC, GUY,DJK, TYZ, TJW, DUI, AQN, LNR, MYE, ZGO, LYV,YHQ, MFI, QWI, JNI, MNF, NKS, ZSJ, YAN, and MKWare on. KBN and UOZ are members of the College Net. TheNorwood group helped out with mobile rigs when 3Boy Scouts were lost. SIX reports a demonstration ofcommunications at Georgetown with AFJ, WTK, KT,CVG, YYL, and WCI helping out. They used 2-meter radiounits in 5 cars with one in the Central Fire Station. TTYhas a Ranger kit. UKA has a new job. PIW is on PYM will have high power on 20 meters. QMU plans along wire in Stougliton. SX Dis back at work again. UH hasa new 20-meter beam. LMU is trying low power on 10-15meters. RM has a new mast. Newton members meet on6 meters Sun. nights. EK has a Sonar rig at work. JOW ison 6-meter DGY has his General Class license. GGP hasmoved to Hialeali, Fla. The Winthrop group had the(Continued on page 94) 92. Further discussion of theRobert Dollar Oscillator Lost month we discussed use of the circuit shown in for overtone use; and, as redrawn in Fig. 2, as a basicPierce Oscillofor. (OST, April, 1955). Now, if capacitor C (Fig. 2) is tuned to opproach thethird overtone resonant frequency, a point will be reach-ed where the crystal ceases to oscillate on its funda-mental and begins to oscillate on its overtone fre-quency. At this point a change In the oscillator fre-quency occurs, since the overtone frequency is not aneven multiple of the fundamental. An increase In gridcurrent and output on the third harmonic will be notedas caplcator C is tuned. This some circuit may be usedon even harmonics, however the crystal continues tooscillate on Its fundamental in this case. Thus it canbe seen that the Robert Dollar circuit will oscillateunder a wide variety of conditions and if the tunedcircuit L-C is not properly adjusted, overtone operotlonwill not be realized. With plated overtone
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
