100-Radio-Hookups-EICO-1924

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leo RADIO HOOK-UPSSUPER -REGENERATIVE CIRCUITSFir. 75 Fig. 75Fig. 75. A simple single tube super -regenerativeploying a leapreceiveraerial,emavariable condenser and a variocounler fortuning. The rotor of the variocoupler is used as a tickler coil.It should be rewound with from 80 to Se turns of wire.Fig. 76. A simple form of one tube super -regenerative receiver.All of the tuning is accomplished by the variableacrosscondenserthe loop, while regeneration is produced by a variometer.The last mentioned can be of any standard make.'To óerlalor groundCrisVariometerF. -T, laud speok1er. .y,a,Ofiir(GroundOptional)O.L.1250 sr 1500KC coil45 to 150v.$"Fig. 77Fig. 77-AFig. 77. This, the Autoplex circuit, is a simplified form ofsuper -regenerator. Under proper guidance it proves a good longdistancereceiver and usually provides enough energy for loudspeaker operation. The vernier variable condenser C is not a necessity,but helps to boost the wavelength range of the set andeliminate circuit noises.Fig. 77-A. This shows how a one -stage audio frequency amplifieris added to the Autoplex circuit. The "B" battery is commonto both tubes.40
100 RADIO HOOK-UPS.-:90J5j40Qf-DL /SAPi WO.lrl 10.0e2'L e-F7s. 781E7O, Es<3J-f101}lió1lote /so es'Fig. 78. The same hock -ºp as that of Fig. 76 with the additionof a one stage amplifier. ; By using a .001 M.F. fixed condenseracross the large Honeycomb coils, the variation frequency(which is always evident while receiving) is raised to a very highpitch. The audio frequency amplifying transformer fs.ills toamplify it much due to its inefficiency at high frequencies. It istherefore not bothersome. This circuit should only be used witha loud speaker as the volume is tee great for a pair of headphonesto handle.¿SO V'B'Ms. 79Fig. 79. This is the original Armstrong three tube caper.regenerative receiver, tte first tube being the regenerator and detector, the second tube the oscillator and the third an audio frequencyamplifier. The tickler coil T is the rotor of a variocauplerrewound with 80 to 90 turns. A filter system consisting of resistances,condensers and a choke coil are introduced so that thevariation frequency is choked back and kept out of the amplifiercircuit.41
Page 1 and 2: 1THE EXPERIMENTERS LIBRARY, No. ilo
Page 3 and 4: THE EXPERIMENTER'S LIBRARY, No.100
Page 5 and 6: FOREWORDBEFORE entering upon the st
Page 7 and 8: 100 RADIO HOOK-UPSThe detectors to
Page 9 and 10: 1100 RADIO HOOK-UPSSYMBOLS USED IN
Page 11 and 12: 100 RADIO HOOK-UPScircuit can be tr
Page 13 and 14: 100 RADIO HOOK-UPSbefore he can rea
Page 15 and 16: 100 RADIO HOOK-UPShouse WD -11. The
Page 17 and 18: 100 RADIO HOOK-UPSFig. 6. Honeycomb
Page 19 and 20: -100 RADIO HOOK-UPSt'Jrxyriet Méb
Page 21 and 22: 100 RADIO 11O0H-UP8"T'Fig. 26Fig. 2
Page 23 and 24: 100 RADIO HOOK-UPS01504017Lb07Fit.
Page 25 and 26: 100 RADIO HOOK-UPS.00i lmegohmChore
Page 27 and 28: i!e RADIO HOAX -13143AUDIO FREQUENC
Page 29 and 30: 100 RADIO ROOK -UPSA..`%M7S .f4,Mf.
Page 31 and 32: 100 RADIO HOOK-UPSrm. 53Fig. 53. Th
Page 33 and 34: 100 RADIO HOOK-UPSR.f7.R.fxPv/rn/iA
Page 35 and 36: 100 RADIO HOOK-UPSFig. 61Fig. 61. A
Page 37 and 38: 193 11ADIO HOOK-UPSFig. 65. Here is
Page 39 and 40: 140 RADIO HOOK-UPSREFLEX CIRCUITSFi
Page 41: á_100 RADIO HOOK-UPS,401iloopTOLlm
Page 45 and 46: 100 RADIO HOOK -U PS1MDJ MF.ri....c
Page 47 and 48: 100 RADIO HOOK-UPSFig. 88. Another
Page 49 and 50: 100 RADIO HOOK-UPSFig. 95. A combin
Page 51 and 52: "The Radio Constructor Series"The C

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