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Show SUPER-REGENERATIVE CIRCUIT IS ANALYZM RY PAUIi F. GODLEY America's Foremost Radio Authority (This 1 the second of ft series of articles on the Armstrong super-ro-peneratlvo circuit ) An analysis of the super-regenerative receiver circuit printed In these columns yesterday show It to consist con-sist of two oscillatory circuits which are supplied with 'merfry by one three-element vacuum "tube. The first of these circuits ha Inductance In-ductance and capacity of such value as to enable It to be tuned to wave I lengths between 200 nnd 600 meters. The 'tickler" coll in the wing circuit provides a means for a feedback"! of signals for amplification. When the feedback'' coupling has been made great enough, the circuit will begin the generation of high fre- j quency radio oscillations. Although) tho tone qualities of any signal will be destroyed, the regenerate e ampll-; l'ication will be greatest at thi time Tho diagram shows the regenerative regenera-tive receiver part of the super-regenerative set. Signal energies picked up by or Induced in. the secondary circuit .ire repeated bv the tube Into the plate eircult. Thev aro conslderablj amplified am-plified By coupling the plate and Krld circuits, the amplified Impulses may be fed back through the tube. HIGH INTENSITY. The Intenplty of the. impulse thus developed are very great Theoretl-cally Theoretl-cally this regenerative action may rake place as often as 250,000 times while the letter "E" la being pronounced. pro-nounced. As the coupling between the plate and grid circuits Is tightened, mor and more of the amplified energies of tho plale circuit are fed back Into the gild circuit until finally the dissipation dis-sipation of signal energy which has been going on in the gild circuit duo to resistance encountered is completely offset. At this polni regenerative amplification amplifi-cation la at a maximum it la Impossible, however to main- i rn gnoog. g 1 I 1 Rcgcnorntlvo rocolvcr parts of tho super rcgeueratiTe set, tain this adjustment. Irregularities of filament temperature, tempera-ture, minute as they are. cause slight variations In the amplification of the tube and the energy fed back to the grid circuit is sufficient to more than offet :o5.s there. ftH ance of the eirrult, then. cK exists "1':,!bbK an 1 In., become a nejatlre r r id of dKsipatlnt tlfBP signal energy, It Is actaH erating oscillatory eneriy 4H being supplle,j .xvf-(CopyrlghU .xvf-(CopyrlghU 192? NEA IH |