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PAGE 6. Regeneration, as applied to radio, is the process of Obtaining addi- tionaI amplification from a vacuum tube by transferring some of the unplitlecl signal energy from the the input output circuit back to circuit. where it causes the tube to 49 still greater signal energy in the output circuit and so on. The above process repeats over and over again each time releasing more energy in the output circuit. Thus the amplification obtained is very great, and one wonders what it is that limits the amplification ltweneration, as applied to radio, circuit, the internal capacity of the '1 tube (indicated as in the diagram) {1 s the irocess of obtainin addi- - ‘ g furnishes the coup ing. In the Ul- ‘0'13' m‘l'mat‘f’fl from a vacuulm tra-Audion circuit, the variable con- ube by tiansfeuing some of t 0 denser (12 furnishes the priDCipal E 1 I implilled signal energy from the coupling. iutput circuit back to th a. very yaluable :ireuit. where it causes the tube . . _ ., >roduce still greater Signal energy “I mously increases the sensitiwty of the receiver. There are, however, 1 the output circuit and so on. . r some undesirable features to regen- The above process repeats ove . The radio fan should be 1 and over again each time releasing eration. more energy in the output circuit. able to recognize these features in . Thus the amplification obtained is order to avoid hem in purchasing great, and one wonders what or building and in operating a re- ver it I); that limits the amplification ceiver. . . obtained by this process As important. as regeneration is, the it is valueless unless it can be Theoretically, all that limits , , ' ' the closely controlled. This means not amplification by regeneration lS , resistance of the circuit and the only that the operator must be able stop oscillation, but ability of the tube to handle the lo start and power. But. as every expel‘l that he must be able to closely reg- knows. the practical limit is reached ulate the degree, of regeneration up when the. tube starts to oscillate, to the oscillation point. The con- which is long before the foregoing trol of regeneration depends largely theoretical limits are approached. noon the type of coupling used, but The Superâ€"Regei‘iorative principle also upon the type of tube, the fila- brought oug hi and plate voltages, and the ht by Major Armstrong me VA R/ABLE ‘ ‘s. ‘4’ f"?' "I \‘ -7 Y m; a t, - \g' :GRID LEAK VIII“. luv ‘ u -r 'l‘heoreticany. all unplification by re: resistamm 0f the ‘ ability of Hw 'tuh 19'") is simply a method of in June, w, . _ preventing the tUbf‘ 1‘ rom oscillating, regenerative mus permitting the process to continuv hvyomi the point where it. was ft‘n'wiuu'ly stopped by oscillation. The transfer «'1' vnvrgy necessary to accomplish rvguncratit‘)11 is brought about. through the counling -r Ll..- 0‘1'ai nn'lHiHS “I“ ‘0 aUCUlllpuau . ~. Dy---“ _-. brought about through the coupling and tuning of tlu- two circuits in- volvod. It may 1w magnetic or static coupling or a combination of the two. The magnotiv coupling IS tho. method cmploycil in circuits using a “holder” or smular nt'rnngomont. Static Coupling The. static coupling is the method 050d in circuits like the varioniotcl \lllell. regenerative, and tho l‘llraâ€". In the aoovo mentioned variomctc-r y”-.- .- _ M‘- '|‘hv oxocutivo of the Southeast ‘ ° ' Uty met. at. the Markâ€"- (Copyfight. VA PIOME TEP RE}; L. n Co - COUPLING By R. M. SHERRILL (Radio Engineer) Lightloss Vehicles nave Appalling T011 01 Li clnmlnatm . Hon. George Henry, fathered .the last bill to thls the mandate of " vor for during that time _. League has campaigned for the abol- lights at night. pts from news- The following excer _ the province are lumenâ€" tive of public opinion on this vital matter. In a lengthy editorial, thte Brantford Expositor declared in par : ---- . mnlnl‘ accidents 5.?" :5; pumm- wmtwear ? tion if ig carving un ljgh}; and the. Slowerâ€"galng VPthlO 18 m become an intematiqnal necessity, adding. “If We are some to dual... themtml part of our two countrig to the extent that it should be «lewd- nned. we must support this grm ”h pAir éombincs the longcst 909“ '13]: wear ? r is tiresome. but since why nqt wear RHINO _ -- LL- “m, noconhor u. an. hoaryâ€"'1‘: bull; ViS' Inhaler a .sncietias Mr. W. .emuiu, ‘ still in}?! An'evem of sperm! (owl supper and 30013! In by the mc-mhorc 0% a - 2855 and L”. H. A. Car No. “5 hero. [mid in 0n “nursdav 1-\0ni1'11:.1 AT“)? the splvnmd sum ful Nutter Frank Dun chair Illd cnnduc'vd [1mm in MN "SH!” I nor. A debate. Which 1 h‘ratm and :1mu<im:.| a"! lad Ram W “or v 1' h‘V. ’. alrmm-r (I \n dd“ Whu h “' ‘18 N0“. . and hiL'WV V" Iistrnec. MN. 9 In addrncs il muryâ€"Trvasm'vr. K‘." . bull; Visiting Uvmmt’?! lnhlar and Mrs. II M‘ societies had a sum-PS “P. W. J. Mmds, wk- “II, “'hfl [‘o‘Sldo'S 1 “ill interestvd in farm ive hrw-dvr and Down sheep. I 0d us with “cum . k \L’Qig‘hpd r06 ”lies at Plvshvr‘ and we think tin-r0 at in this locnliiy who can Showing. 0n" .‘itm‘k 1 300 pounds. lmv pazr 1 «we. weighod “it put] other ptir 450 pmmds. Iing ewe wr-urhvd 191" any plir of «MP lamb} “It. Ml'r. How. Hm Presidan Mrs. (”My Secretary, Mrs. .I‘ .l Tmsun-r. Mr». 'I'. \x'. snmry "mu-.1. M rx < a ers‘ SN'I‘MaI'). Stung ' Dunno. Ladlf‘s' AM > M Mrs. 'l‘. \\ l't Pry-deg, Mn. my... (Our (mm Currm 11H) annual “Immuon the “251.5. and huh Mytvrmn Chum-h 1 Wk at UH‘ hum“ 0 ”WIN. 1!.“ I'HHHVN-i ‘ Wellâ€"«here's II your frame shakes Our idol: 0f a the cxchamn- Slip (OWN, 1925, [at fopyppr wife JONES: "Gr: might pay for It?" "WW your Gil YPII‘ Is :llbmlt In fl LIKP 8| that counts VON “Santa BOSS: "Here Flasher W‘SSO 0n m Id Bl!