Show IMP flo i A A I 1 left cincu it D igen wh ch it Is the principle of the M de 1 ta Is al of nid 0 frequency coupling Coun linn A I 1 it 11 I 1 I 1 I 1 1 1 11 1 i 1 1 I op f f 1 11 it ft al I 1 1 ff f i li 11 it lt 1 ti I ll 11 1 I 1 v r in I 1 it i ili II 11 11 lilt it I 1 t il hi in I 1 r s t 1 14 I 1 tile III II 11 it hi II 11 I 1 1 1 11 III II 11 ha 4 I 1 ot HI 11 I 1 ft 1 I f I 1 it III 11 HI ni i il it lini iii 11 k 1 1 1 t I 1 fit II 11 I 1 III 11 ll III etim 1 1 I tl it tr I 1 j L I 1 1 11 I 1 alil 11 i of 1 I 1 fill 1111 to t colim rolim artl H I 1 r II 11 II 11 i il 11 im 1111 us f r I 1 lill I 1 it ih h is ti t is I 1 n 1 14 1 1 I i 1 sl 1 fir hi tit if ill till if till till II 11 I 1 I 1 ll 11 li it drawl I 1 11 ka I 1 if lie I 1 I 1 I 1 it I 1 I 1 I 1 ra nil il 41 to met lit th it 11 it II 11 t 41 I 1 i III ll 11 t I 1 lit oft I 1 ill lul lilt lit 11 1 l 1 h 4 1 I 1 film III lit 11 HI f 1 I 1 t fir if idt V t 1 lit i f 11 II ilni ini leg 1 ali tl i 1 of 1114 ml 8 it in ill fr r if 11 th lit lin 11 II N I 1 am it IM A will known knolan alin han itei ditl phil 4 of radio freim if abill 1111 if it 1 n lire HI off loll 1011 1 tit ili I 1 radio rp 1 it em PI IK Is n fahn for holcom 1 to oe fir in tin the I 1 I 1 lot in 1 lilt 1111 to lh comins linik of f null fro 1 I it i in lit v ener fr ili tilt 11 biliti iti fir ir lilt tilt of f a tut tap e to tile irl I 1 it 1 tilt it t f till other tl it e or or to lip n un is eri cri I 1 it nult till the feed back thi no re arr in iretis r il it ree wn i p s P of tit 14 fal 1 lim low it iz lie tie in ili trod ution ft f P into tit rn ra cilla collators tors dr cir uh tilt ni no n if f the tule tilt e rapa apis it t or aint 11 it agn itic t C o 0 4 cill pling in lit tr clued n int i tile t ir alt 1 t of dm elp I 1 ro n f r pot va I 1 if it top a I 1 I 1 or plimp ai q tm M y e I 1 to it tt ut of ite tie in coming Eli inal lam last tilt nuth ill 1 1 14 1 ill it empi jell in 1 tte tip 1 tr and 1 IS sit I 1 the ht h I 1 in it lien phili ed 1 in thie this reveler thre tir re Is ill a it dafter en i if t tt r in the aa in ili 11 1 h 0 A MF r ono 0 2 1 0 I 1 FIG 2 10 V I 1 the receiver employs the above wiring diagram the circuit Is accod for in the tile sup erdyne this u ws culled negative ne gatie feed feedback block Is I 1 by coupling n cull coil in the tile plate circuit of a stage to a toll coil in the tile grid circuit i whereas in the the coupling Is between a it coll coil in the dia ment circuit and the one in the th grid circuit tile the fundamental circuit Is shown in I 1 hg li I 1 here the tile anmon terminal the tile negative filli ment con coll nestlin Is broken and the feedback feed rick hAck coll mill conne connected eted cro cross s the break the polarity of taft feld back coll coil Is to he ile mide quell that it will prevent self oscillation ill ahova hows the complete iring v diagram di agrain of the set three such fed reed back colls coils ere sure used one for each stage of radio frequency amplification and t tone one for the detector circuit One might i think that 14 boing go so many adjust alle parts the operation of the set would baoe very complicated such Is not the fuse vase however for it will be found that two of the feed back colls colts can be he left untouched once chev alart adjusted so that the number of controls in the set Is reduced to the three con condenser dener dials and one dial ft for adjusting the first brat feedback feed back coll or compensator the idea Is III that the second stage of it R F amplification Is adjusted on the long waves FO foo that as the feed in cre creasea lases with the short aag waves there will be lesa less tendency for oscillations that li Is the set ie Is tuned turied in on the 1 longest kare it Is desired to elve ay COO OW tatters and tho th second and third colls coils adjusted tearfully ear fully to 09 t at t bich bowl howl enli jilt felt A r this y 1 delfft lo 10 I 1 ft aim i r nall n all lilt trio rr r it tit i f fr r I 1 litrov I 1 if ik 4 aunt r feed fisuck I 1 n it ter ditl the amp fic itlen I 1 lh ile 1 lit t a 1 abe ann t i it 0 o A boref 0 the floel I 1 1 i i e crith a for I 1 rot xulla f tin the 1 4 fill liiri 0 aig ix I 1 i fir ON ll 11 affef W und third i 11 o 0 it 41 tit r ile it eleft left tilt 1 I 1 in tilts 4 1 I I 1 tr not Sll tt bithal point I 1 clatin I 1 I 1 1 I horo in im nil li 11 ing mcglon with lilt tit ait ii ing ot of b I 1 sick colls will I 1 i 1 I with ion tion with mth resl i I t hie the of f it atio 0 tunI tuning nj ill i ff it kiji will in tills this aln alt it ti atilt t die I 1 island lit fit that ill I 1 I 1 f the roll coil aich which in 4 an i ed 1 to b r allent ihil lime I 1 e I 1 Is it 11 n 1001 tills this it being 11 it I 1 the do if lie at tilt 1 if 1 I 1 t 1 bilal nd coll coil und lit tilt tat I 1 11 I 1 if tent of rensa tors will nn tt iw go ee ariti 1 I his 14 1 c 4 to it e I 1 tit alf e of iii I 1 tin I 1 I 1 lit i the of tile lie ci fil it I 1 tut tit 11 liter to case here it Is it 1 ml red to tot J the antl n I 1 tighten A iu ill ii it C list bt be t binl s red t it I 1 if at t the 11 ll ra r 1 ini lit similar to tin r reed d lut tut it bell 1 create I 1 ing aa 1 IM 11 P will it II 11 u ti is os tiffi I 1 rex 1 d A I 1 I 1 m it am ditlev toward ij d i ii it itra pred ered too 00 oo ll 11 t I 1 e ral 4 be iu lu tl is to th re generall n it is ll 11 04 r dent that wi if n u reuse regener r I 1 ti he v 1 aeration that will aill x 1 I 1 l in the I 1 is III it blut at will h it r arpi t T du lit to tile n tur I 1 1 len at pid fro ai hi I 1 11 I 1 it 11 11 construct onal the first let ii lut I 1 rl veler Is to i 1 r i t lie bat beg lei neos ary sary mat it A r by I 1 anel uriel und a 7 71 1 N 4 n li it bas basc t ii tile U eel in ili aft r t tl I 1 i el 1 I iti with alth the 1 I 1 tu rhe rii construe i atie 1 I e ma ra ri luno 11 r oue three ili 11 r fill 1 r tubes lj indie 0 1 as inthe i ion ure ro iirth 11 1 for wound 4 1 turns turn 11 I 1 D dt a heeti il A 0 turn ind iiii lii I 1 f e v i ra wire dire composes P ni loses a if I 1 rn ra ary v li rt I 1 of an inch from tl ft erst L 1 I sec Is then lc heal I 1 for another 4 1 i rn ans tbt the ti ill sating coil Is next I 1 11 I 1 el ed 01 alves and f 1 ax I turu I 1 wound ili the tile 4 it te w in that of the tilt tier tl er n I 1 I 1 cs V tin ilni brar brackets bets are ua u it tell tbt tilt r rs ri to t cotant hoard board the tile above aboe lip rii ril t 0 ve I 1 alte two moot of the trant arnn l i era the all ME I 1 ing 1 slightly tiff r r t thlu ito peno atin toll oil if 11 1 f bell on the tube itself I 1 I 1 bmw led oil the e w f rotor at one en I 1 rotor Is lea a f 1 1111 1111 inches in diff illif it r I 1 nl dd vt lt at fit one end of 1 w I 11 I 1 I 1 in i plis pa aty turn winding in ding it n t n pose the ak wire ire hi tic ID r ill dettlo since tho oil 11 an bj we turned through degrees cs affo A it change its deal recelle W lento the wiring f t P sin 1 tt re difficult very velry ref il 1 irod C 0 u rules except ti it uble in I 1 e tr MU good 0 11 gr Is perlen ced fr fro m I 1 I 1 K ills ailtee to ft the 1 at a do should be rev belr rs I 1 I 1 ne 0 bleg he the under dral le I 1 bated it will ili te le fund fa I 1 fadl 00 nd deahr ia place two to b pilot to are al the it hutton bet lesto leor mr 25 5 mad I 1 ten bofty rf inglot na long prid grid and plot pinto tem alifier audio of ot the laty As re ra ra t h e t ind it 1 ate to 60 thir h it Is 1 barks the tta of the 1 majolly in tWO I 1 n I 1 I 1 le to of S d values of the tile o a 0 I 1 I 1 r I 1 Us correct 0 strands tolled the re elver sl wool step in the dp 1 of frequency sets tic the coalso bt noted As will he be a r ill 1 0 to 0 6 inches part itt mum the tendency cl 10 istl with alth r coupling 01 rt 11 lit of two stage ilio fl fi catlon cation will ill be found V W than sufficient ale it h 14 I 1 sary to incorporate find of 1 bi ed 1 denser across the of lue the last tub tubs |