Show 04 ajo of tub pr fo off turn n odow a torrid of awil f 77 q jo I 1 1100 am OU is 4 pun 0 JO 0 turns ads z it 7 9 0 A aas each side I 1 by 40 williaml fl A V onins tho Iino Sim circuit linail reflex lov lire dill allily imite sit to of but inq deual intili ill f bo oil tired pails SV a to 0 particularly when used al outside aerials reflex circuits 1 tuillie tuil n al lne arlo coup ler lal and pug 0 U or 10 uri ometer and pug condenser tuning salum sensitivity PUS 2 to 01 a it iiii degree and pull are ery hat but inq due emp to ol the oil number quintz Ja 0 of instruments tua employed are em rather costly and aau lp difficult linW to 0 wire end pas operate by those who are div inexperienced blui ulf receiver oal in at the oil index circuit nail 11 which Is al to 0 be eq described here fixed coupling between the oil primary and pug secondary circuits ie ill used it 11 I 1 el not ion a 9 compromise pw jv xvi W I 1 1 4 bat possesses assod sass most of SO the all ad PI vantages o of 0 the neove circuits with none own of SO their disadvantages aa by to 01 tuning nothing is al simpler 1 as u there Is al but inq one quo control used besides the oil cost of so construction Is at very liaa low mol although complete details of so the oil construction of 0 this receiver are diu fur fished in al fig I 1 and pau fig ifa 2 which qia accompany this article a I few aa words regarding rewords the oil winding of so the oil tuning colls elloa would not ion be out lao of jo place the oil primary which consists o of 0 ten ual turns o of 0 wire Is 91 wound on no the oil center of so the oil tubing the off secondary which Is 91 split in al owl equal halves of jo OC 30 turns each UVA not ION needed in ut tuned L paun plate D circuit one of o 0 the oil simplest methods of so obtaining regeneration Is 61 to 01 place david a V I 1 single slide tuning iloa oil in al aill plate circuit lin the au coll lio should have at least turns so os that lull the BED number may sam be varied by IQ the oil slider this 1111 method Is 91 shown in al the oil diagram mra below to 01 the off left and pug although body capacity luta be noticeable the ain coll lloa makes a v A very al good substitute tor jo a the ail xau next method Is al shown with MIX a 9 variable condenser fis shunted polun around a fixed palli coll liol this VIEM coll 1103 may contain from mol 00 to 0 turns of JO wire and pull the oil condenser nulls should ill be of jo the oil 23 plate type the oil capacity of 30 the atu condenser should be all varied to 01 increase or JO decrease regeneration if it 0 Is 91 found puno that controlling 0 of the oil regeneration Is al somewhat difficult over all ill wavelength wave length of SO the oil broadcast bg stations taps should be vilu arranged Palla on no the dill coll 1103 in of step wall of SO ten ual the sill third iliadi method po Is 81 shown in ill the oil figure to 0 the oil right this EJU arrangement takes up da very liaa room A V honey 3 alp LAJ lujo laff I 1 ir A baill pap alif al al ON comb coir 1103 of SO CL 75 to turns la al hunted by iq a 23 or jo 43 0 plate variable of condenser paw Jasma this coil 1103 say SIM be eq mounted on no the dill end poo of SO the oil leads condenser eo og as at to ol beep doal the oil these alj coarse it 11 vault ism be realized that methods are us not ion as jig good as sp ho method of so obtaining regeneration but jail fire diu imply given aa I 1 of SO q hafft aa the oil nay fall back upon on original idea in case he has evil no on vario meters to ol con no beet in al his SL q set lag this method fout poli in al the oil was asu used a pas and may im tills be employed XU tor loj those who ila 0 do op not IOU 0 fos o to 0 the aj O 0 a 0 of care oita to 01 1 although the reat of P the alp plate ma circuit imm ig vi wound on no either aide aple of so wil abw they DILL are oil jig wound in of the oil aimi fr PC 4 towai red ion A c the heart 0 of this circuit is if sin fh tw au r tal ili boctor Moc tor and pug ono 0 of a aou be purchased it mil may MU variable or io fixed although althou fh qi the aaa plow is al preferable as au it 11 Is sl lot et at IV la sit fill hlll SUaR sensitive point and pau tulla eliminates olp th I 1 iet jap Y 0 of farther adjustments aal r d the beet which was ava li 10 the oil writer hai been in of im ib rm bif ral men months and pun when juian aln I 1 ac a tube alth a v plate voltage o of 0 sio 45 it 11 b te ol fl 10 equaled the gill best AV with ali one quo of SO audio be eq hu liall err oil a used both in al distance and ii tte to ol operating a loud speaker that 20 1 ponds on no what the constructor ion 0 of working a V loud ON speaker LL 71 jill IC silvia the oil volume on no local mails 4 I 1 all too oo 00 great with headphones a quil alom sired pails to 0 brine the oil signals moa ft ipa receder to ol dancing Intend tji of so audio alp ilp 11 step dole can be connecting tho din primary o of 0 nu gall op ws transformer to 03 the atil output jack I 1 i q phone leads of so the fail set lag th lauff o of 0 the stil circuit Is al the linom anio ins bacab qoon hookup the part required for lo 10 the oil court not 0 of this zoal Jalla are gag as to mollo al I 1 1 piece of o 0 tubing 3 inches IOD hol cl pp is 2 inches la in diameter IT pound no OX tz 24 a D S a 0 M 0 I 1 23 plate condenser I 1 audio frequency transformer nil g astl D I 1 a I 1 radio frequency 5 adl T bithe all I 1 20 ohm rheostat wg I 1 panel 1 I 1 baseboard M 0 Q 9 bandin pd posts isis phi I 1 socket depending on no type lo 10 olta api used baltis I 1 open injia jacht aar imol I 1 1 crystal JU detector usg 0 I 1 wo fixed condenser abul I 1 bus bar screws nuta ete va q york laIl berald Plu will sam I 1 Is sl not jou shown I it 1 Is al important lauli to telephone receivers and PUB 9 sq be with a 9 filc denser this alu condenser api lis ax 1101 radio and PUB MA tri cam i frequency bal Lauan by iq pass soud to ol increase the eta effective faalai u thi coll 1103 and PUB condenser me r t also be employed in al the grid pup place david of SO the grid it boost the wavelength wave length of SO the ec dj ary SIB circuit jut the same as a the all I 1 A V few trials tilia i eter aaa substitute may be worth J u 72 condenser Is 21 essential nay ITIC mi I 1 I 1 part of radio 0 ciacci balsom the DILL condenser ie 61 one quo 0 of tm OR o 0 III IM parts of SO a v radio dacut paa sl wolf gilligus JO tuning solon ft V circuit t 0 TV y itam V there are two oab forma gwo 0 of den sers namely and pug no q y 14 consist 10 w ta the OU floed condenser za a ak aetna conductors separated bya IQ it clovd eulator called a dielectric A U strying aak condenser consists of so two 04 slag of ao 00 UA plates one set movable I 1 una via tax the movable VId plates ff 1101 ro tat IV opts of SO the oto fixed fuld plates loa jail fl 9 poll I 1 touch them the ou air fonne the am p PA trie dill between the ld platea salv a PO variable are al con deneen to a elder ably for jo tle all a length waal ick i v circuit or jo coll 1103 A condenser polia in a eerie VIA A yog antenna tuning coll iloa or 10 in U berie pun aiom o 0 3 the lonois and tie anteen ha coll lim will reduce the oil wave v L a coll 1103 aa by a 10 I ala rule 11 the gill wate wyo to 01 be reduced the vilVA variable alfi cos 21 I 1 falout Inger ted in of cries allot with 14 to cl avoid hand ca A ia tt polls to 01 Inc JaUl renge asua the oil wave lew variable of 1 connect 1 tin the coll 1103 aad PUB in ul ali 02 4 b the ino rable platea ginotis if 1300 necked et t ahe round adm u |