Show W NN 74 lot L ca CA ld RIM I 1 picture diagram of receiver which will be D of assistance to novices who desire to construct voluminous UX DX set by HERMAN BERNARD Asso clitte institute of 0 radio I 1 engineer once upon a time me ne saw Nar lable conden sera lint flint hint half about 43 plate 4 ind find were rated nt at nial capacity do you r demember the lu dins days TI unit I 1 it t value alue of capacity was extremely lar vitt put us its reler receiver design improved and a higher ratio cf if inductance 1 to I capacity was tho thought light advisable such inch na as and particularly i nim climie into fir favor now the lie and tile nicil con condi dewers users it anro r ki 11 the ie most it binl ilot ns as tiny they fall lit in 1 like ice ly with sch enies of it space conserva ons tion they will well desere their hour hut but the nicil tuning con deweir silt I 1 biad aai hi use it Is in it hip Illa tenna ca circuit cult there llxie ure tire several ani 0 of r including it but lite one lite shown in lie diagram Is ns jig good as tiny liny the aerial Is I 1 tuned the condenser Is used to tune lite till circuit the reason r for the abnormal capacity is that it Is per factly normal in the position where it li Is unfed it Is ii lit in tile aerial circuit and aind the glennn helfin ell cu Is across it to lie in sure mire the oil if 1 L would see scein to be slim t di cult ing fiig that antenna cap capably acly lint but that Is not quite th cuse the 1 he s 1 L 1111 and I 1 II 11 are in tile ground 1 sista ni tind tile lie aerial ground cli lItY ity pla elins s its alls part lit in that hint lend h id tills bis joint coll tile ari jint knee of tit HIP circuit A AM i niad ill fd condo neer lie be used 0 of f inai if one K xii or wl it it ones aerial captivity wu lull but the hie 9 cues iv g a wider inari jil of barety the 1 lie olt of the largo capacity andt tuning condenser str Is to insure it a dent clent ratio between max makinnon innon ond capacity so that tin tho entire broad broadcast vast blind will lie le till ill ii tibe HM circuit Is simple ie any one familiar vilh i radio adlo clin it tit hie gaii i 4 turn if ins necca in s fin pan ry A com boril tile linnel for ills his set M t would lr hv 7 ba h 14 indies anil all it would be so lull lali out flint the aerial nerl 1 tuning con flener lh Is nt at left tile lie thiry tuning condenser conil diser tit lit right und the three chault tuning toll coil luit LU it in ill c il r between Ile tween tile alii c didiot ellit coll coil alit antl 1 cl I would mould be lie file tile 1 I lie jack lq Is place placed tit nt flit lie opposite point the tickler would not require a A kioh would suffice or a two andi aich flat while four indi inch vernier ollars be used on tit the two condensers A baseboard if used would lie fie 8 by 31 1 in inches bea secured to the holtonz b by wood screws the hie coil oil 1 I would be placed horizontally lioi 1 3 indies IMil lid the HIP end plate of cl CI faille the lie acir dr cult would be mounted cerp n on the panel A six ida shelf 21 hv by 13 indies inches would be just lis as suitable coll data lai sil may lie be a coin merd il 3 circuit timing cil 11 lite of ca depending depend iii on the cull coll ut used mot often tills this would lie he bifi por lir those desiring dek iring to t klinl ind their own wit 3 circuit coil a 1 indi inch diameter mentor form 4 indies high ajay n lie ito the primary aa I 1 1 of if id 10 turns turn leave leae 14 1 indi inch spud then wind 45 turns vir fur the iry 12 I 1 2 TI 1 lir I 1 tickler Is mound on a andi er 2 indies inches high and consists rr or tit ahn wire Is no 0 o 24 double cottri n it Is coflin boriin nym to 11 use smaller wire on it tile flip taller say RU no 20 fur for it dont do nt there lipri on fin the resi resistance score As a anft penetrate ohp he santor and at lift le eircil eirp il to the hie rotor part of lite lie rotor wind mind ink ing will be separate lit at lynst lenef ow wilh of this ills shaft and finver iii r wire birc makes it ensler to lo put pill on oil enough Tinn cli turns to get regeneration on the highest re cel vahle vable wave anve the seco secondary noary 19 I 1 to lie fined with OW mad for own i use 55 lui ns for use ue 31 11 As for the coll coil L that will mill require some my own in aerial has a capacity of xo on and lite hie proper coll coil in conjunction with it a wl con dens deenri fr for VI cl happened to lie one comprising 31 turns on a 3 andi diameter ame ter tuning no 24 da wire huing heing used but soine tin tenna systems sv stenis will require a greater number of turns sonic somo a lesser lemser number it la Is a good plan to put on 40 turns then peel em cm off ns necessity dictates the set operates efficiently on any of tile the popular types of tubes including fry dry cell tubes mount the conden condenser er cl on the panel also the condenser C ca 2 1 then ilien mount the coll cell in the center and next put on the lie rheostat and jack put the baise baseboard board temporarily p the panel annd bottom and 5 anally place tile lie roll coll L and the fie socket the coll coil Is lit at left first con derer the coclet nt at right the aerial coq po will lip lie tit nt left rear it lie ground post lit at rear enter center A battery build cubit nionila tile lie noce of binding ding 1101 tt wiring directions connect tile the A battery liliar wiring lili iR on oil tile parth list first join A button battel 3 plus to lip fie I 1 V plus post or the lie socket and to tho rotary plates of 2 conned A minus 4 to ono one of the rheostat III it tile other side of it iti to abe I 1 F minus pot post or of ahe toi so ket alip tho W type tio tubes have their filament i all and plate posts differ antly iila l from tile stun standard dard li iw e tubes lubes so we see flint you toll corre fly prid tit lie post designation oil tit lit rocket after mounting L connect aerial to tn one OIK of if Ls ix terminals awl to the lh stator of VI cl while the ali rotor of cl unit tit alio re i terminal of 1 RO go to the lie be timing of the primary ll LI tile end cud of which poes goes 0 to o ground the end of the secondary second nry goes to 0 tic e lend lint flint connected connect eo to tile rotary cintes of ca the A plug lead while lite other terminal of 12 goes to on gnp side u the hie grid con condenser demer ca 13 ill 1 lie other oilier te ti I 1 i I 1 of ca Is 18 connected conn eded to 0 o tit lio e g arld rid po K i f the lip socket marked U i on oil lite hie socket across the grid on oil danser di user whit b has or culpi for lite HIP limpose Is placed the HIP grid leak 2 meg ia though tile t tn pv little kiil liil will stand n higher value ilip of if arvi aln fance say 5 ohp 1 ofle 1 ip post of if lite socket marked 11 I 1 01 s 1 to in one HIP of I 1 TA alip tit other oilier if which li Is connected to the it ked ll 11 spring of if the 1110 jack it will be noted nold that in the hie till lit in the hip text the grid return Is fl ignatee us A pins lit mill 1 I 1 Is correct for nearly till nil till tili although in some few I 1 the lit grid return to A minus vu work better ix clr alif cornet return Is important the parts needed I 1 impedance coll n L I 1 1 1 tuning voil oil LI LILII 1213 11 I 1 wa enfil variable lile cond tiser n 1 1 MK i nim varl ahle condonier con indi denier nir ca 1 llan inal erld condenser liidi user with clips c ills ct 1 I 1 vird fixed condenser ul I 1 single circuit jack 1 ahin rheostat ill III I 1 5 runes nigg grid leuk leak 12 1 09 0 rocket I 1 7 lv by 4 inch panel 2 4 ill ch vernier dials 1 2 indi inch tit or knob 1 0 im leaa 1 battery cable calle accessories one 4 41 volt olt A hut bill tery usual 1 I 7 battery serving tin file pur purpose 1 99 1 tyl tulip tube 1 calil liet to lin litell panel und and baseboard NW s KH IX feet arf t aerial wire 0 feet no 14 insulated leaden lead in wire 2 aerial in Ruin torii I 1 ground i aund claing cairn cl irn note op tit alip use of if a n ay iy tube 1 li presupposed if other lype MP of of little Is used n d make naces s hury ar Y substitution of equipment |