Show k J 6 t todo to do 1 by ny 4 n il he 0 1 I 1 beyo un if oil it til tit lit jet I 1 ir e lost I 1 pd near it 1 I e enter iss I 1 in of on n tI tion of 11 ll 4 ra its it frel 1 irn ten y unit known as 11 the flip arinee ri rit fl el lent last v ek k fir anol P ion lion of I 1 ilif if aides of the ir catl oil off ti ill nil I 1 I 1 0 made at it the ap apt pr fatir for turn lo 10 air uarl I 1 tha turn turo alfild liin ll if i illel oil isery iry ill KllC ghaly llly a not a left I 1 to I 1 IW bertl 4 n the lb ill to graphs tin I 1 circuit lift train grain li if blute the in lit A FAY lo 10 as the farts i arc an annl I 1 in fit also much better tte tip tl if not det tills it glnn an ran can be he done conr in a fiort I 1 of the turtles on ll 11 r hinline f 11 II may be funi in elzlor allro still if it flip nire mire and 1 missile of illi tile poll eoll need not I 1 r pit fly 11 nl at ls but the conne 1 flie tn tun fun ing ln eonda 1 rim r olinus I 1 have en an in fit life tance of at 20 if it for my any reas sm the must I 1 te e changed an erturk undine finding pout post in furril ithel connected directly to the th grid to en able the uin use of a very ahart antenna if a lone long one li Is not ie the th output roll coil ti in completely en closed in a to prevent damage to the leads and to prevent flip it bat tery forry from being aa short circuited since this coll coil case ti to somewhat difficult to construct the builder of thil this unit should take particular kalns to suitable uJ table connection to this i coll coil which are protected froni from breakage carefully wrapping the terminals with ith tape will ordinarily be if a spiderweb spider web roll coil having about 60 turns of wire with a tap top on the middle turn Is more convenient it may be uel used instead of the honeycomb coll coil A good roll coil may be made with two wires wound in parallel on ailder web frame each winding having 40 turn turns of wire the outer end of one winding should connect conned to the loner inner end of the other and nd to the center tap A flexible two conductor cord hould should be provided to connect the output coll coil nith ith the rest of the circuit the ile center tap of the output coll coil li to connected with a flexible cord to the plus terminal of the II 11 battery which should have the voltage recommended for the tub tube to be provided for am use thie coll coil roay may be laid on top or inside the cabinet of if the lie main receiver celTer re whichever li Is nearest the arid rid coll coil of the detector tube it Is I 1 to be noted that no ground connections are necessary on thia this 7 top rap view of the interior of th clarifier calt wt kince since the regular pound ground li Is to be left oa on the receiver itself the an tenna Is 1 from the re beiter 1 and connected to thia wit circuit th the antenna and ground binding post posts on the welter welver are to be connected together on kingle single circuit receivers rec elvers 1 such ai as the grebe CR 9 or crt 14 0 on double circuit receivers 1 these post posts maj may be connected together also lao if it li Is found by experiment that there li Is aa an improvement ImproTe ment by so 10 doing loin it remain remains to be shown bow how the balanced need output circuit of thia this tube Is adjusted dJ and how the clar lder la Is to be used in practical crift ca A after after fter the connection have been aade made to thil this device devIc fb the tube in I 1 turned on to normal brilliancy the receiving iet set li to adjusted to a low wavelength wave length such aa as about NO meter meters and a pair of m calvers 1 or loud speaker connected ai as usual the antenna and ground bind ing posts on the receiver celTer re are connected together the balance la in the radio frequency tube li to obtained by adjusting the he mall small variable condenser this adjustment can be made in sei way ways set the receiver dial dials to receive 1 a signals froni some broadcasting eta uon when the tuning condenser Is swung around it will at some position be la in tune also with the incoming signals Ig nale if the cla clarifier clarl fier tube la Is oscillating cil the pitch of thit he note notes re calved will ill chance change as it its tuning condenser ll 11 swung in and out of tune if this tube Is it not oscillating the wert intensity of the algnar will change but not the pitch since it Is to top stop all oscillations in this tube the small stabilizing condenser li Is adjusted until this Inte intensity only Is when the toning tuning condenser la Is varied another method consists of utilizing the feature that SH U oscillations in a t I 1 e oras arc 1 I to i I 1 I 1 y t 11 1 ing IR it t f r frfd rid tens anul if of I 1 flip ir ill tit HI lit ilif lingat I 1 hiir lip xeal Z g c fit it 1 asset IN to U 11 akl 1 NO an that it no pim kanir n ar 1 r 11 it lit I 1 leard alim hen grid rid Is in Is left ti 11 if I 1 P I 1 lift the angi 1 r 00 oo t s n I 1 11 I 1 r stiff binl lying r ri ri deniker IN lot one once adjust ts I 1 tin I 1 ll 11 1 a III na nt it dials lUll dill till I 1 ti i aimin HUP the omitting in n I 1 if 11 ritt hit ill lit nn noi if ahr tit in 1 r ariy 1 I erly 4 n nostril I 1 I 1 it fir lina rIly no n ed fiur bi bo I 1 a I 1 1 I aumill III i irr r it r if tint tit tuning he bo fit i lo 10 e toty 11 atif 0 t r 11 flat limy be all bruto I 1 dinine tie tip ro oving met an I 1 tl it pit lotto r 14 I 1 hi ill it un an 1 11 P rs i eler inny if to f r varl vari it it VP ve linci toy J fling imn lie tt fit n voters path FH stall n lot imi I 1 it nifty I 1 ic so calif aalt I 1 agal its 1 r f riving tie by coul ling lift ih botill ont ut roll coil near tit grid rid nunlie conden in ile t lorl flir one or two wo ell its will be 1 heard in the receivers when ohp th two wo arc are in tun tine with each other if tile th hail tins been property carried out it will be found that the adjust 4 41 P view of the interior of the clariet Clarl fler a r ment required for a particular wavelength li Is constant from duy day to day it will be found that the signal in ie Is greatly imi roved since the device seems to be a particularly ef radio frequency amplifier although one tuning dial tins has been added it will be found that tuning ID a much easier than before this ills Is dae due to the fact that the adjustments of a single circuit receiver often chance change from time to time depending oa on the th position of the tickler coll coil or plate varl ometer and a changes in antenna constants in this new plan the resistance si al in the grid circuit of the detector tube is lower since the antenna resistance Is no longer in eluded therefore regeneration ie to ranch much easier controlled and Is not as critical as before the its lower resistance in the crid grid circuit of the detector tube in creases selectivity remarkably testa test have shown it very much superior to double circuit regenerative rec rece elvera frers in this matter A wave trap or filter Is not needed since this radio frequency unit will do the work instead there should be no necessity essny for receiving any annals signals on zero beat meth od so the quality of the received tig nals Is also improved and there need be no squeals in the receivers or loud speaker all these items are tire conducive to prater greater distance reception so the device seems well worth while eyen if the receiver radiation item Is not considered to use house lighting circuit for an aerial the lighting circuit la in your house can be used effectively as an aerial for receiving purposes by using one wire of the line the accompanying illustration shows one simple method by which tills this can be done A third wire Is twisted around the lamp cord and one end of it Is attached to the aerial binding post of the receiving set sel the effect Is the same as a direct connection lection tion as the third wire forms a coti condenser denser the rubber insulation on the wires acts as the dielectric and the two wires in close to eich each other as the plates of the condenser con dener the capacity of the arrangement may rot mr 02 1 ip baw by twisting ng a separate piece of insulated tild wire around lamp cord arid attaching its end to the aerial binding post of a receiving set sets the Lich lighting ting circuit can be used for an art aerial be increased creed ln or decreased by twisting or r untwisting more or les wire emend the at lamp cord the correct amount of ot wire to use can ott only be determined by experiment use two rheostats in using compression type rheostats it t may be found inconvenient to torn turn the knobs so much to light the tube tubes there are tw two ways of eliminating this either ue tite a battery switch itch or I 1 a is wire wound rhen rheostat stat in to parallel I 1 to the compression onn out by so do I 1 tog it Is ix possible to use the wire dooni rheostat ou 00 local lomi sta stat tlona ilono and to Is the finer control oa on distant nation |