Show edited by ci douglas airdrop editor of aw loing MCM fa 7 77 7 1 0 04 hewing showing constructional details of the th honeyb by HENRY M GLAND vucu building a lioney honey comb coll coil receiver the wiring of the get t li Is usually polled by the flexible leads that must be carried through the tile panel these leads are fastened 0 to o various bui bus bar connections which aich CO 90 to the other instruments thin this nestle that when the colli coils are bovid the bua ban bar wire wires are pulled out of lo po 10 althon this ii Is liable to came cause a short circuit at foroe some petition position but the main point la 12 that it makes a vory untidy job when I 1 built my receiver I 1 determined to wire it in a it neater nester fashion and finally dually hit upon the idea of a gub ab panel aa all shown in the drawing thia this aub panel Is 1 used alteration Altera fion tips T aps on jack wiring suggestions for wiring to suit working condition conditions of radio fane fans by PETER DAVEY th the majority of iet employing two states of audio frequency tiou hare have three jack jacks one for plugging in each tare stage of amplification and one for plugging in the detector unit only it la Is thought that the following aug but gest eat lon ions for the alight slight alteration of jack wiring will ault suit the particular working conditions of many fane the arst suggestion concerns con cerna th the A last jack which plug plugs in the second stage of audio thia this Is 1 usually a ingle circuit jack located in the plate circuit of the last tube as hown shown in fig 1 2 thia T his jack m o 0 ir i r i B fly I 1 li Is generally used for the loud speaker and in the majority of aeta sets the loud speaker la Is plugged into juta it for at leapt 90 per cent of the time bo so why not make the loud speaker a more or tega less 11 permanent attachment and u use the jack for tile the occasional plugging plu esing in of the phone it often happens that made music Is 1 coming la in quite well ell from a distant estatio on the loud speaker but fading falling occur occurs juit just before the an n bolc 1 cornea comes in and it is 1 u ec essary to plug in the chonea to find bad out who they are am pulling plugs li Is annoying to pull out one plug quickly and insert another la Is in the writer writers ex peri ence very annoying especially ei if it the corda cords happen to be twisted up 1 the arrangement in pic fig 2 7 la Is ft a refinement which 11 saves this annoyance no yance and the only thing necessary I 1 I 1 to plug in im the phone phones the loud speaker thereby being automatically cut out in thia this case the single circuit jack la 18 replaced by a double circuit one the loud spi taker la Is connected across the this two center springs so 10 that nor really mally it la Is always in circuit now w when b u th the e phone W a r p i 11 u d ta n the the c center t n t er sp bricca pr rw icca g 4 and n d c consequently 0 n s e q u e antl y the e loud speaker are an thrown out of circuit the this fact of the loud speaker being always in circuit make makes no 00 met difference when using the phones in the trot tare only provided the second audio tube laa etched ott off but if it it r ZI J h left witched switched on you will ret get a J ao 00 there yon you hare hay a warning 4 i to tell roa YOU that you are wasting your A battery currenti arren curren tl the tb best me ethod of connecting up the loud speaker is to hae have two bind be pota posts on a bakelite base an in hown shown in 2 7 these abe may be mounted either inside or outside the cabinet there Is 1 A tip OP for broadcast llenin of NOW bere hem ll 11 experiment ML what A 1 it te 18 to dalre it toft 8 am ctet a net im which is 1 a standard honeycomb roll coil mo mounting tintIng ind anti of a i alece of hard rubber or bakelite 2 by 1 inches mounted to the rear of tile be regular panel and about three quarters of an inch fruin from it on title are mounted at alx lx z binding posts for the primary seco andary end ani tickler connection connections the li to to the panel by indans of four bratis machine bolt bolts of the required length the flexible lead from the honeycomb roll coil mounting are passed through a it one quarter inch hole in the tile panel and fastened fuet ened to their respective 1 binding posts tin on the the cit cost of the material needed Is I 1 very little and li Is quite compensated for by die file improved appe Aronee of the wiring of the litt et eladio new newl 0 X in order to use the parte parts tor for experimenting on another which may or may not work successfully it li is liable to make one unpopular with the family kepi keeps th the sot working but if it you juit just crox cross over the con of one jack they may be enabled to enjoy two or three more L radio afternoon afternoons while you are at the office omee with that old set before having to put op UP with the usual or two of screams and whistles which accod pony the trying wing out of a new book up the jack referred to Is the one for pacing plugging in the detector only for all tile lie use you get out of it does it not dot seem that it might be dispensed with IlI altogether tOgether tince since it will not operate the loud speaker fie fig 8 3 show shows the tile conventional wiring for or this jack and fig 4 shows allows the tile suggested at alteration te it will be noted hat that in the latter letter case those hose t wires chich were ere on the outer 8 are now on the inner and vice versa now if it the he ping Is inserted in the jack and two lead connected with it we have a connection to th the e arar amr unit to which any detector unit ran can be connected for experimental pur par poses and this disturb disturbing ing the existing set in eny any ay BY whatever it also lias ties the he advantage that the merits of 61 two or more hook book ups inay wily be tested on the same stations find and under exactly the same con COD dillons dit lons new york son san primary liked for home built outfit one of the notable advances in home bulit radio set get practice e Is afis rowing use of the or OrI 14 this sharpens tuning with lacrosse in signal sigual strength tend tends to reduce radiation improved re genera tion and generally shar sharpens peas und nd livens the th set from ten to twenty turns of wire about three to four inches in 14 diameter to be determined by experiment nry may be placed on the tile same slime tube with the secondary can con be coupled tu to the tile of a honeycomb coll or a varl ometer or in fact coupled to anything now used as IR single circuit tuner cut down interference when interference ts Is araa annoying ing do not of get Is ime in e traps as it Is seldom that the average fan can operate them sue suc eels ress restfully fully it would be bettor to use u I 1 shorter aerial of ot improve the set to a more eff efficient lelent one an aerian tt feet long will often maket an in he set et extremely lec tIvis aerial for bua bus wire no 14 bare copper aerial wire of the solid type makee makes excellent bus bar wire when it li Is straightened out DUL it be his tb the additional feature of hating baring A better conducting surface for joir radio frequency currenti currents tb th forms onas 1 I auw akl in i |