Show Care in Avoiding Rosin Joints When Soldering If It n receiver tl I li Is to operate aid quietly It Is essential that all ot of the I soldered Joints be bo securely made Sol Is an exceedingly important operation In wiring n a receiver recel and T 7 soldering Is b doubtlessly a fre- fre cause of ot trouble In BatIlo least Magazine there are printed some timely on this operation special attention II drawn to the necessity of using good flux lux Time The ordinary solder of ot a combination of ot lead leatI and tin the per e generally being GO per cent and 50 W per cent tin says In order to make muke a 0 good goodJoint goodjoint goodJoint Joint the surfaces to be Le soldered should be entirely free from oxides s Soldering flux v III prevent the form forma lion lIou of ot oxides while hill tho the heat hent Is b being app lied The metal parts which are arc to tome toSe me e solden 1 should be scraped clean clenn before the flux lux Is applied and under Prof er conditions the solder older will sill low flow e very verv er easily around the Joint when the ther r r I l arts have ha been I 1 If tl e a soldering III If correctly done tIone time the holder solder rill III BI Di pear bright after aCler the joint Is made but a n foor f Joint made v a n cold Iron will III generally le lease 0 tl 11 e a solder with Uh a n some what crystalline structure Some lu lutes fluxes es be used sparingly In making the tho Joint as they vi III conduct electric currents on an I 1 will also have e muse nery a n very scry detrimental of et feet on nil any any Insulation y with Ith wl Ich they come oine ome In contact Rosin Is a very cry ex excellent clIent flux lux to use although It Is some some- somewhat somewhat what more to work or with than time ordinary soldering i asle ti d tc It Is stand ird practice lu In most large elec eke electrical electrical companies to use u e rosin 1 I ux ax ul al it alino-it t exclusively ely since Ince It I las has t no bad effects on Insulation Wl WI en ro rosin roain ln Is b lalie the flux lux It Is Important that nery a n scry ery lot I of Iron Iroll be used otherwise othen what shat Is 1 cull call d a rosin Joint may many be produced In which ca case e there thue Is a n thin thlu laver luer or of left between the two metal facts This Tills makes the electrical con can of ot time the Joint very elY ioor loor If It It itI I es Ls not hot completely i tr the flow v ot of current curn lit An As e It Is sd that ut time the Iron L Ie le I lot I ot If It n 1 nood job Jol 1 li 11 to 10 be done 4 0 1 1 I ut ot II lion on III also III In cares ca cn es eil I ire other r If It I Ij Is with in iii III n lint I 1 l-i l nut not hot liot It fu I a A t Lold LollI tl tI e a Irol on un thu tha metal for tor a long Ions time before the lie piece becomes su hot liot to melt time the solder snider and during tills this procedure much of time the heat energy nl Is wasted w Ith n a hot Iron the heat although more Intense Is confined to a smaller space because the Job Is completed quickly ThIs Tills Is Important when hen we weare weare are nrc as ns an nn example soldering a lend Ind to a lu lug on a transformer In such sucha a ca case e It Is ts t's essential that the he Job be bedone bedone done quickly so as to pre prevent present heating the lug to 10 such an nn extent that the lead I d from the winding which connects In Internally Internally to the end nd of ot time the lug will viii not come |