A Good Soldering Flux

Radio Record, Volume III, Issue 7, 30 August 1929, Page 31

A Good Soldering Flux

ANY amateurs who liye out of the convenient range of shops which sell soldering fluxes got up in handy iris are often puzzled to know the best type of flux to use, and also how to make such a commodity at home. For ordinary radio constructional purposes, there is uo doubt that one of the bast soldering fluxes is one which contains the following ingredients :-- Tallow ccccescceceveses 5O parts | Resin (powdered finely). 40 » Sal-eammoniac ..seeeseee 25 ae Olive oil ..... cececescese 5-10,, Gently heat the tallow and the olive oll in-an old tin container, and, when fluid, add gradually the remaining ingredients, which must be in a powder-~ ed condition. Do not overheat the mixture, for too high a temperature would cause the tallow to be¥ome rancid, but stir it continually with a stick until all the ingredients of the flux have become intimately mixed together, Then remove the source of heat, but continue stirring the mixture until it solidifies. The flux will now be ready for use, and it will keep indefinitely when stored in shallow tins in the usual way, Do not use too much of it when making 4 soldeved joint, A mere trace of it Will be all that is necessary. ~