Radio age (Jan-Dec 1926)

52 RADIO AGE for April, 1926 The Magazine of the Hour 100% Value From Each Tube What's the use of buying good tubes if you don't get theirfull value? Individual, automatic tube control is the answer. Amperite alone gives it. That's why it is specified in every popular construction set. Offers precision regulation — automatically. No hand rheostats to regulate. Eliminates all errors of human judgment. A special type for every style and strength of tube. Price $L 10. Write for free hook-ups ^^diall (Company Dept.RX-4,50 Franklin St..N. Y.City NS JB" Dept.RJ Jm 7he 'SELF-ADJUSTING' Rheostat Gets Everything But Noise/ Read this convincing letter from a man who has "listened and marvelled": "Grand Haven, Mich. January 25, 1926. Kane Antennao Co., Gentlemen: Received the Kane Antennae Saturday and by Sunday noon had it installed. Was pleasantly surprised at results obtained. Much more volume and selectivity. During European tests, the night of January 24, I had 3 foreign stations. When I omitted the Kane Aerial, I could not get a sound. P. M. Boeck." Improves Reception 60% Entirely eliminates all power noises such aa leaky transformers, generators, motor hums, Delco Plants. etc. Cuts static and regeneration howls and saueals in two. Dr. Gehrig of Oakland, Calif., tion fully 60 percent. Do away fo ill. (li able erecting this wonderful nd SI. 00 (a check will do. Stamps limited number available. Send TODAY. KANE ANTENNAE CO. Dept 820E 3343 W. Monroe St. Chicago, 111. Dealera— Send at Once forA ttractive Proposition KANE ANTENNAE ELECTRAD Certified Radio Parts Use the Log-a-Wave Chart on Page 64. Please Rosin Best Flux for Soldering Work FUNCTION of the brown jelly-like paste which must be smeared on wires before they can be successfully soldered is something of a mystery to the great majority of radio fans. They all know from experience that the molten solder will stubbornly roll off the wires unless some paste is employed, but as a general rule they possess not the slightest inkling of the real action the paste or "flux" performs. The paste itself does not make the solder adhere, but it does remove a little known agent which otherwise would prevent the soft metal from doing so, according to F. A. Klingenschmitt of the Sleeper Radio Corporation. This agent is a thin film of a chemical compound formed on the surface of the metal when the hot soldering iron is applied to it. The metal, under the influence of the iron's great heat, combines with the oxygen that forms part of the air, and its exposed surface becomes coated with an invisible layer of the new material, which is known chemically as an "oxide." This newly created film effectively prevents the liquid solder from reaching the actual surface of the wires being connected. Unless it is removed the solder will not stick, regardless of the heat of the iron or the quantity of solder applied. The hotter the iron, in fact, the more oxide is there formed. The specific purpose of the soldering "flux" is to absorb the film of oxide as quickly as it is generated. That's all there is to the whole affair, says Mr. Klingenschmitt. The paste simply combines with the film, the chemical reaction producing harmless substances which do not affect the soldering operation. Soldering fluxes take the forms of solids and liquids. Muriatic acid in which pieces of zinc have been dissolved is a common liquid flux, but it is highly undesirable for fine radio connections because it is strongly corrosive. Ordinaryrosin is the best flux for radio work because it does not corrode metalwork. Navy Operators Try Talking to Amateurs SOME of the sea-going naval radio operators have become too greatly interested in short-wave transmission and been censored by their departmental chiefs. The particular offense seems to have been in seeking to communicate with amateurs on short waves, which is forbidden. Although they may listen in all they please, on the short waves, unauthorized transmission would preclude the use of the vessel's regular radio apparatus, or at least interfere with the handling of official traffic. The ruling is "Prfvate transmission is not permitted from any naval radio stations ashore or afloat. Every ship of the Navy is considered a naval radio station. Every transmission must be duly authorized by competent authority." The only work authorized with amateurs is from the district reserve headquarters and by the laboratory at Bellevue, D. C. Shows how to get — greater distance, more volume, amazing selectivity, finer tone Science has discovered a new principle in radio amplification ... a striking new development that is bringing unheard of results. This principle is founded upon a new kind of coil — the Erla Balloon Circloid. It brings 4 distinct improvements. These are explained in a fascinating book just published and being mailed free. Edition limited — Write today Get this book and read about this newest scientific radio principle See the many different circuits in which it may be used. Find out how you can turn your present set into the latest example of radio engineering — and at a remarkably small cost. There are only a limited number of these books, so you must write immediately. Address Electrical Research Laboratories 2500 Cottage Grove Ave., Dept. 6-D. Chicago, 111 Enjoy splendid reception regardless of weather conditions. The Static Eliminator — 'the newest and most startling thing in Radio — -cuts out practically all static without loss of volmnel And in addition it will help increase selectivity, tune out local stations, sharpen signals, remove noises, lessen interference and prevent radiation! Use it with any receiving set — dimply hook rding to our simple instructions and peri. Satisfaction absolutely guaranteed — Money back it Eliminator Mail your Order JA 99 [hstptit t^ifJjii'liTl/, E» United Bank Bld&Cincinnati.O. YOU CAN GET Greater reflex BROWNLIE VERNIER DETECTOR $2.00 At your dealer or Direct. ROLAND BROWNLIE & CO. 21 S.inHcr. St. Medford Maaa. ition Radio Age when writing to advertisers