Evening Star Newspaper, November 29, 1925, Page 48

THE SUNDAY STAR, WASHINGTON, D. (., NOVEMBER 29, 1925—PART 1. FIFTEEN Ml BY JOSEPH CALCATERRA, Noted Authority on Radio. Reproduction Prohibit All Rights Reserved | ed in to s s she <trument h: with { ternal and ex that setting posttion zives in ¥ satisfactory operatio When the unit. falls below TES ()l* R DlO EACH DAY give the desired ;mm»m volt ize control on the a double a switch that rnal switch on the a reading for volt unit or the “h(fl(: that the voltage of ich unit can be determined. Control inst such” as volt- | meters are unfortunately in that class fof ins' ments that are not absolutely to operate the set and are, . often omitted in the inter- | cost of the expense -ation HEEUILY RADIO EXPORTS GROW. «h.uu.nw the in-| connections, to|Are Only Forin of Electrical Equipment to Show Gain. Radio apparatus was the only form equipment that showed | any substantial increase in the ex port tigu of the United States in the past nine months over the cor- responding period of last year, ac- cording to statistics ms lic yes- at the Department of Com Al electrical goods for! amount decrease noted in Jods during three. l}u:ll((lfl of a r period, were almost llu\lhlc the total xports of the same nine months of last ves |COOLIDGE SPEECH ON AIR. WLS to Broadcast Address to Farm Federation. sorts of the first nine months of 19 ed to $63.031 slight from the tot 81 President Coolidge’s opening of the Ame Chicago Decen by WLS direct from xhn Hotel Sher tlon of beir tend the Receivers' Licenses Gain. otal of 64,682 licenses issued in Canada during the fix onths of t receivers’ 403 11th ST. N.W. Great Removal SALE! vears of faithful service, coupled with good prices, and on January lIst we When it present quarters, above). anti delphia. TIn the mesz are moving to our new is opened up it will be the we have outgrown our store at 409 11th St. largest radio store south of Phila- e we are cleaning house Wonderful Bargains for Monday and Tuesday Only Radio Corp. and Cunningham Tubes Special “Charger” and B Battery $18.50 Reg. $6 95 “Karas” Straight Line Frequency Condensers .0005 85 23-plate .68 Bulb Extra “Steinite” Long Distance Crystal Set $6.00 Heavy duty Storage Battery $Q.95 $10.00 “Loud-Speaker Units” For Victrola or Horn $9.75 “Voltmeters” 0to50 . 29c 3 for 6 volts : led Fully Charged Coup Amplifier Very Special Test your B Battery “Eveready” B Batterles Large 45-volt... $15 “Daven” Resistance 102 $2.50 “B.M. S.” Vernier Dials “Ballocon” Coils For Radio Frequency Set of 3 $3.85 $10 “Manhattan” Loud-Speaker Adjustable $4 2 Unit == “Brandes” Phones 9 5c oo AN $2 =59 ..$1.28 5245 | $12.00 Reg. “Burgess” Dry Cells Trickle Charger $°7.95 g i oo John Smlth and His Radio BY }RPDFRI( K C. RUSSELL throughout the world have followed John Smith in his daily motoring—and have benefited thereby. Now he has taken up radio, and is willing that his low fans should be amused and profit b]/ h.xs evening experiences. Smith has a faculty for “finding out things,” 1/ lll” pay radio devotees to follow him in The Sunday Star (‘flL'L Car ouner: | with the idea of making them fill ‘low 1 loss’ requirements. only some are more successtully designed than others. With Condensers we a lot of progress the varfable type, and it can be safely sald that all the good ones now arc of the ‘low loss’ been accomplished by 0. 41—Puzzled by Low Los ¢ so often Smith becomes dis and jum; doesn’t k radio. That u he is making g This time it wa: loss.”” He had see plied to colls, transformers and con densers. It was in rudio artic and the advertisements, but meant absolutely nothing to him cept another radio puzzle. Smith betng dent of radio, | d of one of | this latest Progress “They have n with condensers The dielectric material used to separate the working but it is ob- nducting ability of the dielec s far from ideal. That is why thi to build condensers and tml\ with ‘as little dielectric as Smoth, ad; b ]H\! & B ter of efficiency | They put in a private office and in close you in a partition to be sure that attend to business, but now it occurred to me le to take some ¢ loss’ design and de- telling me wherein it average design of ra bu might bject of ‘lo be it to me, from the 1d when that happe fiss Whozis to read back notes so_that you wiil When this sort have to ask | through her very simple subject and vet | know lcated one.” Brown ex-| : | distant station vou {60 clearly c plained ow loss’ simply means | the ability of a radio unit to do what | or there is a lot of interference. Even if they shellac a coil it loses its ef- it was intended to do without branch ing out into a lot of other activities. | fectiveness ictance because ind your job, by way WhichSlafauto ou spend too much time | m ng golf or liste, to the mid-| Smith decided that this was s ht jazz ofythe ethe the hoss can | enough, but he had ire ‘that vou're in the ‘high loss'| other side of the que: category. Tell be looking around| “A thing that for a ‘low ' man, one who can|have andle his job without allowing too | in much of his energy to leak off in too | sign doe sther directions. be careless in tunin ide oil in a recelving set is|tact, with the unit that to the business much more efficie pens star 1to n Would You Like to Build Your Own Set? A Clearance of Radio Oddments Phon ¢ $1.75 39¢ . 8395 LANSBURGH&BRO 7th to 8th to E—FAMOUS FOR PRACTICAL GIFTS SINCE 1860—Franklin 7400 For Christmas A LIGHT SOCKET RECEIVER YOU CAN AFFORD DERFSNADYNE 111 is the first light socket receiver at a moderate price. It is the su- premely fine receiver you expected to buy years trom now—yet you can afford it this Christmas! Deresnadyne III is installed simply by plug- ging into a light soc’ . It is equipped with per- manent, guaranteed power units which supply all current from the lighting circuit. It requires no attention and operates by the turn of a single switch. With this convenience is combined the Deresnadyne’s performance, unequalled by any other set. All equipment including speaker is enclosed in the cabinet. You have nothing more to buy but the aerial. See Deresnadyne III at your dealer’s today. Price complete, including matched tubes, $285. Al Deresnadyne 11 for sour present equipment, $125 cAndrews .Deresnadymn Radio Recewmg@ ANDREWS RADIO CORPORATION -+ 1414 S. WABASH AVENUE + CHICAGO Dn!nbmed by Robert C. Rogers Co.. 1223 Eye St. N.W. District Office: Borden & Moynelo, 1336 New York Ave. s J. FRED HUBER Authorized Deresnadyne Dealer Demonstrations Cheerfully Given Satisfaction Guaranteed 1222 G St. N.W. Franklin 5580 In_you can hear through the s you | t to hear the| radio fan will find that he will be going right past the critical points where the fine results would be had. His set would work better on the usual stations, but, trylng for the more dif- ficult ones without more headwork, he meets disappointment. “The ‘low loss’ business not only applies to the individual units, but to the relations between the units them selves. You probably have seen in-| structions for building sets in which tho advisabllity of having all leads as | short as possible was emphasized. And | perhaps you noticed that certain coils | had to be set at angles to each other | in order to increase their efficiency | and decrease the tendency one has of | affecting the other. “In the design of one of the new | colls a small magnetic_ field is pro- | vided. This is supposed to act as a| shield and to enable the set builder to | disregard the usual precautions against | putting cofls too near the fleld of an- | other. It is a sample of the sort of | thing that is going on every v in | the work of improving radio receiv- ing.” Smith went home entirely satisfied that being puzzled by “low loss” cer. tainly was no loss for him. It cleared the decks for new conquests. (Copyright, 1825 by the Cllman Festure Service.) Next week, No. 42—The Grid at| Work. There is no varfation in ampli- | fication over the entire range of mu- sleal 1 ncles with Thordarson Auto- 00 1ow — 10 note is 100 hlxhwl»el'.xllynawllfledhymeAuwrvrmet THGRMWN Tvode-Mark Registered Autoformer amplification is for those who k the finest reproduction of programs to behad May boe used with any set in place of regular audio transformer hook-u directions. with disgrams, supplied with each instrument. Autoformers are $5 each. | THORDARSON ELECTRIC MFQ. CO. CHICASO HOUSANDS of listeners and over 200 leading broad- casting stations use Willard RADIO "B" WILLARD = RADIO BATTERIES Their job in your receiving |2 Thyre - sét is the same job they do for the broadcaster. 1. They last for years. They're easy to install. . They farnish the steady current that your needs to do its best job. set Sales and Service through The Willard Batter;r men and their Authorized Radio Dealers Give Her the Beaultiful Practical Gift of a “Free- Westinghous Electric Sewing Machine! —Iree-Westinghouse Electric Sewing Ma chines need no further introduction to \Wash- ington homekeepers. Nearly every woman has seen and admired the beautiful models offered at Kann's. There are no better elec- tric machines made. And there are no good electric sewing machines lower priced than “Free-Westinghouse.” As a gift, one of the models pictured here would be greatly ap- preciated. And to make it easy to give these splendid g A Liberal Allowance offered for any old machine you ma now be using, thus reducing the cost of the new one. Furthermore, you may pur any of the handsome models in our wholc assortment on the deferred payment plan of $2 DOWN Balance in Monthly Payments —is as¢ —Every machine is equipped with the fa mous Westinghouse built-in-head motor and is instantly transformed from a fine, quiet. efficient sewing machine into a beautiful and useful piece of furniture. Console, consolette and desk models are offered—their names suggesting the other uses to which they can be put. Several finishes are shown. You must see them to realize the attractiveness of these splendid gifts. Repairing of All Makes of Sewing Machines at Moderate Prices. Fourth Floor. “The Busy Penna. Ave.. 8th and D