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About The Oregon daily journal. (Portland, Or.) 1902-1972 | View Entire Issue (May 21, 1922)
the ohegon suday journal, Portland, sundat uorntng, may 21, 1922. 5 Radio to 1 h ForecsMing Thundefc Storms DETECTION of approaching thunder storms la time to make necessary ,. a4jnstmenta in operation of electrle wrr ice Is a valuable practical us of the radiv according- to the report of the electrical apparatus committee of the Xetional Electric Light assocallion pre sented at the coavention in Atlantic cnr laat week. The radio also serves ; tot detect defects in electrical- apparatus aad equipment more efficiently than any Other jacency, the report says. iTChe entire radio art has reached an niAently practical and dependable stare." the report states. "Transoceanic telegraphy on a basis comparable to that f the i cables probably represents both the greatest investment and the most spectacular operation. The marine use of radio, including not only ship corn munication but also position finding- for vessels at sea. are also of tremen dous Importance. la Europe, wireless telegraphy Is coming- into extensive use , far inter-city communication. Some at tempts in this direction have also been Baade in the United States, V "The broadcasting- of new ' and . weather despatches, mnsteal and other entertainments, speeches and church services by radio telephone is providing ' a (valuable service to hundreds of thou .' : sands of listeners. Radio has also proved its importance as a wire line auxiliary in the railroad field. , Train dispatching- by radio has been accom- - plished many times, -and some far-seeing railroads have installed radio equipment : as part of their permanent plant.' - Many electrical companies are making vie of the radio. Communication be tween plants and substations, trans- ; mission in instructions to repair nnn ' along; the lines, and the possibility of the ' 1 uiui cvuifut m. iwiiuica ta.iv si veil outfits en antomobOes aad ' motorcycles Is) made where portability Is desired.. (A wide field for remote operation of : sabstationa and switches is opened by - the application of what Is known as , ise -wireo wireiess.- ("Not the least Interesting yoatgrowth of radiant-wave telegraphy.' says the ' 1 emti L . "la ttm mia af 1 tm nrln. ctnles to communication along- wires. It has been found entirely feasible to asso . elate s radio transmitter with' a wire eystem running- from one ' point to an- " elhF fma tHmitrh tt virjr wtn. bum! for power transmission) and to send along the wire a series of radio-fre- quency current waves wnicn may be . detected at the distant end by means of a simple radio receiver.' Such "wired -wireless," as the , arrangement Is fre- quentty called, permits considerable econ omy in operation, it is claimed tor this system that fairly clear telephone eora- tqunieatlon, la possible even with llght - eaibg storms over the main, line and with all bat one of the power wires cut f grounded."' t Y accum Re cei v e rs Are "Made Clear IVxttiam B. BuUm. rttJX. in TmtSm'm Waakls. f I There are two classes of raido reoelv- eva: 1) Crystal detector receive! which employ a crystal as the "detector" and are simple' and Inexpensive, but have a radiotelephone range of about 20 rntlea only: and (8) vacuum tube r . cfirers, wiiicn employ one or more A-acuum tubes, resembling small electric lamps, and which must be used to hear . stations that are more than 20 miles ' - away. tThh AlffHrm m air Mi thf vamvmw fn)ui : receivers are legion, and very few r cemble each other la appearance, but -nevertheless there are only a few basks types. These types, with their praernal characteristics, are given la the follow ir list, and a study of this list should enable anyone to select tho kind of re ceiver to suit his needs. I S1NGLK-TUBE RECfiTVKS w These receivers' have only a single tube ana are ue simplest ; sad least, ex pensive- of this class. Those of rood reaTrea have a dependable range, of about Mil IN STOCK We are distributors for - Radio Corporation " We tins house Electric ' Co. ' Remler Mfg. Co. t Cunnin sjham ' i" ; Pacent Electric Co. ' , Wrru J. Murdock - I and Many Others See New Areolla Grand Set I Now en Display EL.ECTRIC CO In Radio Business 10 Years 75 Sixth Street, Portland ceUsed pHIEF SHERjMAN CHARGING HAWK, -one of the - original developer? of die wireless system of communication, investigates the pale lace's method of radio. The chief jwas positive that the; radio-phone was. superior; to his old 'system-asmoke signals of the tribes which conveyed vvarnings of war and messages of I T ; What They Are and r"5y J. H. HalfeMk. K. X. AKTkiiNA One or more copper wires elevated In the air all connected to gether and thence to the radio lnstru meat. The antenna, may be likened to ute "reeier" or an insect. INSTJXiATOK Porcelain cr "electrose" U placed at each end of antenna to sees energy from being lost to ground, , VACTTDM LIGHTNINO ARRESTER. Xo dissipate to ground any "static dis chsrgs" from the clouds that might otherwise injure apparatus or building. UKTiSCTOR (Crystal or and ion) To chang the radio frequency to audio fre quency to which the human ear will re spond. DETECTOR PANEL A combination of audion detector socket, rheostat, grid condenser and grid leak ail the neces sary adjuncts to the tube itself.. VARIO-COUPLKIt a Brimarr or an- i tenna cou wttb variable tops, and a fixed rotary secondary coil with varia ble "ooup!lng- VARIOMirrER- Two edua. one within another, connected la series so that they may be made to vary the total induct ance from maximum to minimum with out sliders or taps. VACUUM OR ELECTRON OR AUD ION TUBE An electric lamp which, when heated to incandescence, trans forms the inaudible radio frequency to SO miles, but under favorable conditions are usually able to receive high-powered stations at distances up to 300 miles. i fiey receive clearly but not very loudlv "Loud speakers" (that is. sound-magni- rying corns) cannot be used with them. Prices range up to $75 for complete out fits of the best makes. TWO-TUBE RECEIVERS (One Stage of - Amplification) By using a sec- end vacuum tube, the sounds heard in a single-tube reoejver can be consiaeraoix amplified, bo that sages from nearby stations coma la very iouaiy. and those from high-powered stations as far away as 500 miles can be distinctly heard under favorable eon aiuoaa. Two-tab Instruments cost from 20 to 150 more than single-tub receivers of corresponding makes. They are not recommended for us with loud speakers unless used within a -few miles or a station. THREK-TOBB RECEIVERS (TWO stages or Amplification) - The third tub provides still greater ampllfl- cauon or tn messages, so that three tub receivers have a very wide range. Loud speakers can' be used with these instruments. A three-tube receiver of one of the best makes costs S2K com plete, Loud speakers cost from $5 , to S200 adidtioual, depending' upon the qual ity and volume of the so and. hnjLTI - TUBS BJDCsnrwRS Re ceivers of the - higheet grade have several Stares of amplifleatlon aad are often provided with bulit-ta loud speak- xoeuent mstrumeat can be pwchased tor jus. AX higher pries, re- wlth - phonograph attarhmwrita and "period" eabtnets eaa be obtained. CKIT RSCatrVgR3 .OUSial -munw faetarer apply reoeieia which can be constructed In uatta Ilk secUoaal book- A single-tub reoetver . is first purchased, and oa. two aad more Mum of amplification eaa be added as the purchaser desires. s, ; Benson Radio Ciob i. . At the last rerular meeting af tK. Season Tch Radio club a letter which was received from the A. R. R. Lv.wes read to the club. It stated that a relav is to be held June 4, S and 4V which la "Fifteen Years in Radio9 ' HALOWAT HALLOCK & WATSON "RADIO SERVICE?' Radio, Telephone and - ' N i Distributors for NOKTHWESTJERN RADIO MANUFACTURING C02DPANT J. It HALLOCK. formerly TBo C. H. WATSON formerly in , cnscUon emgnwer. U. S. charts U. - SL Naval Radio Navy and Federal TeL Co. , Laboratory, Mare Island, CaL , ; r ; Operating Stations KGG and 7X1 "J : 192 Park St, Portland, Oregon, Main 5677 :i It -yy What They're For audio frequency which may be heard. ! AMPLIFIER An aadioa tube, socket; rheostat and bridging- condenser so con nected to an amplifying: transformer thai it will amplify the signal which the detector has made audible. '1 VARIABLE CONDENSER A number of metal plates rotating inside a group ox xueed plates, so that the capacity'? may be varied from minimum to maxi mum by turning! through an arc of 186 degrees. -' i ; - i '.- AAIFLLFXER TUBE An audlofl tube with high degree of vacuum Chard tube)i on wbfeb a plate voltage of 45 to 100 volts la used for amplifica.tioa of several fold. 1 . .a :-: r I ; DETECTOR TUBE A sort tube (low vacuum or "gas contend) which em ploys from 15 to; 40 volts on plate, used for rectifying' only, ,-r.iit t i "A" BATTERY Six vott storage batt tery such as the ones used in autoa. . lit Is used to supply a low voltage current toneat the filaments of all tubes and to energize the "MagravoA" when used, a BA riBii ury oeu battery such ae used la flash lights made up la i a unit of Z2 or 45 volts n amber of small cells incased in wax, As the load Is very smali, these batteries will last for sax months to a. year, depending on the amount usea. : i: to relay a message to all police chiefs in the United States, Javltias them to the police chiefs' convention ) to be held in San Francisco. All the members , of the club were asked to I participate la the relay aad help forward the message. The message is to be started off by Aug ust Vollmer aad is to be relayed by spark, CW aad poseibly by phone, aad is to be both 200-meter land , S7S-metet wave lengths. The message will com some time between 10 and 11 a ra, Faj clflo Coast 'time. ' Full' particulars art to be had in the May Issue of the Q. S. T., the official organ of the Azaerf ican Radio Relay league.' ? " ( . . As a part of; the dub's radio set Is Incomplete the committee In charge of the construction of the set was not dis missed. The , dub plans to tnstaH it L K. w. set early next term. , A aa Indication of the growing- pop. cuanty or tne radiotelephone, a real estate firm of New York announces that it will wire several apartment houses for this service.' Th builders say that it will be, better for them to erect one aerial for the use of all tenants than to have th tenants erect Individual aerials. A building contractor of Phil adelphia also announces that building being erected by him are to be wired for radiotalephon serric as part of the regular equipment. : Sstacada. Or- May SO- "Ted" How, son of Mr. and Mrs, F. C. Howe of this place, and only It years of age. has in- staued a radio- set and with It was to - enjoy one of th onttre radio programs from Portland last night, H also picked up several ninani.ii from elsewhere aad expects to get art the rrna tomorrow alarht. Toaag Hew is th operator at th local picture theatre and Installed the radio set with out outside assistance. - - , . . I Cealralia. "Wash. CaatraSa ' radio Cans will meet May 23 at th aew com munity bouse for th purpose of reor- ganialng a radio dun. About 40 Ceo- tralians hav thair individual radio re ceiving' sets aad . many - mor plan ! to make a study of radio with the club. Officers will be elected at the raeeOna ra the commasity house; The meeting was called by E. F Vaa Schoick. secre tary of th Chamber of Commerce, I Telesraph Equipment Electron Tubes xn did Battery RADIO receiving apparatus that uses -fx ordinary electron tubes for amplifi catloa, -but which does - not require a storage' battery has s been developed by the radio experts of the bureau of stand ards, the Washington Herald says. - It The current ltd light the .filaments of the electron tubes is obtained from an ordinary electric lamp socket instead of the storage battery ; which th experts characterize as "a drawback to the gen eral use of radio seta and the most ex pensive portion of the equipment for the person who wishes to make , his own set." : ll . - iHow to ase ' the electric - light wires emselves as an antenna and thus elim inate entirely the need of erecting an antenna has also been worked out by the government radio engineers in con nection with ! this new: set, ; although the signals are likely to come in with less strength wnen tins is done-, Tne new design of receiving' set can be used, how ever, with any type : of antenna, . either the j ordinary j elevated aa tenna, a coll Or-special forma. f i:;'" . j- I "The new receiving set consists : essen tially, of an amplifier with minor auxil iary parts." the experts explain. ; "The amplifier: utilises to-cyclo current supply for both filaments r and plates of the electron tubesi . The amplifier has three radlo-frequenay : stages and two audio-4 frequency stages, and uses a crystal de tector. The SO-cyclo current when used in aa ordinary amplifier circuit intro duces a strong 00-cyclo not which offers serloos interference, ji This has been prac tically eliminated by balancing resist anoes. grid' condensers and special grid leaks of. comparatively low resistance, telephone transformer in the output cir cuit,; and crystal detector, instead of electron tube detector. In the final form of the amplifier, there is only a slight residual hum which: Is not objectionable. The amplification obtained with a. e. mipply was as good as that obtained with the same amplifier used with d. c supply. The: complete unit is Ughtj compact and portable. . For the reception of damped waves, the amplifier as constructed op erated most satisfactorily for wave lengths- from) 200 , to 750 meters. This range was determined by . the. working range of the radio-frequency transform ers used. By using: . suitable 'radio-frequency transformers, it is expected that the amplifier will be effective for the re ception of damped waves and undamped waves: as long as 10,000 meters. For the reception of undamped waves, a sepa rate heterodyne should be employed," i A publication of the bureau of stand ards to be issued shortly: win give cir cuit diagrams and state the values of the ; condensers, ' reslsters aad inductors used. .r .i Ji. -'-. . .. ;-u;;... ; Many Towns Ready to Install. Sets Washington, Mayi 20 (TJ. N.) Tims ' was when the village held Its carnival to buy a motor fire engine.: Time will be when the village will hold its carnival to buy a radio telephone broadcasting set. I Th department of commerce's radio - division expects - to - do i a flourishiag business as soon as the1 radio law Is passed in granting- licenses to comrmrol ties in the country districts out of the direct une of communication with the larger concert broadcasting stations. j For a long time to come, it is pointed outy the radio phone broadcasting i roost necessarily h a ferg corporation or ' community property because of its expensive&es. .The average broadcasting- outfit costs from 80OO to $10,000, ! when bought outright from the large radio corporations who make a specialty of manufacturing broadcasting seta. Ob viously this is beyond the reach of the average amateur. H must content him self with a sending license for cod sig nals.. And speaking of cod transmis sion, up in Kockville. Maine, there is a community set which broadcasts news in code signals to Swan Island, several miles away.; in plaos of a telephone cable which broke down some time ago. -1 Not only because of its expensivensss with the radiophone broadcasting outfit b a community affair for a long time to come, but the very nature of broad- easting' service Implies community use. Just as soon as a community can get enough funds to buy! a set. the depart ment -will grant it an i amateur's li cense which will enable j the town ao thorities to hold-their concerts and to broad east them to every citizen within the town limits. And this sort of broad casting. It la understood, appeals par ticularly to the radio division because the olflcialfl believe - that th radio- phono's greatest usefulness aad greatest opportunity for service, lies In the neigh borhood of Main street. , -.:.' -t -fi At present the . radiophone vogue - Is largely a big dry proposition, but ex perts her contend that this is only tem porary, that inevitably the radiophone will seek its own level, iand that level is th country town, f " ? M The community broadcasting idea la entirely feaslbl and desirable, officials believe, because it does not create any ooaalderahl Interference, and under the new law, will probably operate j on a low wave length j of 160; meters, i This wave length will be ample tor th cop Of th small community, i . 1 Torkvin. Ohio.! May UFir Chief A. F. Malasky wants to speed cp his vohmteer members of th local Cre tlchting Idepartmeat. . Accordingly - he has decided to install a wtieleas phone receiving set ra the vfllag bnHdms; Aa amplifier, he announced, will be at tached s that the firemen may hear conoerts, sermons, etc. - broadcasted from Pittsburg. Chief Mstsalry expects ihe plan to result In mor of the volun teers loafing about th municipal build ing, making them available for quicker action when aa alarm Is sounded. I Ecio. May 2oAXr. A. Q. Prffl Is Instal ling a 'radio receiving' station witha radios of 2000 milea. This, when com pleted, will be one of th Jbeet stations In Z4an county. u i..n . . ,i-t-; m l ; sm-ft.-- rr, " :r '" : i V: jLanouncement by " the Hood River American Legion post that radio con certs will be a feature of th second an- troal Mt, Hood cUjnb,- has created a surprising Interest, according to Kent Shoemaker, 'chairman. Th Lesion Mt Hood climb,' as the ascent has com to be termed, launched only, about a month In. advance t of the . 1821 event. : was a JvrVTi Mail Oi-rT rniswi J"'1 111 ' SM j J. Complete '4 I, . Line. j J CHOVN HARDWARE CO. 147 4th SL . brilliant succesaj Despite , th short notice last summer: more than 150 par ticipated in the campfire stunts, and refTeattontsta. including -Oovemor Ol- cou and Secretary of Stat Koser were led to the summit by veteran guide Hark Weygandt. . Instead of th rtwo days that are now being devoted to th climb. It la proposed to open the camp tn the future for a week or .more and Include In th acU-riUes skiing and othep snow field sports. County official havx pressed a willingness to aid la the de velopment of the plana. 'The event will be extensively advertised in Portland by a Hood River Legioa-comnritte prior toLth' .ascent' C th- mountain,; -.t.fctrl. Radio; Work of HGrf3atest" Bale A KTOKK who has listened la on a xl radio set during; the approach 'Of a thunder storm has little new to dis covert in the way of frying, hissing, bub- pungi aad sputtering noises. -I It la only natural Xor th listener , to wander where they U com from. , . 3: f i -? In, general there are Just two kinds ox raoio noises--tne ones tnat can t be 'avoided aad the ones that ctA. In the first class are all of th nataral ones that' result from electrical disturbances la i th., ether, through which all iradl waves travel. , - It must be remembered that these waves follow! the same laws aad behave in exactly th same manner as th waves created "to order"?; by man made machinery. ' :r V . -j 4 . The second class of noises is the result of faulty wiring, or In many-case Im perfect or Improperly constructed bat teries. Wire must b tight. It is for this reason that so many t who build radio sets take special car to solder all joints - even though binding r posts pro vide a seemingly tight grip on the wires. ;To a great many people a battery is just A battery, and need only be consid ered ' from a standpoint ' of voltage and amphere-hour capacity. I It is true that these things are of prim importance, but there are other features of construc tion deserving of far more attention than Is commonly given them.'" 1j: f -i1 i An Important feature of 'the "B" ; or 24-svolt batUry' for example, ts that It must be able to hold Its charge for long periods not jonly - because of economy, but because electrical leaking from, cell to cell or from positive to negsUve posts of any particular cell is distinctly a noise producer. It is to prevent this dis turbing effect that a nationally promi nent battery company has developed a formof "Bf battery la which each, cell Is a glass jar capped with - a special screw top and separated from its neigh bors by compartment partitions. It is said ; that the leakage and consequently the possibility of "B" battery noises is practically' elirainated. h - u t Vancoaver, Wash. Music from Los Angeles has beet) heard in the home of B, M. Mumford in Kast Vancouver over a 1 radiophone using a crystal detector. The Mumford radiophone ia one of the best equipped private instruments ia the city and is the work of Royal Mumford, the ; eldest . son. although Harold : and William, younger 'brothers, are both licensed commercial - wireless operators. The Mumford boys began experbneatlag with wireless telegraphy in 1)14. and with simple parts picked up at different times and connected with water pipes evolved an Instrument that would re ceive wireless:: messages. When) the United 'States entered the war Royal en listed at one and was sent t the naval : radio school at Mare Island. He i was assigned . to the transport I Walter -: Q. Luctten&actt as wire less operator and maae tnree trips across to Europe, celvlng his discharg as fc wm starting oa tn zourta,. . Washington t Stat Collece. i PnXhnan. Waah- Tbe 'establishment of a. radio broadcasting outfit at the Stat college or Washington has been proposed by the Pullman Klwanla clubhand efforts are to be made to interest other Eastern Washington clubs in the proposed ven tur. - ; ; . ' t ''' There win be a great advantage lh the excellent opportunities afforded at the college in sending ' broadcast to more than 20,000 receiving" sets in th state. An unlimited field presents Mself la the sending out of concerts, musical - enter tainments of. all kinds, lectures by nsv ttonal authorities and local oollece ex perts. rTher are at present over 0 amateur radio stations in Pullman and many , of those, are equipped for "tak ing" lectures, 1. musical entertainments. news and other features sent out -from stations . throughout the West ! Many - local ; citizens are Joining th student;, radio bugs" in their deep In terest. in' this fast-developing science. " v ' - i - - :' ! i The American Society of Com nosers. Authors and :i Publishers was recently advised by Its counsel,. Nathan Burkan, New Tork, that -ia his opinion the per formance of copyrighted . compositions over-the radio constitutes a publlo per formance for i profit It therefore f falls withia the class of performance-for th privilege of which the copyright owners are i entitled to a revenue, Mr. Burkan states. ; The society is said to have warned mlt broadcasting stations 1 that any Infringement may be the subject of prosecution. ' The organisation tis now arranging f or th assessment of a per forming rights tax. - -1 On of the radio freaks of Seattle is a radio bicyel built by John Adams, i 14 year old high school, boy. : An ' antenna is rigged on the. handlebars, the tanlag coil, wound on an oM cylindrical phono graph record rand wired to the handle bars and th rest of .the apparatus: is secured to the frame of the blke By the use of a trail wir Adams forms his ground and is able to listen to -on radio broadcasting J while merrily ; Jogging along oa his blcycl, - -- . : HO AERIAL HECESSAEY ! Th Wolf Aerial attaebmeot abtas eaa to noact to bt eteetxas Usht soekat aad maeSve m sad aass (run the sir with , tout R.mm fUeetrteuf set. gave east, ef all aerial- censtran tkm. - Ho esanr esd -fsohmof. --Th attutfa Bwat comas raady to aaa, Jast soasect ta ierJal poet ol tartar aat. ,:.L-- MTwr s-aaraaieaa, r rnea poatpaid. TNI woir udm iMMia " ; Sonera aioW- ' -i- OetMW.' anoh. Battery We are receivihigr reffiilar shipments of complete !AM and parts and can now offer immediate delivery of items needed by the amateur; IJ. J. VALSH ELECTRIC CO. 106 Fourth St, Bet Stark and Washinirton Navy Declared Supreme in Its ; Radio Stations ivhvJ - I1 Washington, ilay iO. L N. SI) De spite th maulings" It "has "received at th; hands of the armament, conference and .congress, th United - States navy stands supreme today in on respect, at least its system of high power land sta tions for radio- telegraphy is the most complete of all the naval establishmen ta. The navy's station at Arlington, as-signed-a -wave-length of 17.145 meters, is one of th most powerful in-the world. Operated , by remot control, by . meant ef keys In the navy building- her, the Arlington station is depended upon day in ; aad - day . Out to' transmit messages over a radius of about 6S00 miles. This rang includes the extreme eastern end of the 'Mediterranean sea; and the -same territory also: can b reached from the opposite direction br the navy's Philip pine station - at 'Cavite, which, operates n ! 13,900 meters, - -1 . Among the navy's larger units south ward of the great Annapolis station are the sending . plants at"; Cayey.' Portol Rico, using a lOHO-meter wave, and th station at Balboa, . canal Zone, sending on j 10.110 meters, Th eastern portion of the Pacific is covered from the con tinent by a station at San Diego. CaL, and another on Puget sound, the former using waves of 0800 meters and the lat ter: waves of ? 100 meters. ."OV In the Hawaiian islands the navy has two sending stations, one using lLSOO meters and the other 8875. The navaU station at Guam, which send oa 9145 meters, and the 11.900-rneter plant in th Philippines, complete the navy's net of i radio stations around the world. Wherever Its ' ships are, likely to cruise they nearly always will b within rang of 1 th dots - and - dashes from one or mora, of th navy's sanding stations., i The Lafayette station near Bordeaux. France, using the- longest waves 23,000 meters conceded to be th most power ful radio station in the world, was built by! th United States to facilitate Amer ica's part lai th World . war. but has since, been sold . to France.! : Its broad casts are transmitted with ease over the 4000 miles of water and land that sep arate Bordeaux from .Washington, ai)d occasionally it has been' heard in French Indo-Chlna. 600 miles in the east -' The commercial station recently opened oa Long Island, r usin 9 the second - longest wave . in use, 19,000 meters. Is expected to challenge the Lafayette station's title to first place when additional units are added. - The Long Island station Is used for transmitting messages'to Germany, about 4000 away, - ; i .-. The British navy, ' time honored mistress, of 4 the seas," in direct con trast to the American -navy, does not maintain a system of land stations of Its own. bat uses those of the British post office. - Though thes postal stations practically encircle the earth they do sof in much smaller "Jumps' than those of the United States navy aad therefore use less powerful stations. -: Seven of th IS longest-wave stations which '- follow Annapolis : axe In the United States -or its territories. They are commercial stations at Barnegat. N; 14,800 - meters ; St James, Long Island, 1.43 ; ' Kohuku. Hawaiian islands.- ICS 00, and Tuckerton,. tf. J, 15.JO0; th nary station at Cavite, Phil- ippin islands and commercial stations at Brunswick. N. 11,600 meters, aad Bolinas, Cal 13,810 meters, Numerous United States ; army send- Iiur, statlens. operatinsr on wave lengths from a few hundred to 10,000 meters, are v scattered . over - the - country. The postofflea department, at its several sta tions, sends on waves for the most part between looo and ooo meters long. ;HarrisburgV Pa--My 20. TJ. P. dally radio broadcasting servica for fhe farmer of Pennsylvania, whica Will in dude Pennsylvania market reports and other agricultural tafornrntloa. has been Yariocouplers $2.50 - - Latest i Variometers . Grid Condensors . .Aluminum Sockets SI KTECiAi parts BtrriT Ton xsr H SET I Hi M. H. Electric Co. j ) 31 N. FIRST ST. jBrOadwax leU - - PftrUasd. Oregon ADIO IJUCEplATK DEiaTEBIES - HIGH-GHADE BABIO AEPABATCb A3TD SUrriilES Acme ; Products 11$ CHiXBEB OP COXHZSCX 1 .! : f an m tJ eUeettiaf set eealsletelj tattall, -M-:-- . - la Tr.aai. " - l J uuaraateea u new an nie Locur cm tics sting. a.uaic and JNews. i ttl n 1 . BS lit- . Sit Oraad Ave, ITear B. Jlala t k East Kf4) k --v '-!;bs. 7bb Jlala tm Itadio Farts 11 " - : m planned by i th Pennsylvania ' depart ment of agriculture and : th : Pennsyl vania stat police, -i 4-Cv -3i': i ,-Kr;vi The, eervic wUl be iastltttted some time .: this : month '1 and will , coatinu throughout the year. - General plans for this service were arranged at a con ference between Secretary of Agricul ture Fred JElasmussea and Mayor Lynn G. Adams., superintendent of th' stat police. " , ' . - Th i Pennsylvania stat 1 polic now hav Installed , at Harrisburg a ; radio broadcasting station. that Is on or th most powerful In the United States. The station will,: each evening at a specified time., broadcast agricultural laformatioa throughout ' ; this - aad - adjacent atates which will be Of value to the farmers. --. This' broadcasting service will prove of tremendous value," said ' Secretary Rasmosaan. : Tt: wllf prevent' bur farm ers from rushing their products to mar kets that ar glutted, will tell them each day where there Is th greatest demand for their products, aad will generally aid in solving marketing problems.' ' i" ::-.'"'A ! . f-': ;.!. : ---g'-l j .j, N:-." Eugroe The application Of tr. Si XX. Donahue for permission to string radio wires from his dental; offices in-i the Zum wait building across' th street was denied by the city council Monday eve ning upon the advice of O. H. Foster, city attorney, who believes there is dan ber of too many radio wires becoming a nuisance In Eugene. ' n. . limz it? f t . , . COVPZ.BTE STOfsr AUDIOK TUBE SETS TOR IKKEOIATR BKX.ITEXT COMPLETE WITH - "MAGNAVOX" , -' Complete Iastailatlea If Desired , Call . Us for Bsameastrattee Ei L. KNIGHT & 44t WA8HIXOTON STREET-. BSAlaW AT 141 "KSIGHT MAKES BAT Immediate Deliveries ; 0f Bei5t;JGra , Iffci , . . . We Are; Specializing; in Installing: Sets , , n - , FOR FARMS AND INSTITUTIONS ' with, a miarantea of. satisfactory reaulta. j Alsoi portable outfits for camping'. Ti::scv.rf" y':M. We welcome inquiries for such- equipments and can give immediate service on sets covering' any desired range. n r - r - RADIO SERVICE BUREAU ,717 GASCO BLDC. f. MAIN 453S ( PORTLAND. ORE. Brant-Reed Radio Mfg. Co. - THE SUPER DETECTOR A new idea in detectors 90 per cent better than any other crystal. ! Vibrations seem to make it more sensitive. Price $2.50 ! t Matt Orders FiUed. i. . . l'r For those that desire a high-grade receiving set, we have a few com i,' Plete ones at $60.00 to $250.00 i i. 86 Bwdye, Bet Stark and Oak. Bdwy. 8089 RADIO .DEALERS We Have for Immediate Del ." i' ;r' i-; v, i :'(: Kadlio PirbidlTLtfctbsi . in ropuiar iemana Let Us Requirements ': f" : '" . : ' ' - .'- - -.jT'. ... 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