Radio Digest (July 1924-Apr 1925)

■ August 2, 1924 RADIO DIGES T— Illustrated l-J Radiophone Broadcasting Stations Corrected Every Week — Part V State, City, Call Alabama: Auburn, WMAV Birmingham. WST Mobile, WEAP Montgomery, WKAN Arizona: » ___„ Phoenix, KFAD. KFCB Tucson, KFDH Arkansas: Conway, KFKQ Fayetteville, KFMQ Fort Smith, KFOZ Little Rock, KFLQ, KFMB, WCAV Pine Bluff, KFPX California: Bakersfield, KDZB Berkeley, KRE Burllngame, KFNZ Culver, KFQI El Monte, KTJY Fresno, KMJ Hillsbourgh, HFQH Hollywood, KFAR Holy City, KFQU Long Beach, KFON Los Angeles, KFCL, KFI, KFPG. KFPH, KFQG, KFSG, KHJ, KJS. KXX Oakland, KGO, KLS, KLX, KZM Paso Robles, KFNL Richmond. KFOU Sacramento, KFBK San Diego. KDPT, KDYM. KFBC San Francisco, KFPV, KPO, KUO San Jose, KQW San Luis Obispo, KFBE Santa Ana, KFAW Santa Barbara. KFHJ Santa Rosa, KFNV Stanford Univ., KFGH Stockton. KJQ, KWQ Taft, KFQC Whlttier, KFOC Colorado: Boulder, KFAJ Colorado Springs, KFEL, KFKZ, KFQE Denver, AA3, KFAF. KFKH, KFLE, KFPO, KLZ Greeley. KFKA Gunnison, KFHA Manitou. KFQS Trinidad, KFBS Connecticut: Hartford, WDAK New Haven, WPAJ Storrs, WABL Wilmington, WHAV, WOAT District of Columbia: Washington, WABE, WCAP, WDM, WIAT, WIL, WMU. WBC Florida: Jacksonville, WABG Miami, WQAM Pensacola, WGAN, WLAV St. Petersburg, WCBR, WDBI Tampa, WDAE West Palm Beach, WBBJ Winter Park, WDBO Georgia: Atlanta, WDBE, WSB Columbus, WDBA Macon, WCBW Idaho: Boise, KFDD, KFFB Kellogg, KFEY Wallace, KFOD Illinois: Belvidere, WOAG Cambridge, WTAP Carthage, WCAZ Chicago, KYW, WAAF. WDAP, WDBY, ,WEBH, WGN. WJAZ State, City. Call WLS, WMAQ, WQJ, WTX Chicago Heights, WCBZ Decatur, WBAO Elgin, WTAS Galesburg, WRAM Joliet, WWAE Lincoln, WBBM Mattoon. WQAL Monmouth. WBBU Oak Park, WTAY Peoria, WJAN, WQAX Rockford, KFLV. WIAB Streator, WTAX Tuscola, WDZ Urbana, WRM Zion, WCBD Indiana: Anderson, WEBD Fort Wayne, WDBV Greencastle, WLAX Greentown, WJAK Harrison, WCBN Indianapolis, WBBZ WSAL Laporte, WRAF Marion, WIAQ Mtshawaka, WOAO South Bend, WGAZ Valparaiso, WRBC West Lafayette, WBAA Iowa: Ames, WOI Atlantic, KFLZ Boone, KFGQ Burlington, WIAS Cedar Falls, KFJX Cedar Rapids, WJAM, WEAA Davenport, WOC Des Moines, WHO Fort Dodge, KFER, KFJY Iowa City, KFQP, WHAA Lamoni, KFFV Marengo, KFOL Marshalltown.KFJB Ottumwa, KFJL Shenandoah, KFNF Sioux City, KFMR, WEAU Waterloo, WRAN Kansas: Anthony, WBL Beloit. WPAR Iola. KFlD Louisburg, KFJX Manhattan, WTG Milford. KFKB Peabody, KFNX Russell, KFQO Topeka, WJAQ, WPAM Wichita. KFOT, WEAH Kentucky: Louisville, WHAS, WLAP Louisiana: Alexandria, KFFY Baton Rouge, KFGC Franklinton, KFLD Jennings, WCBJ New Orleans, WAAB, WAAC, WABZ, WCAG, WCBE, WDBI, WEBP. WTAF, WWL Shreveport, KFDX, WGAQ Maine: Bangor, WABI. WDBN Houlton. WCBL Portland, WTAJ Skowhegarj, WDBU Maryland: Baltimore, WCAO, WCBM, WEAR Massachusetts: Boston, WDBR, WNAe, WTAT Dartmouth, WMAF Fall River, WSAR. WTAB Lowell, WQAS Mattapoisett, WBBG Medford Hillside. WGI Springfield, WBZ State, City, Call Taunton, WDBB Worcester, WCBT, WDAS, WDBH Michigan: Ann Arbor, WCBC Berrien Springs, KFGZ Dearborn. WWI Detroit. KOP. WCX. WWJ East Lansing, WKAR Flint, WEAA Houghton, KFMW, WWAO Kalamazoo, WLAQ Menominee, KFLB Mt. Clemens, WABX Petoskey. WBBP Port Huron, WBBH Saginaw, WABM Minnesota: Hutchinson, WFAN Minneapolis, KFDZ. KFEX, KFMT, KFQF, WLAG, WLB Moorhead, WPAU Northfield, KFMX, WCAL St. Cloud, WFAM St. Paul, AV7. KFOY Mississippi: • Coldwater, KFNG Hattiesburg, WDBT Oxford, WCBH Pascagoula, WCBG Missouri: Butler, WNAR Cape Girardeau. WSAB Carterville, KFPW Columbia. WAAN Fayette, KFQK Independence, KFIX Jefferson City, KFPN, WOS Joplin. WHAH Kansas City. WDAF. WHB, WOQ Moberly, KFFP, KFOJ St. Joseph, KFHD St. Louis, KFEZ, KFQA, KSD, WCK, WEB, WEW, WHAT, WRAO Warrensburg, KFNJ Montana: Butte. KFKV, KFLA Havre, KFBB Helena, KFNY Missoula, KFLW Stevensville, KFJR Nebraska: David City. KFOR Fremont, WOAli Hastings, KFKX Lincoln, WFAV, WJAB, WMAH Norfolk. WJAG Oak, KFEQ Omaha. KFCZ. KFFX, KFOX, KFQV. WAAW. WIAK, WNAL, WOAW Tecumseh. WTATJ . University Place, WCAJ Nevada: Sparks. KFFR New Hampshire: Chesham, WSAU Laconia, WKAV New Jersey: Atlantic City. WHAR Camden. WABU Gloucester City, WRAX Highland Park, WEBA Lambertville, WTAZ Newark, WAAM. WBS. WCBX, WOR N. Plainrleld, WE AM Paterson, WBAN Salem, WDBQ Trenton, W^MAL. WO AX, WWAB New Mexico: State College, KOB New York: Buffalo. WGR State, City, Call Canton, WCAD Cazenovia, WMAC Ithaca, WEAI Kingston, WDBZ Lockport, WMAK New York, WBAY, WBBR, WDBX, WEAF, WHN, WJY, WJZ, WLAW. WNYC, WQAO. WSAP Rochester, WABO, WHAM Schenectady, WGY, WRL Syracuse, WFAB, WLAH Tarrytown, WRW Troy, WHAZ Utlca, WSL North Carolina: Charlotte. WBT Wilmington, WBBN North Dakota: Fargo, WDAY. WPAK Grand Forks, KFJM, KFJQ Ohio: Canton. AQ6 Cambridge, WEBE Cincinnati. WAAD, WHAG, WLW. WMH, WSAI Cleveland, KDPM, WDBK, WHK, WJAX. WTAM Columbus. WBAV, WCAH, WEAO, WMAN, WPAL Dayton, AW5, WABD, WDBS Dover, WABP Granville, WJD Hamilton, WRK Lima, WOAC Newark, WBBA Pomeroy, WSAZ Sandusky, WABH, WQAF Springfield. WNAP Toledo, WABR, WTAL Wooster. WABW Yellow Springs, WRAV Youngstown, WDBF Oklahoma: Bristow. KFJK Chickasha, KFGD Muskog«e. KFQL Norman, WNAD Oklahoma City, KFJF. KFQJ, KFQR, WKY Okmulgee. WTPAC Tulsa. WGAF, WLAL Oregon: Arlington, KFGL Astoria, KFJI CorvalUs, KFDJ Hood River, KQP Medford, KFAY Pendleton, KFFE Portland. KDYQ, KFEC, KFIF KFQN, KGG, KGW Pennsylvania: Allentown. WCBA, WSAN Altoona, WGAW Arnold, WCBU Buck Hill Falls, WCBY Butler, WBR East Pittsburgh, KDKA Erie, WOAV Grove City, WSAJ Harrisburg. WABB, WBAK Haverford, WABQ Johnstown, WBBV, V~ ' C Lancaster, WDBC WoAL McKeesport. WIT". Parkersburg, WtlAA Philadelphia, W^BY. WBBT, WCAU. WDAK, WFI, WGL, WIAD, WIP, WNAT, WOO, WWAD Pittsburgh, KQY, WCAE, WCBF, WJAS Reading, WBBD, WRAW Scranton, WQAN State, City, Call State College, WPAB Washington, WABT Wilkes-Barre. WBAX Rhode Island Cranston, WKBF East Providence, WRAD Providence, WCBR, WEAN, WJAR, WSAD, WTAG South Carolina: Charleston. WBBY, WOAH Clemson College, WSAC South Dakota: Brookings, KFDY Rapid City, WCAT Vermilion, WEAJ Yankton. WNAX Columtria.WDBW Tennessee: Lawrenceburg, WOAN Memphis, WCBO, WMC Nashville. WCBQ Tullahoma, WCBV Texas: Abilene, WQAQ Amarillo. WDAG, WQAC Austin, KFQM _ College Station, WTAW Dallas, WFAA. WRR Denison, KFPQ, KFQT Dublin, KFPL El Paso, WDAH Fort Worth, KFJX, KFQB, WBAP Galveston. KFLX, KFOQ, WIAO. Greenville, KFPM Houston, KFCV, WCAK, WEAY WEV Orange, KFGX Port Arthur, WFAH San Antonio, ASB, WCAE, WOAI San Benito, KFLU Tyler, WOAF Waco, WJAD Wichita Falls, WKAF Utah: Ogden. KFCP Salt Lake City, KDYL, KFOO, KFPH Vermont: Springfield, WQAE Virginia: Arlington, NAA Blacksburg, WEAE Fortress Monroe, WNAW Norfolk. WBBW, WTAR Richmond, WBBL Roanoke, WDBJ Washington: Bellingham. KDZR Everett, KFBL Lacey, KGY Neah Bay, KFHH NoTth Bend, KFQW Olympia, KFPP Pullman, KFAE Seattle. KDZE. KFHR. KFJC, KFOA, KFPB, KFQX, KHQ, KJR, KTW Spokane, KFIO, KFPY Tacoma. KFBG, KGB, KMO Walla Walla. KFCF Wenatchee, KDZI West Virginia: Charleston, WPAZ Clarksburg, WHAK Martinsburg, WDBD Wisconsin: Fond du Lac, KFIZ Kenoska. WOAR Wisconsin: La Crosse, WABN Madison, WHA Milwaukee, WCAY, WHAD, WIAO Osseo, WTAQ State, City, Call Sisiht, WAR St. Criox Falls, WRAL Stephens Point, WLBL Superior, WDBP, WEBC Wyoming: Casper, KFEV, KFPS Laramie, KFBU Anchorage, KFQD Juneau, KFIU Kukak Bay, KNT Hawaii: Honolulu, KGU Porto Rico: San Juan. WKAQ Australia: Willouby, 2FC British Isles: Aberdeen, 2BD Birmingham, 51T Bournemouth, 6BM Cardiff, 5WA Glasgow, 5SC London, 2LO Manchester, 2ZY Newcastle, 5NO Plymouth, 5PY Sheffield. 6FL Canada: Bellevue. CFCO Calnary, CFAC, CFCN, CHBC. CHCM. CHCX Edmonton, CFCK. CJCA Halifax. CHAC Hamilton, CHCS Iroquois Falls. CFCH Kingston, CFRC London, CFCW, CJGC Mont-Joli, CJCM Montreal, CFCF, CFUC, CHYC, CKAC Nanaimo, CFDC New Westminster, CFXC Olds, CJCX Ottawa, OA, CKCH. CKCO Quebec, CFCJ, CHCD, CKCI Regina, CKCK St. John, CJCI Saskatoon, CFQC Sudbury, CFCR Toronto, CFCA, CHCB. CHCX CJCD. CJCN, CJSC. CKCE Vancouver. CFCQ, CFYC, CHCL, CJCE, CKCD Victoria, CFCL. CHCE Winnipeg, CKY Cuba: Caibarien, 6EV Cienfuegos, 6AZ, 6BY, 6CX, 6DW Camaguey, 7AZ, 7BY Colon, 5EV Ella, 7SR Havana. PWX, 2AB. 2BY, 2CX, 2DW. 2HC. 2HS, 2JQ, 2KD, 2KP, 2LC, 2MG, TOK. 20L, 2TW, 2WW Santiago, 8AZ, 8BY, 8DW, 8EV, 8FU, 8GT Tuinucu, 6KW, 6XJ Czecho Slovakia: Prague. KBELY Finland: Skatudden Tammerfors, 3NB France: Lyons, YN Paris, CW, ESP, FL Mexico: Mexico City. CYB, CYL, CYX Monterey, CYO Switzerland : Geneva. HB1 Lausanne, HB2 The Reader's View Those Spark Stations Again The letter signed B. C. L. Seymour, Mo., in your issue of January 26, 1924, brings up a point which is fast becoming so serious that I believe manufacturers will shortly find their sales curtailed as far as receiving apparatus is concerned, if some remedy is not speedily put into effect. It is disgraceful that the United States should be the only civilized nation which allows promiscuous use of the 450 meters for commercial and ship stations. It is safe to say that with the multitudinous frequencies of the spark, a wave length of 450 interferes not only at its fundamental but will cause QRM 100 meters each way — this being equivalent to causing poor reception from 350 to 550 meters, the principal broadcasting wave lengths. We have had our troubles here with government stations, which now, however, have been reduced to a minimum — comparatively little spark interference occurring due to Canadian government stations. There is a certain interference from the "brass pounder;" a more serious interference due to reradiation from improperly tuned regenerative sets, but the main difficulty today in the way of decent reception of the vast quantity of r.plendid material broadcast in the United States, is the 450-meter spark. Particularly bad is the inconsidered, careless and unnecessary use of the shorter wave frequencies assigned to broadcasting by commercial and ship stations. Is the objection raised that it will be expensive to make necessary alterations? Was there any objection from the B. C. L. when new wave frequencies were assigned for broadcasting which necessitated alterations? I don't think so. It is too much to expect all at once to see the spark stations converted to C. W., but this is coming. In the meantime, will not the government afford what reasonable relief it can to ameliorate the present deplorable conditions — conditions which are bringing Radio B. C. L. into disrepute as a source of information, or a means of enjoyment? As I sit here writing and listening to WDAF, the concert is periodically driven off the map or partially absorbed by mush from spark stations, and this will continue ftftf;r I go to bed, after having vainly tried to extract some enjoyment from the Am bassador Hotel orchestra in Los Angeles, as distinct from spark signals on any or all wave frequencies. — B. Geekie Cobb, Toronto, Can. Stunts with Radio My attention was drawn to an article by J. T. Curtis, Cleveland, O., in Radio Digest on "Loud Speaking Transformers with 5-foot Cord." I am sure you will admit such things are always received with a smile and forgotten a few moments after reading by those who have never experienced such happenings, but on the other hand, with some credit by those who have had a thrill when something along these lines happened. I wish to give you something on this order, and if you care to publish it I am sure it will be appreciated by every fan who reads your magazine. I warrant either stunt will not be very soon forgotten. First I have a crystal set, inductance coil 90 turns, 18 taps, buzzer attached, 1 pr. W. E. H. phones, 2,200 ohms. I attach both ground and aerial, tune in and then remove both the aerial and ground. I can now pick up my set and walk around to any part of the third-floor rooms, and the music or speech still continues. When the B. C. stops, it is necessary to return to the point of starting and tune in again with the aerial and ground connection. To do this, one must stand during the reception, touch nothing and keep at a distance from any nearby object. I have tried to descend the stairs to a lower floor, but the signals grow weaker as I do so and gradually fade away entirely. This stunt I have shown many times for my Radio acquaintances. Another peculiarity in connection with this feat is that I never was able to do it elsewhere than in my own attic. Referring to Mr. Curtis reception, a few days ago I was confined to my bed with sickness. I : am hard of hearing in my left ear, but was lying with my good ear up, and I very distinctly heard the time dots and the final buzz at 10 o'clock, August 24. The station I do not know. I have a room full of Radio sets and accessories of every kind and often use the wire springs of my bed as an antenna. At this time there was only one set connected to the outside antenna, but not working at the time and the rheostats turned oft as usual. There were no possible Radio connections to which I could attribute this reception. This, as Mr. Curtis says, "sounds fishy," but it is a fact nevertheless. I am an electrical engineer and past the age for making any stagey or misleading statements. I will say, however, that I think the springs on the bed have something to do with this freak stunt. For on the same springs, during December, I received a telegraph code message from Pittsburg, Pa., with a pair of head phones, using only the springs as an antenna. If you consider this available for publication, I would be pleased to hear from some other fans who have anything of this order to offer. It is only by experiment and co-operation that we amateurs get anywhere. My experience has brought me some wonderful results that are not to be found in any of the many Radio books for sale today. — Frank F. Howe, Sr., Milwaukee, Wis. Review of Books Vacuum Tube Receiver. By O. F. Heslar. A book that tells how to make a simple set. How to make the cabinet. It includes a 27 by 36-inch layout blueprint. Price, 75 cents. How to Retail Radio. A new book telling of tested plans and methods and policies for the dealer in Radio. Financing, location, store equipment and arrangement. Price, $2. Home Radio — How to Make It. By A. Hyatt Verrill. This book is particularly adapted for the amateur who desires to know how to make Radiophones. Twelve full page illustrations and diagrams. Price, 75 cents. Radio for the Amateur. By A. H. Packer and R. R. Haugh. The underlying principles of Radio thoroughly explained in simple language and understandable illustrations. This book will teach you how to construct and operate a receiving set successfully. Price, $1.50. Radio Reception. By Harry J. Marx, Technical Editor Radio Digest Illustrated, and Adrian Van Muffling. A simple treatise on Radio reception. Beginning with the elementary principles of electricity it carries the reader on into the essentials of Radio telephony. The most successful methods of Radio reception are explained and special attention given to practical tuning. Price, $2.00. Elements of Radio Communication. By Ellery W. Stone. A splendid, well connected, complete, accurate an<J up-to-date discussion of every -phase of Radio telegraphy and Radiotelephony. Written in simple language. The subject is presented from the physical rather than from the mathematical standpoint, avoiding the use of higher mathematics. Price, $2.50. Within the Atom. By John Mills. May be read by the Radiophan with interest for it deals with that infinite particle as associated with electrons, and all chemical and all electrical phenomena. Price, $2.00. Experimental Wireless Stations. By P. E. Edelman. Simple directions are given in this book for making Radio equipment for the transmission of messages over long distances. Price, $3. The Radio Amateur's Handbook, By A. Frederick Collins. A new revised edition of this book is just out. It is a complete authentic and informative work on Radio. Fully illustrated. Price, $1.50. Amateur Radio Call Book. We have a few copies of this valuable book of the fourth edition. It contains a list of amateurs, special amateurs, technical and training stations. Tells how to construct a Reinartz tuner, detector and amplifier. A two-color map comes with it. Original cost, $1. While they last, 50 cents. The A. B. C. Vacuum Tubes. By E. H. Lewis. It is a book for beginners who have no knowledge of either Radio or electricity and sets forth the elementary principles of theory and operation of the vacuum tube. No attempt has been made in this book to describe all the possible circuit arrangements, but those shown may serve as suggestions to experimenters who desire to evolve their own circuits. Price, $1.00. Ideas for the Radio Experimenter's Laboratory. By M. B. Sleeper. This book tells in a simple way the how and why of Radio apparatus. Comprehensive data are given on such necessary laboratory instruments as the oscillator, wavemeter, direction finder, Radio compass, vacuum tube, characteristic measuring set and detailed advice given on the winding of various kinds of standard inductance coils. Price, 75 cents. The hook department of the Radio Digest is prepared to send you any of the books on Radio published, whether listed in our Book Review or not. Let us know what hook you want, send us your check and we will see that the book is mailed to you. Postage stamps in payment for books not accepted. Send money order or check. Radio Book Department, Radio Digest, SIO N. Dearborn St., Chi