Radio mirror (Jan-Oct 1923)

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RADIO DIGEST II June 16, 1923 FANS LIKE IDEA OF BIG REWARD OFFER ONE TELLS HOW HE HAS FRIENDS SAVE COUPONS Much Valuable Standard Apparatus Available to Radiophans By Saving Consecutive Coupons •j SPECIAL REWARD OFFER j Coupon Number 3 H This Special Reward Coupon ^ appears each issue in Radio S Digest until further notice. |j| "When sent in, accompanied j|§ by necessary remittance, ac n§ cording to the rules govern §§§ ing same, apparatus can be m secured. See apparatus list ^ and rules of offer below. s Save Me — I Am Valuable 1 r,: The Special Reward Offer announced in the June 2 issue has been received with enthusiasm by the regular readers of the Digest. One fan writes: "Just the opportunity I have been waiting for. There have been many pieces of apparatus I have wanted but the old pocketbook wouldn't stand for my getting them. Now with the Special Reward Coupons (I have taken your paper regularly since the first number) I am clipping them every week and will soon have two or three pieces of apparatus I have wanted for some time, and at practically no expense." "Notice quite a few things I want among those you are offering," writes another subscriber. "I have asked several of my friends who take your paper to save their coupons for me. Great stuff Digest; I'm for you." Many realize that all that is necessary to secure the valuable, standard pieces of apparatus listed below is to clip the coupon appearing on page two of the Digest each week and mail them together with the necessary remittance to the office. There is no limit to the number of coupon series that can be sent in for apparatus. Rules to Remember One point must be emphasized to those contemplating taking advantage of the special offer; that is, that the coupons turned in for any item must be numbered consecutively, as for example, 1, 2, 3, and 4 or 3, 4, 5 and 6. The number of coupons necessary and the cash remittance, of course, depend on the item sought by the reader. There is no* limit to the number of series turned in by any one reader. Another point to remember is that cash, checks and money orders but no postage stamps will be accepted. To make selection more simple tbe items have been divided into eight classes, each class depending on the number of consecutive coupons and amount of cash remittance necessary. The eight classes of items follow: Class A Articles For two consecutitvely numbered coupons and thirty cents (S0.30) any one of the following articles will be sent: 1 Carter Imp Jack and Plug: 1 Carter 15-Ohm Resistance Unit; 1 Schindler .00025 mfd. Build-up Mica Condenser; 1 Schindler .0005 mfd. Build-up Mica Condenser; 1 Snindler .001 mfd. Build-XJp Mica Condenser; 1 Schindler .002 mfd. Build-Up Mica Condenser;1 Schindler .0025 mfd. Build-Up Mica Condenser: 1 Martin-Copeland Sta Put Plug; Walnart Standard Tube Socket; Walnart UT-199 Socket; Bay-O-Tac Dry Battery, 1% volts; Dubilier Mlcadons Type 601 (.0001, .00025, .0005, .001, .002, .0025, .003 or .004 mfd.); Premier Gird Condenser (.00025 or .0005 mfd.); Premier Variable Resistance, Class B Articles For four consecutively numbered coupons and sixty cents ($0.60) any one of the following articles will be sent: 1 Carter .04 mfd. Special Fixed Condenser: 1 Carter Jack Switch; 1 Carter Hold-Tite Jack, One Spring Open Circuit; 1 Carter Hold-Tite Jack, Two Spring Closed Circuit; 1 Carter Hold-Tite Jack, Three Spring Filament Control; 1 Carter Hold-Tite Jack, Four Spring Closed Circuit; 1 Carter Hold-Tite Jack. Five Spring Filament Control; 1 Pudlin Variable Grid Leak with .00025 mfd. Condenser; 1 Federal Universal Phone Plug; 1 Federal Open Circuit Jack; 1 Federal Closed Circuit Jack; 1 Federal Double Circuit Jack; 1 Martin-Copeland Shur Grip Plug; 1 Martin-Copeland WD-11 Socket; 1 Martin-Copeland WD-11 Adapter: 1 Martin-Copeland UV-199 Socket; 1 Martin-Copeland UV-199 Adapter 1 Martin-Copeland Pull Switch; 1 Martin-Copeland 5-point Inductance Switch; 1 MartinCopeland Variable Grid Leak; 1 Martin-Copeland SPST Knife Switch 1 Martin-Copeland SPDT Knife Switch; 1 Martin-Copeland DPST Knife Switch; 1 Martin-Copeland DPDT Knife Switch; Walnart Variable Grid Leak; Walnart Inductance Switch; Electrad Grid Leak (with clip mountings) ; Dubilier Micadons Type 600 (.0001, .00025, .0005, .001, .002, .0025, .003, .004, or .005 mfd.); Dubilier Micadons Type 610 (.001, .002. .0025, .003, .004. or .005 mfd.) ; Dubilier Micadons Type 601 (.006 mfd.): Dubilier By-Laws Condenser (.1, .25, or 5 mfd.) ; Premier Universal Tube Socket; Premier Radio Dial (3/16, Vt., or 5/16 inch black or white face) ; Premier Universal Radic Jack. Open Circuit; Premier Universal Radio Jack, Two-Circuit Three Spring; Premier Universal Radio Jack, Two-Circuit Four Spring; Premier Universal Radio Jack, Filament Control Three Spring; Premier Switch Lever and 10 Points. Class C Articles For six consecutively numbered coupons and ninety cents ($0.90) any one of the following articles will be sent: 1 Carter 6-0hm Vernier Control Rheostat; 1 Carter "Tu-Way" Plug; 1 Federal Panel Mount Socket; 1 Federal 6-Ohm Rheostat; 1 Federal 3-Ohm (Power) Rheostat; 1 Amperite Automatic Filament Control (with mounting); 1 Martin-Copeland Marco Rheostat; 1 Martin-Copeland Series Parallel Switch: 1 Martin-Copeland DPDT Panel Switch: 1 Martin-Copeland 7-Point Inductance Switch: 1 Martin-Copeland 9-Point Inductance Switch; 1 Martin-Copeland 11-Point Inductance Switch; Walnart Variable Grid Leak with .00025 mfd. Condenser; Walnart Variable Condenser (3-plate .00006 mfd.); Ray-O-Vac Dry Battery. 2 .cells 1% volts; (Continued on page 6) AN EVENING AT HOME WITH THE LISTENER IN (SEE NOTE BELOW FOR INSTRUCTIONS) Station and City CFCA, Toronto, Ont CFCN, Calgary, Aha CKAC, Montreal, Que. . . . KDKA.E. Pittsburgh, Pa.. KFAF, Denver, Colo KFDB, San Francisco. Calif. KFI, Los Angeles, Calif KGW, Portland, Ore KHJ, Los Angeles, Calif. . . . KPO, San Francisco, Calif. . KSD, St. Louis, Mo KYW, Chicago, HI NAA, Radio, Va PWX, Havana, Cuba WBAP, Fort Worth, Texas. WBZ, Springfield. Mase. . . . WCX, Detroit, Mich WDAF, Kansas Citv. Mo... WDAJ, College Park, Ga. . . WDAP, Chicago, 111 WDAR, Philadelphia, Pa... WEAF, New York. N. Y. . . WFAA, Dallas. Tex WFI, Philadelphia. Pa WGI, Medford. Mass WGM, Atlanta, Ga WGR, Buffalo, N. Y WGY, Schenectady, N.Y.. WHA, Madison, Wis WHAS, Louisville. Ky WHAZ, Troy, N. Y WHB, Kansas City, Mo. . . . WHK, Cleveland, 0 WIP, Philadelphia, Pa WJAX, Cleveland, 0 WJT, New York, N.Y.... WJZ, New York, N. Y WKAQ,San Juan, P. E.... WLAG, Minneapolis, Minn. WLW, Cincinnati, 0 WMAO, Chicago, 111 WMC, Memphis, Tenn.. . . . WOAI, San Antonio, Texas. WOC, Davenport. la WOO, Philadelphia, Pa ... . W OR, Newark, N. J WOS, Jefferson City, Mo. . . WSB, Atlanta, Ga WST, Birmingham, Ala WW J, Detroit, Mich Met. Monday Tuesday Wednesday Thursday Friday Saturday Sunday 6:00 7:00 5:00 9:00 9:00-10:00 10:00-12:00 9:00 1:00 10:00 2:00 8:45-12:00 8:00-12:30 7:00 8:30 5:45 7:30 9:30-10:30 6:30 8:00 7:00-10:1 6:00 1:00 7:30-11:30 5:30 9:00 5:30 8:00 8:30 9:30 4:30 5:00 9:30-10:30 6:00 8:00 6:45 9:00 7:00 9:00 8:00 9:30 5:00 5:30 4:00 5:30 5:30 9:30 6:30-10:30 7:00 9:00 8:00 9:30 7:00 8:30 6:00 9:00 5:15 6:30 8:00 9:30 10:45-12:00 8:00 8:45 6:00 7:30 6:00 7:00 6:00 9:00 5:00 9:00 9:00-10:00 6:00 7:00 11:30-12:30 5:00 9:00 9:00 1:00 8:45-12:00 10:00-12:00 8:00-10:00 9:00 9:30 6:05 7:20 9:30-10:30 6:30 8:00 7:00-10:00 6:00 1:00 7:30-11:30 10:00 2:00 5:30 6:00 5:30 6:00 8:30-12:00 4:30 5:00 7:30 9:00 9:30-10:30 6:45 9:00 7:00 8:00 7:30 9:00 8:00-10:00 5:00 5:30 5:00-10:00 6:30 8:30 5:30 9:30 5:30 9:30 6:30 8:00 6:30-10:30 9:00-11:00 7:00-10:00 8:00-12:00 9:30-10:30 7:00-10:00 16:45-12:66 '6:00-' 7:30 10:00-12:00 9:00 1:00 10:00-11:00 8:45-12:00 8:00-10:00 7:00 8:30 6:25 8:40 8:00-10:30 9:30-10:30 6:30 8:00 7:00-10:00 6:00 1:00 10:30-11:30 5:30 9:00 5:30 8:00 8:30 9:30 4:30 9:30 5:45 7:30 12:00-1:00 6:00 8:00 '7:00-' 8:66 7:30 9:00 7:00 8:45 5:00 5:30 5:30 9:30 7:00 9:00 7:00-10:00 10:00-11:00 5:15 6:30 8:00 9:30 10:45-12:00 8:00 8:45 6:00 7:30 6:00 7:00 6:00 9:00 5:00 9:00 9:00-10:00 9:00 l:i 8:45-12:00 10:00-12:00 7:00 8:30 5:45 7:40 9:30-10:30 6:30 8:00 7:00-10:00 6:00 1:00 7:30-11:30 10:00 2:00 5:30 6:00 5:30 8:00 8:30-12:00 4:30 5:00 8:30-10:00 9:30-10:30 6:45 9:00 7:00 9:00 7:30 9:00 8:00-10:00 5:00 5:30 5:00 5:30 7:15 9:30 5:30 9:30 6:30 9:30 5:30-10:30 9:00-11:00 7:00-10:00 8:00 9:30 7:30 8:30 7:00. 8:30 5:15 6:30 10:45-12:66 '6:00-' 7:30 6:00 7:00 5:00 9:00 9:00-10:00 10:00-12:00 9:00 1:00 9:00 2:00 8:45-12:00 8:00-12:30 10:00-12:00 7:00 8:40 9:30-10:30 6:30 8:00 7:00-10:00 6:00 1:00 7:30-11:30 6:00 1:00 5:30 6:00 8:30 9:30 6:30 8:30 8:30-10:00 9:30-10:30 6:00 8:00 6:45-11:00 7:00 8:00 7:30 9:00 5:00 5:30 5:00 5:30 5:30 9:30 5:30 9:30 6:30-10:30 7:00-10:00 8:00-12:00 7:00 8:30 6:00 9:00 7.00-10:00 8:00 9:30 10:45-12:00 8:00 8:45 6:00 7:30 6:00 7:00 11:30-12:30 6:00 9:00 5:00 9:00 9:00-10:00 9:00 1:00 8:45-12:00 10:00-12:00 8:00-10:00 7:00 8:30 8:00-10:30 7:00 7:20 6:30 8:00 6:00 1:00 7:30-11:30 10:00 2:00 5:30 6:00 5:30 8:00 8:30-12:00 7:00-10:00 7:30 9:00 9:30-10:30 7:00 8:00 7:00 8:00 7:30 9:00 5:00 5:30 8:10-10:00 5:30 9:30 6:30 8:00 6:30-10:30 7:00-10:00 8:00 9:30 9:30-10:30 '5:15-' 6:30 i6:45-i2:66 5:45 6:45 3:00 4:30 6:30 7:30 9:00 9:30 10:00 1:00 9:00-ld:00 10:00-12:00 6:00 7:00 3:30 4:30 7:00 8:00 4:00 5:00 11:45 1:00 7:30-11:30 9:00-12:00 9:30-10:30 5:30 6:30 8:30-10:00 7:30 8:00 6:30 7:30 8:00-10:00 7:00 8:45 6:30 8:00 7:30-"8':30 9:30-10:30 7:00 9:00 7:30 9:00 7:30 8:30 6:30 7:30 Instructions for Use. — All the hours above are given in Central Standard Time. If your city uses Eastern Time, add one hour to each of the periods stated; if your city uses Mountain Time, subtract one hour; if your city uses Pacific Time, subtract two hours. If in addition your city is using Daylight Saving Time, add one hour to this result. CONTENTS Radio Digest, Illustrated, Volume V, Number 10, published Chicago, Hlinois. June 16, 1923. Published weekly by Radio Digest Publishing Company, 123 West Madison Street, Chicago, Illinois. Suhscniption rates, yearly. Five Dollars; Foreign, Six Dollars; single copies. Ten Cents. Entered as second-class matter at the postofflce at Chicago, Illinois, under the Act of March 9, 1879. "All the lave News of Radio" I to 6 Numerous Letters from Fans Show listener In Audience Wants Variety 4 Globe Pick-Up Pictures Audience 5 Flewelling Answers, by E. T. Flewelling 5 The Week's Advance Broadcast Programs 7 Radiophone Broadcasting Station Directory, Part HI with City-Station Index 8 Editorials; Indi-Gest; Condensed by Dielectric ' 10 First Steps for Beginners, Chapter V — Tuners and Tuning, by Thos. W. Benson 11 Variations in Flewelling Circuit; Lines for Grid Leak on Bottom of Vacuum Tube; Other Kinks. 12 Characteristics of Some New Vacuum Tubes, Part III — Curves for Five More Triodes; Conclusion, by H. J. Marx 13 RD.-85 Is Another Good Portable 14 Questions and Answers; Six Tube Circuit 15 Radio Illustrated, a Page of Pictures 16 Looking Ahead Portable Sets Galore for the Summer Radiophan— Next issue is the Portable Set Number of Radio Digest. You hot weather airphone fans, get next week's copy early so you can begin building a compact receiver for the beach, camp, automobile, or whatever good use you may have in mind. There will be lots to take your choice from. For instance — A Flewelling Cigar Box Portable — Costs little and hears 'em all on a short length of wire for an aerial. Read about it next 'week. The World's Smallest Regenerative Set — Three and one half by three and one quarter inches only, and has picked up stations over 800 miles away. It was built by Roslyn Russel of Niagara Falls, N. Y., and will be explained in detail June 23. A Camper's Set Complete — Designed by H. J. Marx. A dandy outfit for the lover of the out-of-doors. Another feature in the Digest next week. R.D.-86 Hook-Up Diagram — A wonder for the fan who desires a simple, sure-fire set for the beach. See page 14 issue of June 23. Even Q. & A. Next Week Will Be Portably Inclined — that is, hand picked so that they will be of most benefit to those contemplating the use of a small set this summer. Have a Copy with You on Your Vacation WHEN YOU WANT Radio Digest YOU WANT IT! BE SURE OF YOUR WEEKLY COPY BY SUBSCRIBING NOW SEND IN THE BLANK TODAY Publisher Radio Digest, 123 West Madison St., Chicago, Illinois. Please find enclosed check H. 0. for Five Dollars (Six, Foreign) for One Year's Subscription to Radio Digest, Illustrated. Name Address City State U. S. REDS USE RADIO (Continued from page 1) weeks. All of the messages, he said, were in the guise of an appeal on behalf of the working class, but like all radical propaganda, the main parts of the talks embraced attempts to belittle the existing form of government. This new form of propaganda, federal agents believe, is being paid for by the Russian soviet government. A question arises as to whether legal methods can be found to close up such stations that broadcast radical propaganda, and a conference will be held soon with officials in Washington concerning such a move. They Took It Good-Naturedly CHILLICOTHE, OHIO.— Local Kiwanians recently thought they were dancing to Radio music and were so pleased by the novelty that they girated till midnight, when it was disclosed to them the music was furnished by a phonograph connected with tube amplifying set. The trick is in the Coil NO STORAGE BATTERY REQUIRED No Radio Frequency Trans o former used. Not Super but I DOUBLE Beflex Regeneration. J Works local without antenna or j ground, and brings in the I "FAB AWAY ONES" with j more volume than you ever J thought one tube could de = liver. Money Order for 25 cts. brings S easy to read diagrams and all I information. Address: JACK PRATT j 508 Railway Exchange Bldg., ' Chicago, III. P. 5. : Its Radio Golf Rec » ord is 119,000 miles. First Trial Picked Up Havana | from New York RADIO "BUGS" Get into Business for Yourself Why not turn your hobby into money? You can easily make $15.00 a day, or as much more as you like, by our wonderful plan of selling Radio direct to the millions of people just waiting for our better parts or sets. We furnish everything you need at lowest factory prices and tell you how to build a profitable business of your own. Knott products are up-to-the-minute. Knott plans are unique and unbeatable. Radio is just beginning to come into its own — are you?_ Want to make more money — want to be your own boss? Write TODAY for FREE instructions, How To Sell Real Radio. E. R. KNOTT MACHINE CO. l-D Ellery St., S. BOSTON 27, MASS. DEALERS! We claim to handle only standard and well-known Radio merchandise. On top of that -we have the most attractive discounts of any Radio jobber to offer you. It will be worth while writing for our latest discount sheet. WEMSetocn 159 *J. STATE ST., CHICAGO,!!!,, AT LAST A REAL RADIO MAP WITH SIGNAL SYSTEM Kit* separate index of Broadcasting Stations. Designed by a Badio Expert. Map printed in two colors on heavy paper, 61ze 19"x24". 16 page Index gives call letters, names and addresses of Broadcasting Stations, Kilocycles. Meters, space for Dial Adjustments and Supplementary List. Permanent and graphic record of stations received made on map and index by use of small colored signals, furnished with map in two sizes and three colors. These take place of colored headed pins that are both destructive and expensive. No Badio Set complete without this convenient system. PRICE 50 CENTS PER SET— Send 12c for postage. Carried bv Badio, Book and Stationery Stores. Jobbers, write for discounts. L. L. SMITH & CO. 9 Knapp Street BOSTON. MASS. Vte Will JlailVbu One IF COMPARE IT WITH WHAT YOU ARE NOW USING OURS IS BETTER MAIL US. 3 0 CENTS NOT Return it at Our Expense Zo belStein laboratories 322 9™ ST. BROOKLYN.N.Y.SouiHaesO. HUM!