Radio mirror (Jan-Oct 1923)

May 19, 1923 RADIO DIGEST Questions and Answers Crystal Set (8613) afk. Chicago, 111. Is enclosed hookup all right? "What is the Hinge? Which condensers shall I eliminate? Forty-three plates ? Can an electric light socket be used as an aerial for this set? How far is Argo. 111., from the loop of Chicago? A. — Xoting sketch of hookup shown in illustration we are advising that it is cor rect in detail and would have a range of about fifty miles. "Would advise elimination of all condensers shown with dotted lines. Use only the one in the ground lead. An electric light socket can be used for an antenna, as suggested. A regular antenna is preferable, however. We are not at this writing familiar with the exact location of Argo, Illinois. However, its distance from Chicago can be ascertained easily through RR time table. The Q. and A. department service is intended for assistance in Radio information, not for geographical measurements which can be answered through the efforts of the interrogator. BO 66 (2413) REE, Baltimore, Md. Please refer to your issue of December 23, 1922, describing receiving outfit RD 66. Several of us have hooked up this set and we find that it does have selective qualities and appears to have fair signal strength. However, the drawingas published does not appear to us to be correct because in the tickler coil circuit there appears to be no tuning adjustment with either the secondary condensers or the movement of the two honeycomb coils. In fact you can remove the honeycomb coil from this set, where it is in the tickler coil circuit and the set will work just the same. No doubt these coils were inserted to have some effect on the operation of the set and if so, your published diagram does not place them properly. Will you please refer this matter to 10c will bring you immediately our 32-page booklet containing complete diagrams and descriptions of Flewelling, Reinartz, Super-Regenerative and other circuits. Information about tubes, hints on construction of sets and other valuable and instructive data for everyone interested in Radio is included. Our complete line of standard equipment is also illustrated and described — an up-todate catalog of the newest in Radio at right prices. FREMONT RADIO SALES CO. 227-229 Fulton St. NEW YORK CITY dpwtoJbuildthe Reinartz Receiver is told, complete with illustrations and diagrams, in the latest addition to the "ChiRad" Handbook-Catalog. Our Handbook also includes: 1." Technical discussions of standard radio apparatus and equipment. 2. Radio definitions, wireless codes, wire tables, definitions, etc. Pin this ad to your letter and mail it together with a dime for your copy of the Handbook. Send for it, today! CHICAGO RADIO APPARATUS CO. 415 South Dearborn Street, Chicago. B. D. the author of the drawing or to your Radio editor, who may be in position to advise? Would also like to have advice as to the size and capacity of condensers that should go in this circuit. A. — Answering your Inquiries with reference to RD 66 would advise that this circuit as it appears is correct. While the set will function, as cited, without the use of tickler coil, its purpose when employed is to offer impedance to signals of wave lengths other than those desired. It merely provides a lockout and does not require to be separately tuned. The condensers are both variable of .0005 capacity. Flewelling Development (3563) BMB, Montgomery, Ala Enclosed you will find a Radio circuit diagram. I have been experimenting with the Flewelling principle on a single tuner and the circuit I enclose is the result of my experiment. I have received KDKA, WHAS, WOAW, WGM, WSY, WOC, WHB, PWX, WFAA, WEAY, WOAI, WBAP, and several others without any aerial or ground with one bulb of the hand type as loud as the usual single circuit with one step of audio frequency amplification. You will notice a resistance marked ten thousand ohms. I am guessing at the ohms as I am using the secondary winding of an old automobile. The condenser B is a three plate vernier and it is very sharp tuning in stations, also cutting down a disagreeable hum so noticeable in the Flewelling Circuit. The variable condenser of the forty-three plate variety is not very sensitive. The inductance is a standard variocoupler. Please examine this circuit and explain DON'T TAKE A CHANCE on burning out your tubes when BH/FMORE AT7DION PROTECTORS will assure you against this. They furnish absolute protection for all tubes. Including Myer's, W. D. 11, etc.; every kind of tube manufactured. Price: 25c per package of two. Send now before you blow that tube! FREE!! With each package of BILTMOKE AUDION PROTECTORS—"How to Make the Wonder Set" This set can be assembled In an hour from our parts, at a cost of $25 complete, including "A" and "B" batteries, U. V. 201 A tube, and loud speaking unit This set on only a loop brings the broadcasting stations in strong enough to operate a loud speaker. We also sell the sets completely assembled. Dealers: Send for our proposition now. Biltmore Radio Cu.,335 Lamartine St., Boston 30 Mass. r REINARTZ ALL PARTS NECESSARY DEALERS: ATTRACTIVE DISCOUNTS "% IMiMM.'BtWJ 123 W. Madison Jt.Chica3o Good Bye Aerials! So Long Static (Pat. Pending) Replaces aerials, loops, electric light plugs, etc. Eliminates lightning dangers. Reduces STATIC and other interference. Brings clearer signals and truer tone. Works on all standard vacuum tube sets. Postpaid, Anywhere, for $5.00 Satisfaction Guaranteed, or Money Refunded. Short Cut Radio Corp. 243 West 54th St. New York "Dept. R. D." Makes Your Set Portable. Dealers write for our proposition actions to me. The part I cannot understand is that it brings In station louder and clearer without aerial or ground. I receive your paper every week and enjoy reading it very much. A. — Noting your specifications and sketch of Flewelling circuit evolved through experimentation shown in illustration we. are advising that the action cited is quite similar to that of the original Flewelling circuit. The resistance choke and three plate condenser act as verniers. TWO SUPERSENSITIVE CIRCUITS (Both Copyrighted) My Highly Improved Reinartz brings in all Important stations on both coasts and Mexican border, loud, clear and without distortion. We dance to music from Atlanta received on one loud Baldwin unit. Build one of these wonderful sets from my blueprints and specifications, price 50c, or with a perfect and complete double wound spiderweb coil, *3.00 by mall. No other windings used. Pkoto of my set on a glass panel with every order. This copyrighted circuit is the most successful of any Reinartz modification yet produced, and Is imitated the most. Thousands are in use. My W. D. II Circuit is especially designed for use with the "Pickle" tube and brings out the full value of that little tube as no other circuit can. Stations 1000 miles away come in clearly on one tube. This set Is small, complete, portable. For the man who wishes the highest efficiency, this is tie set to build. Price of blueprint and specifications, 50c, or with complete and perfect windings, $3.00. Photo of set with every order. Either set is easy to build, easy to operate. Everything clearly shown. These high quality slut insulated coils are machine wound on fiber forms. I wind coils to your specifications in lots of 100 or more. Write for prices. S. A. TWITCHELL 1925 Western Ave. Minneapolis, Minn. RADIO At Cat Prices Standard parts only in original packing. Sold on a "money-back" basis. DIETZEN SUPER FONES TypeG CABINETS Made in our factory 7" I 10" $1.45 7" X 18".. 2.15 7" x 21" 2.95 MISCELLANEOUS $25.00 Acriola Jr. crystal set $7.95 .50 Large Radio map 35 8. 00 Dayton moulded variometer 5.45 5.00 Sleeper radio frequency transformer.. 1.95 5.50 180° Variocoupler, silk wound wire on bakelite 2.45 1.25 Western electric ammeter 49 6.50 43 PL Murdock variable condenser.... 3.25 3.00 Owl Badio frequency transformer.... 1.50 .75 3-inch Bakelite dial 35 3.50 1%-V. French, peanut tube with socket 2.50 When Ordering: by Mail Add Postage by the Following Scale PURCHASES Up to $1.00.... add 10c $1.01 to $2.00 " 15c 2.01 to 3.00 " 20c 3.01 to 5.00 " 25c 5.01 to 7.00 " 30c 7.01 to 1.0.00 " 40c f.oney Order or Personal Check Accepted RADIO STORES Dept. F. 12, 191 Fulton St, N. Y. C. We cannot account, without personal observation, for the fact that circuit receives best without antenna and ground. However, it should receive without one or the other. If of an experimental turn of mind, try out some of the freak hook-ups and see what results are obtainable with critical adjustments. Cockaday Circuit Complete PartsRegular Value, $26.00. $14.50 Dx-Flex Circuit Complete Parts — fljl *9 f\(\ Regular Value, $28.00 «pl#.W Reinartz coils $1.75 Coils for Greene circuit .35 DX Couplers 1.65 43 Plate Vernier 3.75 23 Plate Vernier 3.25 $6.00 Diamond Head Set, 2000 ohm 3.00 Mail Orders Promptly Filled WILLIAMSBURG RADIO SUPPLY CO., INC. Manufacturers and Jobbers of RADIO SUPPLIES 801 Flushing Avenue, Brooklyn, N. Y. BOUND VOLUMES Numbers Two, Three or Four Postpaid by Parcel Post with One Year's Subscription to Radio Digest Greatest Collection of Radio Information Ever Published Reinartz Long Distance Circuit: Ultra-Reinartz Circuit: Flewelling "Flivver" Circuit; Grimes '•Inverse Duplex" Circuit; Single Tube Reflex Circuit: Armstrong "Super-Heterodyne" Circuit; Two, Three and Four Tube Reflex Circuits. 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