Radio mirror (Jan-Oct 1923)

<UP RADIO DIGEST ILLUSTRATED SIMPLE DETECTOR SET EASY TO TUNE AERIAL-A RECEIVING UNIT HAS FEW CONTROLS Additional Amplification Stages Can Be Added — Appeal Made in Low Cost and Efficiency Photo Diagram, on Page 7 The standard receiving set illustrated on page seven is an Aerial-A, manufactured by the W. E. Supply and Service Corporation of New York, N. Y. It is one of the simplest that has yet been shown and consists of the detector stage only. Naturally, amplifying stages can be added but its appeal is in the low cost and efficiency of reception. It is provided with a minimum of controls, thus permitting the newest of Radiophans to operate it successfully. The antenna need not have a total length of more than sixty feet, thus permitting its use in many cases where fans are handicapped for sufficient antenna length. A well-connected lead to the ground is essential. Good electrical connection should be made to the water pipe or equivalent grounding point, and contact should be made by means of a ground clamp securely bolted to the metal surface, which previously has been scraped clean Of all dirt and corrosion. Description of Connections All connections are made at the back of the cabinet, the base of which projects about one inch, providing for the location of binding posts. Starting from the left side the first two are for the phone connections. The third post is for the positive side of the 22%volt plate or B battery. The center or fourth binding post is for the negative connection of both the plate and also the six-volt filament battery. The positive side of the storage battery is connected to the fifth post. The sixth post provides the connecting point for the ground lead, while the seventh or last post is for the antenna connection. Tuning Controls But three tuning controls are necessary, two of which are for the wave length adjustment, and the third for the filament control. This permits adjustment of filament lighting to the point of most efficient operation for the tube used. The lower tap switch knob regulates the inductance in the antenna circuit by means of the coarser taps in the windings, and should be first adjusted after the filament current has been turned on. This permits the locating of the taps where the reception comes in best. The finer adjustment of wave length is then affected by means of the upper tap switch, connecting to the finer taps of the primary winding. Because of the Book Reviews The Armstrong Snper-Begenerative Circuit. By George J. Eltz, Jr., E. E. This is a De Luxe edition of this famous circuit. Profusely illustrated and fully explained. Fifty-two pages. Price, $1.00. Radio Receivers for Beginners, By Snodgrass and Camp. Answers the universal question, "How can I receive Radio?" Price, $1.00. Home Radio — How to Make Xt. 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, 75c. Elements of Radiotelegraphy. By Elery "W. Stone. The text was written for the guidance and instruction of Radio students in the communication service of the Navy. It is an instruction book for Radio schools. Price, $2.50. 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 Communication, By John Mills. The fundamental principles and methods upon which recent developments are based are emphasized. The vacuum tube is treated in a simple, fundamental and upto-date manner. Present methods and tendencies of the art are explained in a chapter which is non-mathematical. Price, $2.00. Letters of a Radio Engineer to His Son. By John Mills. A series of interesting letters written to a boy. Each letter is full and complete and the most advanced student can skip over some of the letters and get just the information he desires. Price, $2.00. The hook department of the Radio Digest is prepared to send yon any of the hooks on Radio published, whether listed in onr Book Review or not. Let ns know what hook you want, send ns your check and we will see that the hook is mailed to you. Postage stamps in payments for hooks not accepted. Send money order or check. Book Department, Radio Digest Illustrated, 123 W. Madison St., Chicago, ni. permissible accuracy of these adjustments no variable condenser is necessary. After these two adjustments have been made, the filament rheostat knob can be readjusted for the best point of operation. Mischievous youngsters have been having a lot of fun cutting leads and ground wires of Radio sets. This up-to-date variation of the old ringing the doorbells and putting "ticktacks" on the windows is causing much annoyance to the Radiophans. Radiophan, After Hearing Programs of Nation, Longs for Something New Arm Chair "Globe Trotting" with Receivers Is Found to Be Delightful Hobby, However, Despite Certainty of Encountering Several Varieties of "Hot Lips" and "Tomorrows" The Radiophan sits at home comfortably settled in his armchair, with his "Aida" libretto at his elbow and hears every note of Verdi's opera broadcast by KYW of Chicago, while society, elaborately costumed, sits in its boxes, sees and is seen. The Radiophan knows not the divertisement of bright lights, perfume or stunning gowns. "The first act is over. Kindly stand by for about fifteen minutes." "This is Station KSD, The St. Louis Post Dispatch." A -speech by General Pershing is discovered on the air. "This is Station WHB, the Sweeny Automobile school, Kansas City, Missouri, the Heart of America." One travels through the ether waves from Denver to St. Paul. Hundreds of programs are broadcast each evening from all sections of the country. Programs Much Alike Programs are nearly all alike. Solos for voice and instruments fraternize with band and orchestra. The youthful soprano from the Kansas City Star sings the same song that the lady from East Pittsburgh sang last Tuesday or the lady from Atlanta will sing next Friday. Violin solos are often hackneyed arrangements. "Why doesn't some enterprising station broadcast a program of DIFFERENT Music instead of the publishers' latest? It may be good for the publishers' business but it is hard on the Radiophan. The listener in enjoys classics or songs of sentiment, but the modern programs have too little of these and too much emotional slush. Opera Stars and Jazz Vie Many stations broadcast records. Located where good talent is not always available, the enterprising broadcaster realizes that a good record is infinitely bet ter than a mediocre soloist. Operatic stars vie with jazz releases. You can count on several brands of "Tomorrows" and two or three "Hot Lips." The Radiophan is not overly critical. He has not paid for his concert and does not expect too much. Besides, if he doesn't like it he can always tune out without the performer having the slightest idea that he was ever there. If he doesn't like a selection he will probably blame it on the "static" and tune off to something else. Getting two concerts at once is inconvenient. It is a bit uncanny when listening in on a band number from Fort Worth, "The Eyes of You Keep Smilin' Through" from Newark. Wandering Back to Youth A harp solo, "Maiden's Prayer," from the Detroit News brings memories of little girls' first music lessons, pigtails and starched petticoats. As you dream and idly play with the dials, Louisville impudently jumps in with Al Jolson's "CooCoo." Davenport follows with "Where the West Begins." Minneapolis answers as "The Call of the North." "Winnipeg, Canada's, "Hello, hello, hello," is easily distinguished. The clock strikes. You have been globe trotting in your chair, "listening in" (in Radio vernacular) to everywhere. One by one the stations have signed o&. "This is Station WMAQ, the Chicago Daily News," closing chimes of "It's Three o'Clock in the Morning" are followed by "signing off at ten o'clock. Goodnight." But the air is not sleeping. The Drake Hotel, WDAP, Chicago, broadcasts dance orchestras far into the night. And somebody, somewhere, is always listening in. RADIO Manufacturer Direct to You LOWEST PRICES— HIGHEST QUALITY Everything guaranteed exactly as represented or money refunded. We pay the postage Variable Condensers $4.50 value, 43 plate $1.70 $3.75 value, 23 plate $1.40 $5.50 value, 23 plate Vernier $4.00 $6.00 value, 43 plate Vernier $4.50 $4.50 value, 1 1 plate Vernier $3.50 $3.25 value, 11 plate $1.25 $2.50 value, 3plate $1.10 SWITCHLEVERS with large * q tapered knob * *jC BAKELITE SOCKETS or tyo 3-inch dials «GOC $5.50 value, MOLDED &a Ark VARIOMETER «|>4.4U $5.00 value, MOLDED &A rtrt VARIO COUPLER Jj>4.UU 3 Coil HONEYCOMB MOUNTING 2 Coil HONEYCOMB MOUNTING INDUCTANCE SWITCH with tapered knob . . . Double Blade eliminates use of switch peints COMPOSITION DIALS, 2 or 3 inch $2.45 $1.00 E 22c SPECIAL JACKS SPECIAL These are a standard high grade make but we must withhold name of makers account cut in prices. Single open . . . 32c Double open . . . 43c Single dosed . .38c Single Fil 46c Double Fil 50c WD 11 BAKELITE SOCKETS WD 11 ADAPTERS 60c 50c BATTERY HYDROMETERS ALL SENSITIVE CRYSTAL . . . 40c 20c COMPLETE PARTS FOR FLEWELLING CIRCUIT includes 23 plate condenser, 3 .006 Condensers, 1 Freshman Variable grid leak, 1 panel grid leak, 2 honeycomb coils, a double coil mounting, 2 coil plugs, 8 rubber knob posts, with diagram for construction. Also 1 6x14 Panel. Outfit Complete for only $11.95 COMPLETE PARTS FOR RHEINARTZ CIRCUIT Includes 1 7x18 Panel, 1 bakelite socket, 1 high grade vernier rheostat, 11 plate condenser, 1 inductance switch eliminating panel drilling for points, 1 23-plate condenser, 3 fine switch levers, one Rheinartz type coil, 8 rubber knob binding posts, 1 variable grid leak, 25 feet wire for construction, mounting base board, and diagram, Complete for only. . . $10.95 We emphasize that we positively guarantee all goods purchased from us, and fill your orders same day as received. Lowest Prices, Highest Quality Manufacturers Outlet Company 53 West Jackson Blvd., Chicago, 111. MOCO RADIO PRODUCTS