Radio age (May 1922-Dec 1923)

42 RADIO AGE — "THE MAGAZINE OF THE HOUR" It Covers The Field! Over three hundred pages of fully illustrated instructions on how to build and operate sets! Truly a treasure trove for the home radio experimenter! Written by experts, diagrammed by experts, tested and proved by experts. And all so simple and clear that the beginner can understand. All kinds of circuits, with instructions on how to make them and amplify them. Readers' circuits on which they have made distance records. Long Distance crystal sets. How to hook 'em up. How to make the aerials do their darndest. How to make battery chargers. How to make transformers, coils, condensers, variocouplers, loading coils, dry-cell circuits, audiofrequency amplifiers, one-tube loop aerial sets, two-circuit crystal detectors. Ten issues of RADIO AGE, "The Magazine of the Hour," the "Old Reliable" guide. While They Last In One Volume — Cloth Bound — with one year's subscription to Radio Age! All for $3.50 Postpaid Send money order or check now. RADIO AGE, Inc. 500 North Dearborn Street CHICAGO Leviathan's Life Boats Two of the Leviathan's life boats, both ten knot motor boats, have radio transmitting and receiving sets and calls of their own. Life boat No. 67 is WSNA in radio talk, and No. 68 is WSNB. The Leviathan's own call is WSN, her two tenders carrying an additional letter. This is a new departure in American shipping, planned as an additional sea safety precaution. If the Leviathan's radio apparatus should get out of order, or she should be sunk, her two motor boats could communicate with relief ships, within about fifty miles, guiding them to the scene. Each of these radio-equipped craft carries a spark set, and one Kilowatt gas engine generator; they^communicate on wave lengths of 300 and 400 meters. New Army Stations The army signal corps is busy installing a radio station at Fort Douglas, near Salt Lake City, Utah, which will be the largest radio telegraph station of the army. It will have but one tube, the new ten kilowatt radiotron developed by the General Electric Company, which is building the equipment. Another similar station is being erected at Leavenworth, Kans., but this station will operate with two tubes and will have a telephone circuit as well as the radio telegraph. The radio circuit between these two stations, the Arlington, Va., station and a land line from Leavenworth to San Francisco, will span the United States. Each of the two interior stations will be equipped with two steel 300 foot towers. It is the plan of the army radio service not to use coastal stations, that part of the work being handled by the naval communication service, and the army does not desire to interfere with ship to shore communication. RADIO RE AT. VALUES and the best of Merchandise. OUR PRODUCTS ARE GUARANTEED. We enable you to keep the cost of the building and up-keep of your set at the lowest figures and offer you only the most scientific and reliable products. SAVE ON RADIO VARIOCOUPLEIl-180"' Bakolite tubioE, eroen »ilk wiro $ 2. 95 MOULDED VARIOMETER, ereen silk wire. BDecial 3.45 VAHIOCOUPLER-ISO" Jaco special 1.45 VARIOMETER-ISO" Jaco special 1.45 VERNIER CONDENSER, 2.3 plato 3.25 TJtlCOIL REFLEX TRANSFORMER CSpodfy tui>e used) 1.85 UNITED-AUDIO FREQUENCY TRANSFORMER, 6 to 1 ratio 3.45 MAGNAVOX Loud Speaker 29.75 HEAD PHONES, Long Distance 4.95 22 1-2 VOLT B BATTERY 1.45 PHONE PLUG, Special 39 UV 199 SOCKETS 69 ELECTRIC SOLDERING I RON 2.45 RHEO.STATS, 0, 20 or 40 ohm, special 48 POTENTIOMETER, 2000 or 4000 ohm 69 We offer this extraordinary opportunity to buy your radio supplies at unheard of prices. Take immediate advantage by ordering TOD.-\Y. Serid money order, cash or check. JACKSON RADIO COMPANY Dept. 122, 639 W. North Ave., Chicago, III. F'tr other hnrf/nifiy irritr for O'lr Radio Bulletin