Radio mirror (Jan-Oct 1923)

RADIO DIGEST— Illustrated September 22, 1923 ORDERS FOR PARTS CLOG DIGEST MAIL CLASS H GETS HEAVY ONSLAUGHT FROM FANS Appearance of Sixteenth Consecutive Coupon Shows Readers Have Been Saving Whole Series SPECIAL REWARD OFFER | Coupon Number 17 U This Special Reward Coupon g§ appears each issue in Radio m Digest until further notice. §| When sent in. accompanied §g by necessary remittance, ac ^ cording to the rules govern g ing same, apparatus can be ^ secured. See apparatus list m and rules of offer below. gg Save Me — I Am Valuable | With the publication of the sixteenth coupon of the special reward offer for regular Digest readers, as was expected, during the past week bags of mail poured into the publication's office containing letters from thrifty fans who had been eaving the whole series in order to secure one of the many valuable accessories listed under Class H, and requiring sixteen consecutive coupons. Now coupon No. 17 appears. Even more orders from Radiophans are expected this week as a result o'f many readers starting with the second coupon of the series rather than the first. In the meantime letters continue to flow in from fans who desire Radio parts listed in the classes of items requiring less coupons than those in Class H. The onslaught of orders, however, will not delay shipments to readers, as the special offer department is fully prepared to meet the large demand. Subscribers are urged to be careful in sending coum« o~.^ rerrnttTnees, to follow carefully to Remember be emphasized to those king advantage of the l '■ that the coupons <i'teiu must be numbered for example, 1, 2, 3, and 6. The number of coupons necessary iJii>the cash remittance, jf course, depen jn the item sought by the reader. Tj .e is no limit to the number of series turned in by any one reader. Another point to remember is that cash, checks arid money orders but no postage stamps will be accepted. To make selection more simple the items have been divided into eight classes, each class depending on the number of consecutive coupons and amount of cash remittance necessary. The complete list of parts obtainable, together with the number of coupons required, will appear here in next week's issue. RADIO PREDICTS QUAKE (Continued from page 1) At the luncheon Dr. Day addressed were Ralph Arnold, chairman of the society. Dr. Perry O. Wood, research associate of the Carnegie Laboratory, who has charge of the earthquake experimental station at Mt. Wilson, Calif., A. M. Strong, a noted geologist, Dr. Ford Carpenter, writer and authority of meteorological subjects, and Dr. W. S. Kew of the United States Geological Survey. Jap Disaster Proves Radio Turning, however, from the suggestion for warning of quakes to the actual part played by Radio in the recent Japanese catastrophe, it can be said that commercial Radio was tried under very difficult conditions, and was not found wanting. Where all other means of communication failed, a little Jap Radio operator stuck to his post, repaired damages to his station, and gave the world information of the great earthquake. Out of the appalling disaster has emerged proof of the unfailing dependability of Radio and a hero whose name will go down in history. When Tokio and Yokohama were first rocked by earthquakes and swept by flames, the cables and naval Radio stations were put out of commission. Iwaki Unit left Intact At Tomioka, 155 miles north of Tokio, and at Haranomachi, 178 miles north of Tokio, the great 680-foot towers were, by some strange freak of the quakes, left standing. These two plants are together known as the Iwaki unit, the transmitting equipment being at Haranomachi, while the receiver and the key controlling the transmitter are at Tomioka. Taki Tonemura, operator in charge of the Iwaki plant, is the man whose name will go down in history as one of the outiding heroes of the Japanese catastrophe. Tonemura is the only man at the station that understands English. Even he has only a limited knowledge of the tongue. While the earth rocked and swayed, he for three days and nights sat at his key and flashed to the outside world the tidings of destruction and the urgent appeals for food and medical aid. Sends Messages as Earth Rocks His messages, picked up by the big receiving station at Bolinas near San Francisco, operated by the Radio Corporation of America, were for seventy-two hours the only source of information for the press associations and newspapers of this country. In the intervals between sending, he laboriously translated into English some 8,000 words of Japanese, and just as laboriously spelled It out, letter for letter, in the International Morse Code. His handicap can better be appreciated when it is stated that this is not the code ordinarily used by Japanese operators. His tenses were badly twisted and frequently, unable to express himself in English, he reverted to Japanese for whole sentences at a time. Time after time his story of the disaster was interrupted by heavy earthquake shocks which shattered parts of the apparatus and tore the wires from their connections. In one instance it was four hours before the damage could be repaired, but every time Tokemura replaced a part or traced the break and stuck to the job. Cables Out of Commission Without Radio and Tokemura, it would have been from twenty-four to fortyeight hours before news of Japan's plight could be sent to the outside world and relief supplies started on their way. The Pacific Commercial cable from Japan to Boning Island, reported submerged, and thence to Guam, was put out of service by the earthquake. Messages are now routed east via Manila, Shanghai and Nagasaki, or west via London. It remained for Radio to carry the official dispatches and news reports across the Pacific to North America, and Radio has handled a tremendous amount of traffic. Tomioka for some time had no means of communication inland. At the suggestion of the Japanese ambassador at Washington, however, a courier service was established to Tokio and now a regular schedule is in operation. A statement that communication was open to Tokio, by the state department, led some to believe that line wire communication between the station and Tokio was established. However, communication used in the old sense, means that the roads were open. According to the last reports no wires have been re-established. Broadcast to Sea of Dangers Radio was by other ways the means of getting news of the disaster to the new world on September 4. The master of the S. S. President Jefferson Radioed to his Shanghai office from the port of Tokohama direct. The American consul put the message on the cable for Secretary Hughes in Washington. Facts relating the unsafe condition of the harbor at Yokohama were immediately broadcast by the naval hydrographic office there, that all ships might be warned of the hidden dangers in the harbor, the absence of lights, etc. Here Radio again served in its first recognized capacity, that of protecting life at sea. V. S, Naval Radio Makes ▼•<"*• The U. S. naval forces in Japanese waters are rendering official emergency service via Radio. The American Asiatic fleet is now at Tokohama and the destroyer Borie is stationed at Nagasaki as a Radio relay ship. Messages from the American flagship are picked up by the Borie, relayed to the naval Radio station at Cavite and thense to the naval station at San Francisco. Government west bound messages are sent from Washington via Annapolis Radio station or commercial land lines to San Francisco, where they are relayed via Honolulu, Guam and Cavite to the Borie and thene_ to the American fleet off Yokohama. The TJ. S. S. Sacramento is stationed at Woosung, CONTENTS Radio Digest. Illustrated, Volume VI, Number 11, published Chicago, Illinois. September 22, 1923. Published weekly by Radio Digest Publishing Company, 123 West Madison Street, Chicago, Illinois. Subscription rates, yearly. Five Dollars; Foreign Postage One Dollar additional; single copies, Ten Cents. Entered as second-class matter at the postoffice at Chicago, Illinois, under the Act of March 3, 1879. "All the Live News of Radio" 1 to 9 Flewelling Answers to Queries 4 On the Air in France and England; An Evening at Home with th§ Listener In; Receiving Record Hook-Ups I 5 The Week's Advance Broadcast Programs 7 The Antenna Brothers, Comic Strip 9 Editorials ; Indi-Gest ; Condensed by Dielectric 10 First Step for Beginners in Radio, Chapter XVIII — Using Alternating Current on Tubes, by Thomas W. Benson 11 Simplex Picture Diagram, English Crystal and R. F. Amplifier Circuit 12 How to Make Loop Aerial De Luxe, by H. J. Marx 13 Human "Earful" Measured by Aid of Radio Tubes, by C. W. Tucker 15 R.D.-98, Three Tube Radio Frequency Circuit; The Reader's View; Reviews of Books IS Receiving Set Built in a Match Box; Other Kinks 17 Questions and Answers , 18 Radiophone Broadcasting Station Directory, Part II — Station Schedules 19 Radio Illustrated, a Page of Pictures 20 Looking Ahead King Miloplex I — The Elaborate Excavations in Egypt become insignificant in comparison to the discovery of the Miloplex circuits. There are three of them, each one better than the last. We promised to divulge the first of this family of circuits this week but didn't have the space. But next issue it will be present with bells on. Simple, efficient, and not expensive. Build a Miloplex. How to Test Your Set — A Cracker-Jack Good Article by Thomas W. Benson next week. Mr. Benson will tell how to "shoot trouble" and give advice worth keeping for reference when your set goes dead. The Story of Radio for Novices, Beginning Next Issue — A series by Marvin W. Thompson, known nationally as a Radio engineer and writer, and now associated with the Digest as a member of its staff. Tell your beginner friends to read Mr. Thompson's series starting with the first chapter. Notes on the Reflex De Luxe — by H. J. Marx. This article, to appear in the September 29 issue, will tell the latest improvements on this popular set. It will include a simplified circuit for use with a loop aerial. Mr. Marx is planning a series of articles on building a Super-Heterodyne receiver. Watch for this! Understood by Everybody. What? The Simplex Diagram, of Course. Next week it will illustrate the popular single tube super-regenerative set. You can't wire wrong with a Simplex Diagram. A Book-Type Condenser You Can Make — Easy and few tools required. Read this how-to-make article along with other kinks next week. R.D.-99, an Improved Ultra Audion Hook-Up — Has two stages of audio frequency amplification and a reputation for reliance. Wired for jacks, too! See it next issue.* RADIO SPELLING BEE MAKES BOW IN WEST Newsstands Don't Always Have One Left 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 M. 0. for Five Dollars (Six. Foreign) for One Year's Subscription to Radio Digest, Illustrated. Name Address City 8tat» "Exam" Queries Transferred from Blackboard to Air SACRAMENTO, CAL. — Examination questions for California high school pupils have been transferred from the blackboard of the little red school house to the more up-to-date Radio broadcasting station. The first Radic spelling bee in America, and probably the first in the world, was announced recently by Will C. Wood, state superintendent of public instruction. Superintendent Wood will dictate the examination material to high school students in every section of California by means of Radio. The test will be limited to graduating classes and will take place at a date to be set in November. Operator of WNAC Resigns to Sell Radio Apparatus BOSTON, MASS.— Sam Curtis, who for the past year has been chief operator of the WNAC, The Shepard Stores station here, has resigned and will take immediate charge of the new Radio department established by the C. C. Harvey Company, dealers and manufacturers of pianos. When the Shepard Stores started their Radio department Mr. Curtis was placed in charge, and when John Shepard 3rd. established WNAC, Curtis was made chief operator. Curtis was for a number of years a naval Radio operator and later connected with the Radio Corporation of America. ready to relay Radio messages. The naval service can now deliver official dispatches to Yokohama within twentyfour hours. Many Radio experts feel that the terrible disaster and the severing of communication out of Japan will aid materially in establishing better Radio service between Nippon and the world. The policy of the Japanese government has been to control Radio, although American commercial companies have been endeavoring to provide better stations and transmission for some time. It is now hoped that an opportunity will be given American companies to establish highpowered stations in Japan. Ready for Immediate fl]ft®& Delivery— iMititfiGES0* ALL PARTS FOR THE Acmedyne Circuit as described by Mr. Lawrence Cockaday in the August issue of "Popular Radio." employed in the wonderful Melco-Suprerne Receirer. Tuned Radio-Frequency at Its Best Telos Vario-Transf ormer $8.50 Telos Variometer $6.00 AMSCO Compensating Condenser $3.00 Complete knock-down parts for 3Ielco-Supreme, including drilled engraved Baketite panel, solid mahogany cabinet, and three No. 201-A fiJQrt Badioirons «DO \J All goods absolutely guaranteed by manufacturer aDd ourselves. Shipped immediately, prepaid, on receipt of purchase price. Writ© for price list on our complete line of Quality apparatus. RADIO & MECHANICAL TRADING CORP. 23 Warren Street NEW YORK CITY WD-11 and WD-12 Tubes Repaired WDII or WD-12 $3.50 C-300 or UV-200 2.75 C-30I or UV-201 3.00 C-302 or UV-202 3.50 C-30IA or UV-20IA. . 3.50 Moorehead Detectors 2.75 Moorehead Amplifiers 3.00 DV-6 or DV-6A 3.00 Also the new UV199 3.50 NEW DX 1 % VOLT TUBES . 4.00 All tabes guaranteed to work like new Mail Orders Given Prompt Attention "24 Hour Service" RADIO TUBE CORP. 55 HALSEY STREET NEWARK, N. J. Tubes Sent Parcel Post, C. O. D. 1