Radio Digest (July 1924-Apr 1925)

RADIO D I G E S T— Illustrated July 12, 1924 TAXIS MAY SOON BE FITTED WITH RADIO DISPATCHERS IN CONTACT WITH ALL CABS SUPER-HETERODYNE IS AUTO COMPANION Birmingham to Mark Trial in New Field of Practical Use for Airwaves BIRMINGHAM, ALA. — Leading taxicab nanies of Birmingham may soon equip their cabs with Radio, while some of the even more progressive uixioab companies contemplating installing Radio sets by s of which their cabs may be dished. W. O. Arzinger, Birmingham Radio eni r, has been working for some months no the design of a transmitting set to be used for dispatching taxicabs and receives to be placid within the cabs. He announces that his preliminary designs are now complete and that they work to perfection. With one of these transmitting sets installed in the central taxicab office, and with each taxicab equipped with a receiving set, the central or main office at any time can reach anyone or all of their cabs," Mr. Arzinger said. Could Reach Passenger in Emergency "And with the use of these sets, a pasgineer, has been working for some months station, or on any other occasion, for that matter, may be communicated with," he continued. Asked if these sets would be very expensive, Mr. Arzinger replied that they wnuld not. "An oufit for the central (•ffice will cost something like $100, while sets for the individual cabs will only cost about $50 each," he said. Mr. Arzinger said that at least one taxicab company would install the sets in their cabs before attempting to market the outfits generally. "Since I live in liirmingham and expect to manufacture here, I want the taxicabs of Birmingham to be the very first in all the world to be equipped with Radio," Mr. Arzinger continued. Monday Opera Talks CINCINNATI. — Descriptive talks about the operas to be g^ven every Monday • veiling at the Zoo and broadcast through the Crosley Radiocast WLW, are given the same day at 4:00 p. m. Central time. The description is given by Mrs. Fred Smith, wife of the studio director of WLW. A super-het is companion to Miss Mary Moor, New York City, while she tours the East by automobile. P. & A. Photo WBAP Eliminates Evening Concerts Until September FORT WORTH, TEX. — WBAP, the Star-Telegram, Radiocast here, has started its summer vacation on night musical concerts, which will continue until September 15. While the night concerts are temporarily discontinued, a special noonday concert will be inaugurated. It has been found that during Texas summers, musical reception is much better in midday than at night. The usual hourly market service and the four evening periods devoted to baseball, will be continued. Distant listeners have been unanimous in their acclaim of WBAP'S summer reach. Perfect! THE LOW LOSS GENERAL INSTRUMENT CORPORATION GROUNDED ROTOR CONDENSER LABORATORIES Because actual tests have proved that dielectric USE IT losses have been practically eliminated. This makes it possible for your receiving set to surprise ypu with a new power. RECOMMENDED A Professor of Radio Engineering in instruct BY A RADIO ing his pupils said that to attain results such PROFESSOR as no other variable condenser will produce you must use the Low Loss General Instrument Grounded Rotor Condenser. REPLACE YOUR If you are really anxious to "hear the difference" OLD CONDENSER to get greater selectivity, more distance and a remarkable increase in volume, replace your old condenser with the NEW LOW LOSS GENERAL INSTRUMENT ( CORPORATION GROUNDED ROTOR CONDENSER. You'll hear the difference. Minimum Maximum Type 43X 11 Plate 5 MMFD. .00025 MFD $4.50 Type 46A 13 Plate 6 MMFD. .0003 MFD 4.50 Type 46D 21 Plate 9 MMFD. .0005 MFD 5.00 Type 46F 43 Plate 15 MMFD. .001 MFD 5.50 AT YOUR DEALER Otherwise send purchase price direct to us and you will be supplied. General Instrument Corp. 423 Broome Street [IjQ NEW YORK CITY ;•** '*■ ->'<"'. ,'.r.-i ,1"' -.. V71"",. ■■""•y^; . 4,'rv.T k ?' v;>'' '. ' ;v c'-'-V '••■'■' v-. •' * •'■■•'•■-;' •■' Cv ^A.~-»-v:?~ri'. -»»k^v.'V.::"'; :"'V^'.."'^^ V ...C' -Jy-: " ■''■'." t v ■■ y i m m lS> • ^ % £ T*\ .:*-' '^ '■■:■■'> >.'■-.,. I'^WS £ Announcing — The NeW Models — each a leader in its line Crosley 51-A, $14.00 „ ™*™"J*S*' Crosley 50-A, $18.00 Crosley 50, $14.50 Guaranteed Satisfaction at a Reasonable Price CROSLEY 50. A new one tube Armstrong Regenerative Receiver. We believe this to be the most efficient one tube receiver ever put on the market. Uses any standard storage battery or dry cell vacuum tube Price $14.50 CROSLEY 50-A. A new two stage Audio Frequency Amplifier to match the new Model 50 Receiver. When used in connection with the Crosley Model 50 Receiver, it gives the equivalent of a three tube regenerative receiver. Long range on loud speaker Price $18.00 CROSLEY 51. In twenty-four days this receiver became the biggest selling radio receiving set in the world and it holds that position today. It uses two standard storage battery or dry cell tubes, regenerative detector and one stage of audio frequency amplification. Will bring in local stations on the loud speaker at all times, and under average conditions will also bring in distant stations on the loud speaker Price $18.50 CROSLEY 51-A. A new one stage Audio Frequency Amplifier to match the Model 51 Receiver. Combined they give the equivalent of a three tube receiver. Long range on loud speaker Price $14.00 CROSLEY 52. A new three tube Armstrong Regenerative Receiver. It is unusually efficient, will provide loud speaker volume on distant stations under practically all conditions, and is in every way an ideal receiver for the home. Extra phone jack to plug in on two tubes Price $30.00 CROSLEY 51-P. This is our new portable set. It is the Crosley Model 51 two tube receiver mounted in a leatherette covered carrying case, battery space and all"self-contained. Convenient for home or traveling Price $25.00 CROSLEY TRIRDYN 3R3. This three tube receiver gives the efficiency and volume of a five tube receiver. Incorporating Radio Frequency Amplification, Regenerative Detector with one stage of Reflexed and one stage of straight Audio Frequency Amplification. Can be calibrated accurately — stations logged and returned to at will. Used on outdoor or short indoor antenna and is, we believe, the most efficient and sharpest tuning receiver on the market at any price for bringing in long distance stations. Received country-wide approval of radio experts. ...Price $65.00 CROSLEY TRIRDYN 3R3 SPECIAL. This receiver is exactly the same as the Trirdyn 3R3 except the solid mahogany cabinet is larger to contain accessories and "A" and "B" Batteries required when standard dry cell tubes are used Price $75.00 Write for Descriptive Circular For Sale By Good Dealers Everywhere The Crosley Radio Corporation Powel Crosley, Jr., President 7492 Alfred Street CINCINNATI, OHIO Licensed under Armstrong U. S. Patent No. 1.I1J.H0 Crosley Owns and Operates Broadcasting Station • .-■;*: . .■:'•--: 0 '•■■: " y :■■'■ ■'. " i St. • ■/■:■■ ,n W LW t^JI^ ;;1 ■.."■.■v.: :,.:■,. ,■■■ i I .. '; '■-*" R.idio Products. V. ' *"'-'•'' -''■''■■ '■■$■*:';.' ■$$ ''. &7~:? ■*• '•