Radio Broadcast - 1925, February - 113 Pages ... - VacuumTubeEra

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848-6 RADIO BROADCAST ADVERTISER "No fancy gewgaws to attract the eye and cause trouble in the end" CO writes Mr. Henry M. Neely, Editor of O RADIO-IN-THE-HOME. Mr. Neely adds: " The present-day low-loss condenser approaches more nearly to a perfect instrument, the more nearly it approaches the design and workmanship of the Cardwell." Simplicity is a distinctive characteristic of the Cardwell. There is no excessive bulk or weight no intricate parts or complicated assembly. Other points of merit have been praised by many different experts. In fact, Cardwell condensers have received the universal approval of radio editors and engineers everywhere. Cardwell condensers are rugged, free CARDWELL (RADIO UNITS from play, noiseless and remarkably smooth in action. And there is nothing to work loose or get out of adjustment. Cardwell invented the first "low-loss" condensers a name originally applied only to Cardwells to distinguish them from ordinary varieties. Cardwell now makes seventy-six different types a condenser for every requirement. Ask your dealer to show you his assortment. A postcard brings you an education on condensers. Write today for the new Cardwell Condenser booklet. The Allen D. Cardwell Manufacturing Corporation 81 Prospect Street, Brooklyn, N. Y. UNITRADS OF MERIJ) CONDENSERS INDUCTANCES TRANSFORMERS Tfc- Tested and approved by RADIO BROADCAST +
848-c Volume and Clarity with Kellogg Trans formers Radio Frequency Transformer A Radio Frequency Transformer of the aperiodic tqpe suitable for all sets with which tuned radio is frequency desired. Also used for one stage of radio frequency amplification ahead of regenerative sets to prevent re-radiation. Consider these points of superiority : No dope to hold windings in place. Soldered connections. Mounting bracket holds coil at correct angle. Minimum rubber used in form. Lowest possible loss, with greatest transfer of energy. Works with any .0005 condenser. Secondary arranged with suitable taps for biasing features. This transformer makes the construction of a radio frequency set an easy matter, assuring best possible reception with widely vartjing types of circuits, including reflex. Built and guaranteed by Kellogg Switchboard and Supply Co. No. 602 Radio Frequency Transformer at your dealers for $2.35 each. Kellogg Audio Frequence Transformers are the "stepping stones" of modern amplification. Clear, accurate reproduction assured over the entire range of the musical scale. Plainly marked, accessible terminals. It is acclaimed by test to be the best. No. 50 1 Audio Frequency Transformer Ratio 4^ to 1 No. 502 Audio Frequency Transformer Ratio 3 to 1 $4.50 each * Audio Frequency Transformer KELLOGG SWITCHBOARD & SUPPLY CO, 1066 WEST ADAMS STREET, CHICAGO Tested and approved by RADIO BROADCAST
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RADIO ol. 6, No. 4 February. How Mi
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( , me How Michael Pupin Succeeded
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How Michael Puj3ih' Succeeded "665
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The Way of the Transgressor 667 or
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The Way of the Transgressor 669 ver
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What Reflex Means How One Tube is M
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What Reflex Means 673 might be expe
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The International Radio Broadcast T
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The Listener's Point of View 685 CA
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The Listeners' Point of View 687 SI
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The Listener's Point of View 689 [p
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f syncopation The Listeners' Point
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! of ; an Some Experiences With the
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The March of Radio 695 communicatio
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The March of Radio 697 tial product
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The March of Radio 699 PROMINENT FI
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The March of Radio 701 It might be
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The March of Radio 703 year the Phi
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The March of Radio been bothered by
Page 49 and 50: Who Owns Our Broadcasting Stations
Page 51 and 52: Who Owns Our Broadcasting Stations
Page 53 and 54: "NOW, 1 HAVE FOUND. . A Department
Page 55 and 56: ' . THIS "Now, I Have Found. 713 JO
Page 57 and 58: . "You Our Busiest Dav 7'5 Follette
Page 59 and 60: THE LOSS STABILIZING R. F. CIRCUITS
Page 61 and 62: eceiving In the R. B. Lab. 719 It i
Page 63 and 64: In the R. B. Lab. 721 This resistan
Page 65 and 66: How to Build a One-Dial Reflex Rece
Page 67 and 68: How to Build a One-Dial Reflex 725
Page 73 and 74: THE ANTENNA AT STATION 5IT, BIRMING
Page 75 and 76: What We Are Doing With Broadcasting
Page 77 and 78: What We Are Doing With Broadcasting
Page 79 and 80: A Winder for Small Inductances How
Page 81 and 82: A Winder for Small Inductances 739
Page 83 and 84: A Winder for Small Inductances 74'
Page 85 and 86: Problems of Receiver Design 743 sho
Page 87 and 88: Our HAT , Readers Write Us A Word f
Page 89 and 90: The Grid 747 structed as a portable
Page 91 and 92: RADIO BROADCAST ADVERTISER 749 Set
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Radio Broadcast - 1925, February - 113 Pages ... - VacuumTubeEra

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