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

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848-rf What Reliable Radio Means to You Guaranteed Radio Products Standard Audio Transformers 3 to 1 Ratio, typeR-12.. .$4.50 5 to'l Ratio. typeR-21.. . 4.7S 10 to 1 Ratio, type R- 13 ... 4.75 Power Amplifying Transformers (Push-Pull) Input type R-30 $6.00 Output type R-31 6.00 Raul&nd-Lvrtc A laboratory grade audio I transformer for music i lovers. R-500 $9.00,3 Universal Coupler Antenna coupler or tuned r. f. transformer. R-140 $4.00 A3 assurance that,when you try out a hookup, you can rely on your instruments to give you a fair test. Q A knowledge that each part has been put to such searching tests that its proper performance, under any coiditions, is assured. (\ In short, a conviction that each individual part will continue to do its work year after year. The RADIO KEY BOOK will acquaint you with the essential facts of modern reception. Ten cents coin or stamps brings the KEY BOOK RAULAND MFG. CO. Pioneers in the Industry 2652 Coyne St. Chicago Self-Tuned f *JfcJ!K R. F. Transformer J~s= IN Wound to suit the Ve< fr-V tube. R-199$5.00. R-201A$5.00 Long Wave Transformer (Intermediate Frequency) (15-75 kc.) R-110 $6.00 10,000 MeterOOkc.) Transformer Tuned type (filter or input). R-120.. $6.00 Radio Frequency Coupler (Oscillator Coupler). R-130 $5.00 Super-Fine Parts Consisting of three R-110's. one R-120 and one R-130 $26.00 All-American Reflex Receivers (Mounted but not wired) All-Amax Junior (1-tube) $22.00 All-Amaz Senior (three -tube) $42.00 ALL-AMERICAN Largest Selling Transformers in the World Tested and approved by RADIO BROADCAST
RADIO BROADCAST ADVERTISER 848-* Newport Owners Know Wkat Tonal Quality is! The Tonal Quality of tKe Newport brings ineffable thrill of good music. to them the They* have experienced those delightful little runs, fine gradations, and double stop vork in Kreisler's "Caprice Viennois" -which are so clear, vell defined, and ungarbled in the Newport. The thunder of the organ as it runs the gamut of its mighty diapason is not new to them. They* parade across the theatres of their minds ev^ery* evening all the brilliance and charm of the virtuosi. They catch with ease those slight inflections of the voice that often mean so much when famous men speak. They* make their WevOports perform the acid test of Tonal Quality*. They dial into the militant swing of Sousa's "El Capitan" or the "Stars and Stripes Forever." 4 That they can distinguish the high trebles, the deep bass, the Various instruments that go to make the action-stirring whole of this famous orchestration, is not nov*el to them. They 1 know what Tonal Quality is! The Newport is a Good Receiver Built in a Piece of Fine Furniture Newport J\aaio Cor) 'ZSO West ff-f&Sfreet, NewYorkCity 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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. the '; tory. ; Early : scholar. a
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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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: crystal ! toward : this What Refl
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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
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Who Owns Our Broadcasting Stations
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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
Page 93 and 94: RADIO BROADCAST ADVERTISER 751 Grap
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Radio Broadcast - 1925, February - 113 Pages ... - VacuumTubeEra

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