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

More documents

Recommendations

Info

750 Radio Broadcast f B+ P S P S FIG. 5A like manner on the vertical left border line or vice versa. Beginning at the lower wavelengths, the dial position for the stations tuned-in on the receiver are located by cross-reference continuing until the maximum setting has been obtained. A line is then drawn from point to point resulting in a continuous curve. Not all curves will be very straight as the settings at the lower wavelengths are crowded closer together than at the higher settings. The curve shown in Fig. 8 is an exaggerated example to serve as an illustration. A more correct form is shown in Fig- 7- BATTERY SWITCHES FOR TESTING SETS MAKING comparison tests between radio sets, it is advantageous to have a double throw INswitch by which either of two sets may be quickly connected to the antenna and ground and to the batteries. The arrangement of a switch to do this is complicated by the fact that various manufacturers use different methods of connection between the A, B, and C batteries. Considering only two plate voltages and one bias voltage, a nine-pole double throw switch would seem to be required in order to prevent short circuit of the FIG. 58
RADIO BROADCAST ADVERTISER 751 Graph showing how the regenerate effect in the Model L-2 Ultradyne increase! as the strength of the recede decreases * on the, jfoud Gets Distance The ULTRADYNE Kit consists of 1 Low Loss Tuning Coil, 1 special Low Loss Coupler, 1 type "A" " Ultraformer, 3 type B* Ultraformers, 4 matched fixed Condensers. To protect the public, Mr. Lacault's personal monogram seal (R.E.L.) is placed on all genuine Ultraformers. $30.22 T TNLIKE other Super-radio receivers, the Ultra- ^ dyne, with its exclusive use of the "Modulation System". and special application of regeneration, is capable of detecting and regenerating the faintest signal, making it audible on the loud speaker. The regenerative effect in the Ultradyne increases as the strength of the signal decreases, until the signal becomes so weak that no amount of amplification will make it audible. A radical advance in radio engineering and the latest development of R. E. Lacault, E.E., A.M.I.R.E., Chief Engineer of this Company and formerly Radio Research Engineer with the French Signal Corps Research Laboratories. You will marvel at the unusual selectivity, sensitivity and range of this new Model L-2 Ultradyne. Write for descriptive circular How to Build and Operate the ULTRADYNE 32-page illustrated book giving the latest authentic information on drilling, wiring, assembling, and tuning the Model L-2 Ultradyne Receiver. SO* MODEL L-2 Phenix Radio Corporation 5-7 Beekman Street New York City . .J Tested and approved by RADIO BROADCAST
Page 1 and 2:
RADIO ol. 6, No. 4 February. How Mi
Page 3 and 4:
( , me How Michael Pupin Succeeded
Page 5 and 6:
. the '; tory. ; Early : scholar. a
Page 7 and 8:
How Michael Puj3ih' Succeeded "665
Page 9 and 10:
The Way of the Transgressor 667 or
Page 11 and 12:
The Way of the Transgressor 669 ver
Page 13 and 14:
What Reflex Means How One Tube is M
Page 15 and 16:
What Reflex Means 673 might be expe
Page 17 and 18:
: crystal ! toward : this What Refl
Page 19 and 20:
The International Radio Broadcast T
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
The Listener's Point of View 685 CA
Page 29 and 30:
The Listeners' Point of View 687 SI
Page 31 and 32:
The Listener's Point of View 689 [p
Page 33 and 34:
f syncopation The Listeners' Point
Page 35 and 36:
! of ; an Some Experiences With the
Page 37 and 38:
The March of Radio 695 communicatio
Page 39 and 40:
The March of Radio 697 tial product
Page 41 and 42: The March of Radio 699 PROMINENT FI
Page 43 and 44: The March of Radio 701 It might be
Page 45 and 46: The March of Radio 703 year the Phi
Page 47 and 48: 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: RADIO BROADCAST ADVERTISER 749 Set
Page 95 and 96: RADIO BROADCAST ADVERTISER 753 No.
Page 97 and 98: RADIO BROADCAST ADVERTISER 755 d i
Page 99 and 100: RADIO BROADCAST ADVERTISER 848-a f
Page 101 and 102: 848-c Volume and Clarity with Kello
Page 103 and 104: RADIO BROADCAST ADVERTISER 848-* Ne
Page 105 and 106: 848-5 *W"OU tour the world in a nig
Page 107 and 108: RADIO BROADCAST ADVERTISER 848-i Da
Page 109 and 110: RADIO BROADCAST ADVERTISER 848-fe '
Page 111 and 112: RADIO BROADCAST ADVERTISER 848-m Th
Page 113: Tested anrl nnnrovpfl hv R \nin RRm
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?