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The Hammarlund "Hi-Q" Receiving Set which uses box shields oj Alcoa Aluminum Sheet and special corner post moulding. NOW- Fiiier Reception for Amateurs A.UMINUM BOX SHIELDS will help you to get greater dis- tance,better selectivity — closer tun- ing. Their use eliminates or greatly reduces interference. They are ideal for shielding cir- cuits using the new shielded grid tubes. The superiority of Aluminum is recognized by Hammarlund in the design of the "Hi-Q" receiver (above). Two special Hammar- lund Box Shields made of Alcoa Aluminum Sheet are used. Aluminum Company of Amer- ica's standard box shields, de- signed especially for amateur sets, are made of heavy Alcoa Aluminum with satin-dip finish, size 5 in. x 9 in. x 6 in. high. They are easily adapted to smaller sizes. They require no soldering. They embody the ideal combination of high electrical efficiency, mechanical strength, lightness, fine appearance and long life. Be sure to use Aluminum Box Shields, for finer results. If your dealer cannot supply you, send us your order and we will have an authorized dealer ship promptly at $3.50 each (standard size). You simply pay the postman. ALUMINUM COMPANY OF AMERICA 2454 Oliver Bldg., Pittsburgh, Pa. F. A. D. Andrea, Inc., uses Alcoa Aluminum j or Shielding and other parts of "Fada" receiving sets. Expect Better Results When You See This Metal in Radio w HEN you look at ra- ers employ parts of Alcoa dio receivers using Aluminum so that the pur- aluminum shielding or con- denser blades; aluminum castings, front panels, chasses or sub-panels you will know that the manufactur- er has chosen the one metal that most efficiently meets all the widely differing conditions en- countered in ra- dio design. Such famous makers as Atwater Kent, Crosley, Fada, Freed- Eisemann, Grebe, Howard, R-C-A, Stewart-Warner, MR. L. M. CLEMENT Chief Engineer of F. A. D.Andrea, Inc., commenting on shielding says,"In a radio receiver aluminum, because of its electrical conductivity, makes a more efficient shield than any other of equal weight. The ma- terial can be easily drawn into the desired shape and its finish is perma- nent and pleasing to the eye." chasers of their receivers may enjoy the best of radio reception. These makers recognize the superiority of Alcoa Alumi- num. They ap- preciate its ideal combination of high electrical conduct ivi ty, lightness, strength, and beauty. Lookfor Aluminum in the set you buy— when youfind it youmay ex- pect the best results that the ^j/radioengineershaveyet achieved. Sendforacopyof S tromberg - Ca rlson, our new booklet, "Alumi- Zenith and a host of oth- num for Radio." It is free. ALUMINUM COMPANY OF AMERICA 2464 Oliver Building Pittsburgh, Pa. All MININ 'The mark, of Quality in Radio