Radio Digest (Apr 1925-Jan 1926)

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RADIO DIGES T— Illustrated June 6, 1925 Qrebe Binocular Coils Because these are truly fieldless coils, they are not affected by influences from undesired stations. They are thus able to give the Synchropbase that isolation which assures extreme selectivity. Selectivity Synchrophase with battery base. Also supplied without base. — the most important function of a radio set Sensitivity — yes. Clarity of tone — surely. But selectivity — that is the true test of performance. The extreme selectivity of the Grebe Synchrophase has been made possible by the Binocular Coils which, because they have no field, are unaffected by impulses from undesired stations. They keep the set automatically balanced against such interference. These Binocular Coils are exclusively Grebe, as are also the Qrebe S-L-F (straight line frequency) Condensers and Qrebe Volume Control which are outstanding features of the Synchrophase. Ask your dealer to demonstrate these features or •write us. A. H. Grebe & Co., Inc., Van Wyck Blvd., Richmond Hill, N. Y. Western Branch: 443 So. San Pedro St., Lob Angeles, Cal. This Company owns and operates station WAHQ All Grebe apparatus is covered bypatentsgrantedandpending The true worth of a machine lies not in its appearance but in how it performs. TRADE MARK REG. U.S. PAT. OFF.