Radio age (Jan 1927-Jan 1928)

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Swifter, finer tuning actionMuminated QtY\\ing beauty, as well as micrometer accuracy, distinguishes the receiver equipped with mar-co controls. Responsive^ to your lightest touch fOJRDIHARl dials seem clumsier than ^— ' ever, .still more inadequate to meet modern conditions . after one experience with the new MAR-CO control. Nothing approaches its swift, searching response except the celebrated MAR-CO vernier dial itself, 500,000 of which have replaced old type dials. But the new con' trol develops the "friction'drive" principle to the utmost, banishing any suggestion of "backlash" or play And when you switch on the light, a soft radiance illuminates, the moving numerals, adding swifter readability to the scale . . , and fascinating beauty to the panel. MAR CO controls fit all condensers. Scales read o to 100, or 100 to o, as preferred. The template supplied reduces panel mounting to a simple io-minutes' diver' sion, whether you are building a new set, or remodelling an old one. The special Mazda lamp runs on your regular "A" battery or on a separate "C" battery. Send for Booklet. Martin Copeland Company, Providence, R. I. MAR-CO illuminated Controls, $3.50 each MAR-CO 4 in. vernier dials (fit any set) nickel plated, $2.50 Gold plated, $2.75 New MAR-CO rheostat dial ... 75c MARCQI^natedQnOmls