The Electrical experimenter

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Brandes "Superior" Head Set Complete with head band $5.50. A professional set. within the means of every amateur. 2000 ohms. "Signals vs. NOISES" Brandes "Transatlantic" Head Set Complete with head band. $10. A set for general professional long distance use. 2800 ohms. "ORANDES receivers bring in weak signals," writes an enthusiastic D user, "where other phones bring in weak noises." The reason? Brandes Matched Tone. Two diaphragms, toned at exactly the same vibration, pick wireless "whispers" out of the air and bring them clear and readable into your ear. ORDER NOW WITHOUT RISK Try them out. If you are not pleased in every way, we guarantee to refund your money. Catalog E, which tells the whole Brandes story, sent you for 4c. in stamps. C. BRANDES. Inc., Wireless Receiver Specialists. Room 814, 32 Union Square. New York. N. Y. Brandes Wireless Receivers ** The Receivers With Matched Tone o o o «»—je ^j>_^ ^_iii Mignon Undamped Wave WIRELESS APPARATUS Amateur and Commercial Use This latest Mignon invention is entering a new field in Radio engineering, eliminating the so familiar LOOSE COUPLERS and LOADING COILS, and introduces adjustable DISC-CORES, heretofore considered impossible. DISTANCE RANGE UNLIMITED "Complete Equipment for all Purposes." Represented in all Principal Foreign Countries MIGNON WIRELESS CORPORATION ELM IRA, N. Y., U. S. A. ' Write for Catalogue and mention Electrical Experimenter >".'(. hi-}tcfit by menlioniti;] '"''he Etrctricat F.xt>crimrntrr" -A-hen u-riting to ati-.frUsfrs. ' "
May, 1 91 THE ELECTRICAL EXPERIMENTER EXACT SIZE OF CYCLOPEDIA No. 18 > rf, entirely free. Our bk. m w elcrirlral ciTlop.-
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MURDOCK No. 55 SENSIBLY PRICED SENS
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The Electrical experimenter

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