. QST . ip Antennas—For Maximum Effi-ciency and Minimum SWR. The Calibrated R-F Wattmeter simplifiestuning of all r-f stages and enables properadjustment of circuit elements and voltages forMaximum Power Output up to 125 watts andhigher powers by sampling methods. A built-in non-Reactive Dummy Load enablesyou to perform numerous Tuning and Adjust- ment Tests—without Putting a Signal on theAir. Now you can moke all of these highly impor-tant measurements and tests with this oneinstrument. The results will amaze you andyoull wonder how you ever got along withouta Matchmaster. Dummy Load- SPECIFI

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. QST . ip Antennas—For Maximum Effi-ciency and Minimum SWR. The Calibrated R-F Wattmeter simplifiestuning of all r-f stages and enables properadjustment of circuit elements and voltages forMaximum Power Output up to 125 watts andhigher powers by sampling methods. A built-in non-Reactive Dummy Load enablesyou to perform numerous Tuning and Adjust- ment Tests—without Putting a Signal on theAir. Now you can moke all of these highly impor-tant measurements and tests with this oneinstrument. The results will amaze you andyoull wonder how you ever got along withouta Matchmaster. Dummy Load- SPECIFICATIONS or better from DC :1to 30 Wattmeter—Useable Frequency Range— From 500 KC to 30 Rating—100 Watts Continuous—125 Watts Instrument Scale—Calibrated to readR-F Watts and Finish—Blue Hammertone. Model 650—52 ohms _ , ^ ^ ^^ pgkModel 651—75 ohms P*C S^ 7*50 $47 BARKER & WILLIAMSON, Inc. 237 Fairfield Ave. Upper Darby, Pa. 91. M odernize with

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915