. QST . onnected externally acrossthe binding posts. \Yhen using the balun for 10 meters, the 1000-/x/if. portion of the series capacitor is opened. In conjunction with the bridge, the balun de-scribed can be used over a ±500-kc. range on 20meters and ±1 Mc. on 10 meters, without re-tuning. Conclusion The simple antenna bridge described here canbe used for almost any tj^pe of impedancemeasurement that the amateur is called upon tomake. The possibilities in this regard have onlybeen touched upon in this article, but the manyapplications have been well covered in amateurliterature. There is
. QST . onnected externally acrossthe binding posts. \Yhen using the balun for 10 meters, the 1000-/x/if. portion of the series capacitor is opened. In conjunction with the bridge, the balun de-scribed can be used over a ±500-kc. range on 20meters and ±1 Mc. on 10 meters, without re-tuning. Conclusion The simple antenna bridge described here canbe used for almost any tj^pe of impedancemeasurement that the amateur is called upon tomake. The possibilities in this regard have onlybeen touched upon in this article, but the manyapplications have been well covered in amateurliterature. There is only one warning — do not,under any circumstances, leave the bridge in thecircuit while the transmitter is in use. The bridgeis a measuring instrument, not a device formonitoring the performance of the transmitter. A\2DIT and W2DAH both live on Long Island. 110 Buy r^ Rotary or *«« v/ashgof o --^^rVenerotors. ^^s^. BocU Poc^ ^ WOT Co*. SHAFT COUPLINGS
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
