. Practical wireless telegraphy; a complete text book for students of radio communication . KEY TRtNSFORMtR Fig. 326—Showing How Defects in the Primary andSecondary Windings of the Transformer May be Located. LOCATION OF TROUBLES 313. Fig. 327—Method for DeterminingLealcage in Aerial Insulators. (/) Quenched Spark Gap Troubles.—It is essential that the discharge gaps of a multiple-jiate quenched gap be air-tight. A leakage of air will be manifested by an irregular sparkdischarge, by a fluctuating wattmeter reading, or by la,ck of normal antenna current asindicated by the aerial ammeter. In gen
. Practical wireless telegraphy; a complete text book for students of radio communication . KEY TRtNSFORMtR Fig. 326—Showing How Defects in the Primary andSecondary Windings of the Transformer May be Located. LOCATION OF TROUBLES 313. Fig. 327—Method for DeterminingLealcage in Aerial Insulators. (/) Quenched Spark Gap Troubles.—It is essential that the discharge gaps of a multiple-jiate quenched gap be air-tight. A leakage of air will be manifested by an irregular sparkdischarge, by a fluctuating wattmeter reading, or by la,ck of normal antenna current asindicated by the aerial ammeter. In general, this leakage can be avoided by compressing the plates with the take-upbolt at the end of the quenched gap frame, but now and then a defective insulating gasketmay leak irrespective of this precaution. In due time the leaking plates will carbonize and short-circuit. The defective gap can be located by meansof a small spark gap testing-rod which is supplied to allmodern Marconi sets. (The testing-rod consists of a cop-per fork mounted on the end of a wooden rod.) With thespark discharging through all the plates of the quenchedgap, the rod is connected across two plates at a time,followed by opening and closing the circ
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
