. QST . iddle of a QSO. With nofuses in the circuit, especially in multiple-transmitter installations, one short-circuit putseverybody off the air. If the line voltage is indoubt, there might be available a multitester ofquestionable accuracy (probably not havingbeen used to read 115 volts since last FieldDa3). After poking the prods in the nearestspare outlet, they are usually left there tomonitor the voltage. Only with luck will theyfail to fall together and short. After reviewing the situation it was decidedto plan the power distribution system forthe June, 1954, Field Day. The pr
. QST . iddle of a QSO. With nofuses in the circuit, especially in multiple-transmitter installations, one short-circuit putseverybody off the air. If the line voltage is indoubt, there might be available a multitester ofquestionable accuracy (probably not havingbeen used to read 115 volts since last FieldDa3). After poking the prods in the nearestspare outlet, they are usually left there tomonitor the voltage. Only with luck will theyfail to fall together and short. After reviewing the situation it was decidedto plan the power distribution system forthe June, 1954, Field Day. The problem divideditself into three major categories: (1) generator,(2) feeder layout, and (3) feeder termination. Generator The first problem, the generator, requirescareful consideration. Both single- and three-jihase generators are geneially available. Themost desirable generator is one with single-phase output, especially 220 volts center-tapped. * Lieut. Cmdr., USN, FAW-3 staff, N.\S, Quonset Point,R. \\ I W I .Is iilin patiil iiicliidcs llic iiicntioiKd in llic Icxt and serves as a usefulpiece of slallon and shop e<pii|inietit in the interim be-tween Field Days. However, many groups may fall heir tomilitary-surplus 3-phase 110-volt units, and thesecan be used if a few precautions are observed. Maximum output should not be drawn fromeither a 22{)-volt single-phas:; center-tapped gen-erator or a 110-volt 3-phase generator unlesseach leg is equally loaded. If multiple transmittersare placed on separate legs, the line-voltagefluctuations caused by transmitter keying aregieatly reduced. The engine governor should be adjusted tonot less than 55 line frequency under fullload. If it is set for 60 at no load, thefrequency may drop to well below 50 load and damage to equipment mayresult. The smaller generators are parti(;ularlysusceptible to this fault. A 60-cycle electricclock can be used to check the line frecjuen
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
