. QST . volt tubes into twogroups totaling, as closely as possible, the samecurrent. The two groups are then connected inseries, as shown in Fig. 1. If the two branchescannot be matched exactly, a resistor should beconnected across the branch of lesser current tomake the total current of this branch equal thetotal current of the other. The value of the re-sistor in ohms should be R = ii - l2 where I\ is the greater total current and I2 thelesser, in amperes. This system can be applied to any number oftubes greater than 1. A single tube will, of course,require a simple series resistor, as s
. QST . volt tubes into twogroups totaling, as closely as possible, the samecurrent. The two groups are then connected inseries, as shown in Fig. 1. If the two branchescannot be matched exactly, a resistor should beconnected across the branch of lesser current tomake the total current of this branch equal thetotal current of the other. The value of the re-sistor in ohms should be R = ii - l2 where I\ is the greater total current and I2 thelesser, in amperes. This system can be applied to any number oftubes greater than 1. A single tube will, of course,require a simple series resistor, as shown in The value of this resistor in ohms should be R = where I is the rated filament current of the tubein amperes. In this revision of the filament wiring, it isobvious that only one side of one group of fila-ments may be grounded to the chassis. One side ofthis group and both sides of the second groupmust be insulated from the chassis. — IS YOURS ON FILE WITH YOUR QSL MGRJ. CAU.\. 36 QST for A Six-Meter Club Project Andrews Electronic Association Builds 50-Mc. Gearon Production-Line Basis BY JOHN P. DRUMMOND,* W3YHI THE Andrews Electronics Assn., Andrews AirForce Base, Aid., recently took on the con-struction of 6-meter rigs as a club a result, eleven stations are making their50-M(\ debut near Washington, D. C. All butone are entering the ranks through thisproject, and more are expected to follow shortly. This work was undertaken as a result of manyfactors. Members had long agreed that a projectwas needed to stimulate club interest. There wereas many ideas as to what its nature should beas there were club members. Opening of the G-meter band for Technician operation was then inprospect. AEA had previously considered a 2-meter project to provide improved local com-munications for the clubs Windbaggers Net ))ut there was obvious need for more activity on50 Mc. Previous club in sports carraces and in ])roviding communications
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
