176 IIBLL SYSTEM TllCflXlCtL .lOLRX.II. 



Power Company. Fig. 2(5 illustrates the simple character of the 

 assembled units and freedom from controls. The right hand l)a\' 

 is devoted to power control apparatus with space reser\ed for the 

 135 cycle remote control f(|uipnienl when it is employed. The left 



I in. 17 I ypical Installation of Coupling Panels 



liand bay iiicludes the transmitting and receiving circuits, the higli 

 and low pass carrier freijuency filters and the voice frequency and 

 D.C control circuits. Ik'ginning at the top of this bay, the first 

 panel, which is blank on front, carries the system terminal, block 

 to which all wiring except the power supply is ct)nnecled. The second 

 panel is the high pass filter; the third panel is blank. The fourth 



