CANKirR ir.i.fu'iioxy (h\ men roi.i.icr. i.ixi.s kw 



sliil'ti'd Id lorirct lor wiri.itioiis in iIr- rmipliiii; win- iiKliuM.iiui' and 

 rap.uiiN Inr ililTiri-nt iiisl. illations. \"\\:,. 20 illiisiiati-s a tspical 

 farruT ti'iiniiial installation rmplox inn ''h- win- coupling,' nu'thod. 



The onK point in l.uor of tlir wire couplini; as coniparrd with the 

 condenser coiiplini; is the lad liiai for power line^ ol \oltai;e> liii;her 



l-"ig. 17 — Coupling Wire Tuning Unit 



than '.i'.i K.\'. it is somewhat cheaper. On the other hand condenser 

 coupling is much more etiticient, thereby increasing the range and 

 reliability of the system. It also permits high quality transmission, 

 the transmission through it is not affected by small variations in 

 frequency, and the component parts are of constant value determined 

 at the time of manufacture and require no adjustment at the time 

 of installation. In addition to these advantages the inspection and 

 maintenance of the condenser is easier than for the coupling wires. 



Pr()Ti;( TivE Mk.\sires 



In considering the problem of safety to the operating personnel 

 and the equipment from the power line voltage, the normal insulation 



