MOLYBDENUM PERMALLOY FOR INDUCTANCE COILS 



395 



in most respects and have been made approximately 50 per cent 

 smaller in volume by using a molybdenum-permalloy core with a 

 nominal permeability of 125. Table II summarizes data comparing 



TABLE II 



Comparative Size and Weight Data of Typical New and Superseded Coils 



the electrical characteristics, sizes, and weights of coils commonly 

 used on exchange and toll cables. Figure 8 shows the improved 



0.5 1.0 1.6 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 

 FREQUENCY IN MLOCYCLES PER SECOND 



Fig. 8 — Effective resistance-frequency characteristics of typical loading coils. 



