MOLYBDENUM PERMALLOY FOR INDUCTANCE COILS 



401 



In Fig. 15 data are presented illustrating the <2-frequency charac- 

 teristics that can be obtained on typical coil designs using the new 

 material in the frequency range from 300 cycles to 200 kc. The 

 characteristics shown apply to coils wound on three sizes of cores that 



Fig. 13 — Comparative size of equivalent 1939 and 1922 cases. 



are suitable for use in this range. For comparison, similar charac- 

 teristics are also included for coils using cores of equal size but made 

 of permalloy and electrolytic iron powder. These data include all 

 effects on Q resulting from winding capacities and losses, which have 



