58 



BELL SYSTEM TECHNICAL JOURNAL 



Capacity and Resistance Characteristics 



The capacity and resistance characteristics plotted against frequency 

 for a condenser of the type illustrated in Fig. 6, with a film formed to 

 46 volts d.c. are shown in Fig. 12. Curves No. 1 show the values 



1600 



-^ 1 1 



CURVES © INITIAL VALUES | 



CURVES(D VALUES AFTER ONE YEAR OF 

 CONTINUOUS SERVICE 



400 800 1200 1600 



FREQUENCY-CYCLES PER SECOND 



2000 



Fig. 12 — Effect of frequency on capacity and resistance of an aluminum condenser 

 formed to 46 volts and operated at 28 volts 



«i 



1000 



< 5 



F0.4 5 800 



CEO.B ^ 600 



ti02 t 400 



go. I 



< 200 



o 



1 1 1 1 1 



CURVES© INITIAL VALUES | I | 



CURVES (2) VALUES AFTER ONE YEAR OF CONTINUOUS SERVICE 



400 800 1200 1400 



FREQUENCY-CYCLES PER SECOND 



2000 



Fig. 13 — Effect of frequency on capacity and resistance of an aluminum condenser 

 formed to 100 volts and operated at 66 volts 



measured at the time the condenser was put in service, and curves 

 No. 2 show the values after one year of continuous service on a 28- 

 volt battery with maximum voltage of 32. A second set of curves 

 for a similar condenser formed to 100 volts and operated on a 66-volt 

 battery, maximum 75, are shown in Fig. 13. 



