580 BELL SYSTEM TECHNICAL JOURNAL 



The derived ilf-type variables of any class are gi\cn directly in 

 terms of the "constant k" variables of that class anfl the parameter 

 m !)>• the i^cnoral relations 



J, m-{Uk + {l-m'){Uk-+Vk')\ 

 ^'^ {\ + (\-rn')UkY+{l-m^fVk''' 

 and (2()) 



m-Vk 



F„ = 



[\+{\-vf~)Ukf+{\-m-)-Vk-' 



This assumes that the .l/-t>pc has the same grade of coils and con- 

 densers as its "constant k" prototype. The parameter m has a 

 different formula determining its value for each class, the general 

 relation being (neglecting dissipation) 



where /^ is a frequency- of maximum atlenualiim nf tlie J/'-t\|)e. The 

 particular relations for the al)()\-c four classes follow. 



Loii' Pass 



High Pass 



' = Jl-|t. (28) 



-4 



Lou'-and-lli'^h Pass 



Band Pass 



2. Terminal Losses 



Nl(-I)(-f) 

 N<(-fi)(-S) 



(29) 



(30) 



(31) 



The general teiiiiin.d lusses A„ and Li, an- (lelrrmiiu'd i)\' {(i) froii: 

 the absolute values of the terminal factors /•'„ and /•"),, which taclor? 

 we have asssumcd apply to the sending and receiving ends, res|iecli\ el.\-, 



