COMMON BATTERY ANTI-SIDETONE SUBSCRIBER SET 249 



C 



M f 



Fig. 5 



1 "WT^ 



(i2r 



lA T 



L 



I 



'•2A 



li 



E, = E,2[Q Q|e2=Ei2 



la Dj iiS 





Fig. 6 



A 



tCI2) 

 MA 



B 





■^MT^-, 



,112) ■ 

 •■SA 



-k]D4<ID^ 



c 



E, =E2 



Fig. 7 



B 



I — oro^ 



MS 

 L V 



\ T 



^W^ , 



(2) 

 2S 



R 



I 



ll^ s 



I — nm^ 



r(2) 

 MA 



B 



(2) 

 2A 



• T*.^' tV'^' tV-^' 



L MAv '2A _n ^3A 



^^m^ — I 



t(2) 

 ^3A 





Fig. 8 



l[|^ = I^']-<---BY RECIPROCITY THEOREM -->-i{^^ = I2a 



I OJM^ 



lA 



I 



\ B 



-+• 



'••3A 



^(1) 



^3A 





XS «M] '^ 



Fig. 9 



Group III — Components of transmitting E.M.F.'s and assumed mesh currents 



