COMMON BATTERY ANTI-SIDETONE SUBSCRIBER SET 249 



M r 



Fig. 5 



Fig. 6 



IS 



B 



I 



^^m^ 1 



t02) 

 '■2S 



IV 



I — nm^ 



1 I A 



^W3 «M 



K5>K5>HH 



c 



E,= E2 



■KK^K^D^ 



E| =E2 



Fig. 7 



A 



I ^W5^ 



l(2) 

 MS 



I 



■-ly^K^^ 1 



»^ 



(2) 



I OKJ^ 



' \ ^W3 "M 



MA 



B 



l(2) 

 l2A 



l(2) 

 ^3A 



-^ s 



<3>H 



\ ^XS ^M - 



-^ s 



Fig. 8 



l(|^=llI^-<---BY RECIPROCITY THEOREM -->-l|^'' = I^'^ 

 \ \ 



A N. B A \ B 



I OJM^ 



+ - 





Ms 



-^"PP 1 



'2S 



^E| 

 <2> 



W=^ ^M 



Fig. 9 



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



