1076 THE BELL SYSTEM TECHNICAL JOURNAL, SEPTEMBER 19o4 



19 



GAIN ADJUSTING NETWORK 



ELEMENTS SHOWN FOR 



TYPICAL ARRANGEMENT 



OF REPEATER BETWEEN 



TWO H88 TRUNKS 



25 R13 14 R12 



32(^M8 — Wv — 8»— \AAr- 

 390on 2000 n 



io«- 

 13I 



CI4 

 0.004/U.F 



0.008/^F 



C12 

 0.001/^F 



C1I 

 0.0005/iF 



7<| OJW^ 



285n 



R 9 



2000 n 



LI 

 285n 



FUSE ON POWER 

 DISTRIBUTION PANEL 



■^gi-<r\_0+ 130 

 10 PLT 



' VW 



Ay\A 



AMPLIFIER UNIT 



FILAMENT ADJUSTING RESISTOR 



AND FUSE ON 



POWER DISTRIBUTION PANEL 



TUBE ON FRONT 

 OF UNIT 



PIN JACKS 



FOR MONITORING 



AND TUBE CHECKS 



PIN JACKS ON 

 FRONT OF UNIT 



250n 250il 



BO 1 (g B02® B03 ® ^-jvjji <^-.wjt 



BUILDING j^ j^ ""^j^ KsmA^smJ 



CAPACITORS 



T ^ ^ 



r^Wy\ 



r^wy^ 



INPUT 

 TRANSFORMER 



TO TRUNK 

 OR LINE 



TO E3 

 REPEATER 



-O- 



IN ^^A" 



"B"out - 



TO TRI 

 OR Lll 



OS) TERMINALS ON NETWOF 

 STRAPPING BOARD 



O TERMINALS ON PLUG PI 

 AT REAR OF UNIT 



Fig. 16 — Circuit of E2 repeater. 



