The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 328
in ChapterXVI., Fig. 239. Itis covered with a circular iron casing, and two repeaters aremounted on a base-board 4 inches by lOf, so that theyoccupy exactly the same rack space as two No. 11 repeaters.The resistance of each coil is only 22J ohms in this type.The connections are similar to those of… … Fig. 304 30o PRACTICAL TELEPHONE HANDBOOK These condensers are each contained in tinned iron cases,which are 7| inches long, k\\th inches wide and y-g-ths of aninch thick. The terminal tabs are fitted on a strip of ebonitescrewed to an end lid. The condensers should withstand avoltage of 200 and…
Telephone
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