The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 141
e connections of the simplest form of C.B.instrument, from which it will be seen that when the receiveris on its rest the loop is connected to the ringer, but with acondenser interposed, so that the circuit is really incompleteso far as a direct current is concerned. Although the circuit Ii8… … Fig. 124 It is necessary that the latter be of a fairly high capacity,one of 2 to 25 microfarads being generally employed. t»an Skitter
Telephone
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