Reduction of impedance irregularities in submarine cable circuits by allocation
01 January 1934
In connection with the technical requirements of the Italy-Sardinia Cable [see Abstract 1933B02081] it is established that a high singing point is necessary over the working frequency range. The present paper deals with the theory of impedance variations and singing point, and Crisson's formulaelig for transmission lines are modified to be more accurately applicable to continuously loaded submarine cables. The general principles to be observed in allocating the lengths of a cable are explained, and the practical difficulties which arose in the course of manufacture of the aforementioned cable are discussed. Unexpected changes in impedance took place during core serving, armouring and laying, and the experimental investigations and conclusions are given.