NEW OVERHEAD TELECOM WIRES.

Because of technological difficulties, the production of cadmium-based bronze-alloy wires had to be suspended in Hungary. In order to solve supply problems to the Hungarian Post the manufacturer offered a magnesium-based wire but continuous supply was not possible because of a shortage of raw material. Silver bronze alloys proved able to resolve the problems mentioned. On the basis of examinations and tests with the two new wire types, conditions for their introduction into the telecom network have been defined. This article summarizes the tests and computations concerning mechanical and transmission parameters carried out on the cadmium bronze and later with the silver bronze wires at the Research Institute of the Post Office.