Some factors in the engineering design of v.h.f. multichannel telephone equipment

The principal clauses of a specification for a v.h.f. multichannel telephone equipment are discussed, and methods of approach to these problems are suggested. Particular attention is given to ancillary equipment such as automatic change-over systems, remote control, and fault warning and location facilities. The general method of construction is described together with a brief description of power supply problems and suitable aerial arrangements.