An unattended broad-band microwave repeater for the td-2 Radio relay system
R. W. Friis, K. D. Smith · Electrical Engineering · 1951
To meet the stringent requirements of the 4,000-mile transcontinental microwave relay system, a number of new developments had to be included in the design of the repeater stations. The circuits of these unattended stations, and how they are maintained, are the subject of this article.