The TL radio relay system is a telephone message broadband microwave facility that operates in the 10.7‐ to 11.7‐gc common carrier frequency band. It has been specifically designed for high reliability, low maintenance and small power consumption by the exclusive use of solid‐state circuitry except for the transmitter and local oscillator klystron tubes. Transmission performance and over‐all system description are presented, as well as a description of some early field applications.

This paper points out the salient equipment and building considerations peculiar to the TH‐3 radio system with emphasis on the ability to combine TH‐3 with existing radio systems.

This paper points out salient equipment and building considerations peculiar to the TD‐3 radio system and in particular emphasizes the important differences in station design that exist for TD‐3 compared with TD‐2 radio.