Radio set AN/URC-78 (XE-2)/V. Quarterly report No. 4, 17 Mar--16 Jun 1972

The breadboard phase of the receiver/transmitter design has been largely completed except for some antenna coupler circuits and the secure retransmit circuit. Many of the thick-film hybrid circuits have been completed and tested and two R/T modules have been assembled and tested. The mechanical design of the R/T has been mostly completed and a simplified model of the R/T case has been tested for shock and leakage. Circuit design work is progressing in both the Vehicular Applique and the Vehicular Antenna Coupler. Mechanical design work has been started on these units. A limited amount of mechanical design work has been started on the Aircraft Applique. The Life Cycle Cost of Ownership Report was completed and delivered along with a detailed report on Value Engineering trade-off studies to date. The nuclear hardening portion of the Design Plan was delivered. (GRA)