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Naval Computer And Telecommunications Area Master Station Pacific (NCTAMSPAC) Det Puget Sound. Naval Radio Station (T) Jim Creek . BACKGROUND. ADM Carney, CNO, directed Site survey - 1946 Construction began – 1949 (RCA Contract) First Keyed – 1952, First Broadcast – 1953
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Naval Computer And Telecommunications Area Master Station Pacific (NCTAMSPAC) Det Puget Sound Naval Radio Station (T) Jim Creek
BACKGROUND ADM Carney, CNO, directed Site survey - 1946 Construction began – 1949 (RCA Contract) First Keyed – 1952, First Broadcast – 1953 Commissioned 18 November 1953 Reputation as the “most reliable VLF site” 99.99% on-the-air efficiency rate. 9 modifications to keep updated. (Value Project 2001) Goal of Value Project to extend life - 2030 DOD civilian technicians have maintained and operated the transmitter since 1972.
Station Composition • 4,899 total acres • 40 acres improved for Station use • 980 acres antenna ground field • 47 miles service roads and fire trails, only 4 miles are paved • 70 buildings/structures • 4 lakes • 4 Housing units • Fish Hatchery (Coho Salmon) cooperation with the Stillaguamish Tribe • Emergency Power Generator Station • VLF Transmitter • Antenna System
ANTENNA SYSTEM Components: • Two catenary arrays with five spans on each side. • Antenna located between Two 2700 foot mountains • Covers 1 sq mile with 10 miles of suspended cable • 35 - Towers total: • 12 - Main 200 ft. Towers • 13 - Buss towers • 10 pull off towers. • 10 miles of aerial cable spans. • Longest span – 8800 ft • Shortest span - 5400 ft • 3 spans replaced – 1988/89 • 2 spans replaced - 2001
ANTENNA SYSTEM Components: • Antenna spans designed to handle 1-2” of radial ice and winds up to 65KTs (approximately 75 mph) • 980 acre ground field • 587 cleared acres • Over 360 miles of copper cable conductors make up the ground grid.