Radio station WWVH in Hawaii, operated since 1948 by the National Institute of Standards and Technology (NIST) to broadcast time, frequency and other announcements, recently powered up innovative replacement antennas.
In a seven-year project to adopt a technology used on Navy ships, NIST has installed new antennas encased in fiberglass rather than traditional steel supports, to resist corrosion from the salty ocean air. The fiberglass design will reduce maintenance and repair costs. The new design also enables the flexible, lightweight antennas to be easily lowered to the ground for maintenance, reducing safety hazards to staff who previously had to climb the towers, which are up to 98 feet tall. The improved antennas should reduce signal downtime for WWVH users.
From its location on the island of Kauai, WWVH broadcasts on four different frequencies. Each frequency requires a different antenna; including backups, the station has a total of eight antennas, seven of which are made of fiberglass. NIST erected and powered up the last fiberglass replacement antenna in October 2007. NIST staff believe the project is the first demonstration of high-powered, high-frequency fiberglass antennas on land.
(Source: NIST/R Netherlands Media Network weblog)
More information on WWVH and NIST may be found at:
http://tf.nist.gov/timefreq/stations/wwvh.htm
In a seven-year project to adopt a technology used on Navy ships, NIST has installed new antennas encased in fiberglass rather than traditional steel supports, to resist corrosion from the salty ocean air. The fiberglass design will reduce maintenance and repair costs. The new design also enables the flexible, lightweight antennas to be easily lowered to the ground for maintenance, reducing safety hazards to staff who previously had to climb the towers, which are up to 98 feet tall. The improved antennas should reduce signal downtime for WWVH users.
From its location on the island of Kauai, WWVH broadcasts on four different frequencies. Each frequency requires a different antenna; including backups, the station has a total of eight antennas, seven of which are made of fiberglass. NIST erected and powered up the last fiberglass replacement antenna in October 2007. NIST staff believe the project is the first demonstration of high-powered, high-frequency fiberglass antennas on land.
(Source: NIST/R Netherlands Media Network weblog)
More information on WWVH and NIST may be found at:
http://tf.nist.gov/timefreq/stations/wwvh.htm