Towers

CPARC Antenna Towers

The club operates and maintains three antenna towers by the shack on campus: the flagship 72-ft HF antenna tower in the courtyard, a 35-ft satellite antenna tower by the shack front door, and the 10 foot VHF-UHF tower on the building 20 roof.

HF Antenna Tower (Est. 2012)

Tower: US Tower Corp TX-472MDPL 72-foot 4-section motorized telescoping tower

Rotator: Yaesu G-2800DXA

Antennas:

  • Hy-Gain TH-7DX - 7 element, triband HF antenna for 10, 15, and 20 meter
  • Cushcraft XM-240 - 2 element, 40 meter dipole antenna
  • Double Bazooka - 80 meter inverted-V antenna





  • Satellite Antenna Tower (Est. 1976, remodeled in 2013)

    Tower: Tri-Ex W-80 Prototype antenna tower

    Rotator: Yaesu G-5500

    Antennas:

  • VHF Cross-Polarized Satellite Antenna
  • UHF Cross-Polarized Satellite Antenna
  • 23-element 1280MHz Yagi
  • 2.4GHz Dish Antenna with Picostation (pointed 15 degrees below the other antennas)
  • Diamond X-50 VHF/UHF High-Gain Base-Station Antenna

  • The original W-80 tower was donated by A. J. F. Clements (W6KPC (SK), then owner of Tri-Ex Tower Corp) in 1976. This tower is a 5-section, 80-foot telescoping tower, with a motorized winch system that was rebuilt in 2009. This tower served the club for many years with a Hy-Gain TH-6DX triband antenna, a 40m dipole antenna, and a 80m inverted-V antenna.


    In 2013, the old HF antennas were removed from the W-80 tower and replaced with a complete satellite-tracking antenna system. This system included VHF and UHF cross-polarized antennas for satellite work along with a 1280MHz yagi and a 2.4GHz dish antenna. Additionally, the tower was secured to fixed height of ~35 feet to the top plate to provide a secure platform for the new satellite antenna system. This antenna system sports a Yaesu G-5500 rotator that has both azimuth and elevation controls allowing the directional antennas to be pointed at any point in the sky. This is typically used for tracking satellites or for point-to-point communications using the higher gain antennas on this tower. Due to this unique rotator configuration, this system is often referred to as the "az-el array" for "Azimuth and Elevation Controlled Antenna Array".




    Rooftop Antenna Tower (est. long time ago, remodeled in 2011)

    Tower: Rohn 25G (single section mounted to a base plate)

    Antennas:

  • Diamond X-50 VHF/UHF High-Gain Basestation Antenna
  • Diamond X-50 VHF/UHF High-Gain Basestation Antenna
  • Diamond D130J Wide-band Discone 25-1300MHz
  • 6-meter Halo-Match Vertical HF Antenna (roof mounted)