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661 Series
174-230MHz TV Quadrant Antenna

Rev : 01 | Rev date : 28 Jan 2021

PRODUCT DESCRIPTION

Quadrant antennas provide a cost-effective top or side mount TV antenna for omnidirectional coverage in Band III. Quadrant antennas are ideal for low and medium power single channel Band III TV applications. Coverage is basically omnidirectional and may be altered somewhat by adjustment of the positions of the radiators on the RFS antenna test range. Each bay comprises two radiating elements to give approximately 3.5dBd gain. Up to six bays are available to meet higher gain needs. The antenna system may be operated with pressurized or unpressurized feeders.

FEATURES / BENEFITS

  • Designed for high corrosion resistance and long life in harsh environments
  • Includes top-mounted hot-dip galvanized support pole
  • All solid outer, jacketed cables for high reliability
  • Stainless steel radiators
  • Omnidirectional coverage
  • Horizontal polarization
  • Available in low power (unpressurized) and medium power (pressurized) versions

661 Series showing 661-4 Antenna

TECHNICAL FEATURES

Details 
Product Type   Band III (High VHF) 661 TV Antenna

Electrical Specifications 
Antenna Type   Turnstile Antenna
Operating Frequency Range MHz 174-230
Polarization   Horizontal
Azimuth Radiation Pattern   Omnioid
Impedance Ohms  50 

Mechanical Specifications 
Pressurization Operational kPa (psi) 10 to 25 (1.4-3.6)
Pressurization Test kPa (psi) 100 (15)

Model Number Specifications 
Antenna Model   661-1 661-2 661-4 661-6
Number of Bays   1 2 4 6
Nominal Gain (Mid-band) dBd 3.5 6.5 9.5 11
Return Loss dB 26 Vision, 23 across channel
Power Rating kW 0.25/ bay unpressurized
2.5/ bay pressurized
Number of Channels   Single
Input Connector   7/8" EIA Flange
Base Diameter mm (in) 336 (13.2)
Mounting (Standard) mm (in) 8 x 20mm (8 x 3/4") bolts on 297mm (11.75") PCD
Mounting Type   Side or Top
Effective Area Front (Full Antenna) No Ice

m2 (ft2)

 0.871 (9.40) 1.530 (16.50) 2.848 (30.60) 4.166 (44.80)
Effective Area Side (Full Antenna) No Ice m2 (ft2) 0.823 (8.90) 1.447 (15.60) 2.693 (29.00) 3.939 (42.40)
Base Moment kN-m (lb-ft) 1.786 (1317) 5.510 (4064) 19.09 (14080) 40.84 (30122)
Base Shear kN (lb) 1.854 (417) 3.256 (732) 6.06 (1362) 8.864 (1993)
Design Wind Speed (max) kmh (mph) 240 (150)
Weight kg (lb) 90 (198) 190 (419) 275 (606.27) 675 (1488)

External Document Links

Notes