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Part Number -- VAS-108 (AS-5243/U) |
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| Name: | Broadband Whip Antenna |
| Category: | VHF Antennas |
| Diagram(s): | Diagrams and Mounting Details |
| Photo(s): | VAS-108 |
| NATO Stock Number (NSN): | 5985-21-920-0006 |
| Frequency Range: | 30 MHz to 108 MHz - for antennas (repeated below) |
| Features: | * Broadband * Extremely Rugged and Reliable * Base Mount for Replacement Flexibility * High Voltage Isolation for Safety * East Assembly/Disassembly |
| Description: |
Valcom's
model VAS-108 is a general purpose VHF Broadband communications
antenna system. Its rugged construction and spring mounting of the
whip antenna make it ideal for vehicular applications. The
antenna system provides omni-directional, vertically polarized
coverage over the 30 to 108 MHz frequency range. It is
conservatively rated for 100 watts of RF input power and exhibits a
VSWR of 3.5:1 or less over the entire operating band with reference
to a 50 OHM line impedance. The input RF connection is made through
a single coaxial BNC type connector centrally located on the bottom
of the mounting base. The mounting base houses the matching unit and
EMP protect. Fibreglass
upper and lower antenna whip elements and a polycarbonate mounting
base with a spring antenna support comprise the antenna system's
three piece construction. It is approximately 113 inches (2.85 M) in
length with antenna elements less then one inch (2.5 cm) in diameter
and weighs approximately 9.6 pounds (4.8 kg). |
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Electrical Characteristics |
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| Frequency Range: | 30 MHz to 108 MHz |
| Azimuth
Coverage [Radiation Pattern]: |
Omni-directional +/- 1 dB |
| Gain: | -2 dBi average (see graph) |
| VSWR: | 3.5:1
maximum 2.5:1 average |
| Polarization: | Vertical |
| Power Handling: | 100 watt average (140 W peak) |
| High Voltage Protection: | 13.5 kV upon contact with high power line or high voltage source |
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Mechanical Characteristics |
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| Weight: | 9.5 lbs. (4.8 kg) |
| Height: | 113 in (2.85 M) |
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Environmental Characteristics |
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| Temperature: | -40°F to 131°F (-40°C to +55°C) |
| Humidity: | Relative Humidity 95% |
| Altitude: | -1000
ft to 16000 ft (-300 m to 5000 m) above sea level |
| Vibration: | 5-500 Hz |
| Wind Velocity: | 50 Mps (80 Kph) operating |
| Ice Loading: | 1/2 inch (13 mm) radial |
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| ©2006 All information and materials contained within are the property of Valcom Manufacturing Group Inc.. | |
