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F-3990 This VHF antenna is designed for applications that require peak performance in the 136-174 MHz while tolerating a VSWR around 2.0:1. This antenna has a loading coil between the radiating element and the base. This coil increases the electrical length and makes the antenna perform electrically as a 1/4 wave antenna, but shorter than a regular 1/4 wave antenna. Typical gain, when mounted on a ground plane, is comparable to a full 1/4 wave. Mounts on NMO. The upper element is made from a brass wound cable with a flexible shaft core, well sealed using rubber shrink material. This solution offers a high reliability and prevents breakage or brittleness. Other frequencies are available upon request. DOWNLOAD PDF -
- Frequency range of 138-174 MHz
- Unity gain achieved over its operating bandwidth
- Used for vehicles, such as ambulances, where vertical clearance is critical
- This antenna is ideal for a vehicle that enters areas with reduced headroom
- Combined with a matching circuit that is mounted inside the vehicle
- Each antenna assembly is individually calibrated on the roof of a vehicle
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- Gain of unity over its operating bandwidth
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert molded low-loss coil form and spring-loaded, gold-plated contact
- Rubber boot to ensure a moisture-proof installation
- Standard TAD / NMO type mount
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Broadband 1/2-wave antenna - no ground plane needed
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert, molded low-loss coil form and spring-loaded gold-plated contact
- Rubber boot ensures a moisture-proof installation/avoid scratching or rusting of the vehicle
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Broadband 1/2-wave antenna - no ground plane needed
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert, molded low-loss coil form and spring-loaded gold-plated contact
- Rubber boot to ensure a moisture-proof installation/avoid scratching or rusting of the vehicle
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- 2.0 dBd of gain over its operating bandwidth
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert molded low-loss coil form and spring-loaded, gold-plated contact
- Rubber boot and overlap construction to ensure a moisture-proof installation
- Standard TAD / NMO type mount
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No ground plane antenna
- 2.0 dBd of gain over its operating bandwidth
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert molded low-loss coil form and spring-loaded, gold-plated contact
- Rubber boot ensures a moisture-proof installation
- Standard Motorola C, M type mount
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- 3.0 dBd gain achieved by featuring a 5/8-wave whip with a base loaded matching coil
- Manufactured using the best corrosion-resistant materials and finishes available
- Triple-plated chrome brass with a large insert molded low-loss coil form and spring-loaded, gold-plated contact
- O-ring seals and overlap construction to ensure a moisture-proof installation
- Standard Motorola NMO type mount
