F-3990 VHF Peak Performance Antenna
F-3990-A and F-3990-B
F-3990
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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.
Description
Additional information
| Frequency Range, MHz | Available for 136-174 |
|---|---|
| Nominal Gain | 0 |
| VSWR | 2.0:1 |
| Power Rating, Watts | 75 |
| Nominal Impedance, Ohms | 50 |
| Base | ABS\, Ultrasonic brass insert Adapter available for a hand set |
| Mounting | Mounts on NMO Ground Plane for unity gain No Ground Plane- in this case the gain will depend on the environment |
| Length, in | 13” brass wound cable with flexible shaft for F-3990-A 9.75” brass wound cable with flexible shaft for F-3990-B |
| Frequency Range | 136-174 MHz |
| Nominal Gain | 0 dBd |
Ordering Information
