FireStik® FS4-B - FS-II 4' Black Heavy Duty 5/8 Wave Antenna

If you have ever tuned a non-tunable tip antenna, you will have a real appreciation for the "FS" antennas. To tune a "FS" antenna, you just pop-of the tip and turn the adjustment screw up or down as needed.
All "FS" antennas exceed the requirements of any CB radio, new or old. Aside from the hi-performance loading coil that maximizes the transmit/receive functions of your CB, these top-loaded antennas will also receive the NOAA emergency weather alert and national weather broadcasts for radios with those features. The "FS" antennas are 100% American made with 100% American materials. To maintain a balance between flexibility and ruggedness, use a custom blended, glass fiber reinforced shaft. Each is wound with heavy insulated copper wire to prevent the oxidation and shorted windings often found on non-Firestik antennas. The tunable tip mechanism is made from rust-proof brass and has a rubber o-ring to hold the adjuster in place after tuning. 3/8"-24 threaded base has a tapered contact point that works especially well with Firestik mounts and accessories. The tapered "lug-nut" effect transfers stress away from the threads and reduces the possibility of vibration induced loosening of the antenna in its mount. Each antenna is covered with a static reducing, water-tight sleeve containing UV and pigment stabilizers. For peek performance recommend that you use one of 18-foot Fire-Flex coaxial cables with these antennas. All "FS" series antennas are factory bench tested for resonant frequency and overall quality.
These are ground-plane dependent antennas. They require a metallic counterpoise to perform properly. They are not suited for use on non-metallic (composite) vehicles or those with insufficient metal. They can be used with a transmitter (versus a receiver) these antennas should be tested and tuned across the radios operating frequency. Using an untested, untuned antenna for transmitting can damage the transmitter circuitry. Ground-plane dependent antennas require mounting brackets and antenna stud mounts that are grounded to a chassis ground point. Powder coating, paint and/or anodized surfaces are insulated coatings and must be removed down to the metal surface where ever a grounding point is required.