The 1142 is a narrow band unity gain antenna built to a specific spot frequency requirement to effectively reduce interference from other near frequency transmitters. Of rugged, two-piece construction, the antenna's lower section is enclosed in heavy-wall fiberglass tubing. The upper whip is fiberglass and attaches in the field with a protected 1/2" x 20 threaded connector. This unit provides the advantages of DC ground lightning protection, versatility, installation ease and requires no ground plane elements to decouple from the support structure