{"product_id":"sirio-sb-3-u","title":"Sirio SB 3 U Marine VHF Base Antenna 100W, 0dBd Gain, No Tuning, DC-Ground, 156-163MHz","description":"\u003cp\u003eThe \u003cstrong\u003eSirio SB 3 U\u003c\/strong\u003e is a high-quality, 3\/4λ J-pole VHF marine band base antenna engineered in Italy for professional and leisure marine communications. Covering 156–163 MHz with \u003cstrong\u003eno tuning required\u003c\/strong\u003e, it delivers 100W CW power handling and a gain of 0 dBd (2.15 dBi) with a clean omnidirectional radiation pattern. A key feature is its \u003cstrong\u003eDC-ground protection\u003c\/strong\u003e, providing inherent lightning protection — essential for exposed marine installations. Connecting via SO-239 (UHF-Female), it supports on-mast or on-wall mounting and stands at 1465mm (4.81ft). Constructed from chromed brass, fibreglass, and nylon for corrosion-resistant marine durability.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100W CW power handling\u003c\/li\u003e\n\u003cli\u003eVHF Marine Band coverage: 156–163 MHz — no tuning required\u003c\/li\u003e\n\u003cli\u003eGain: 0 dBd \/ 2.15 dBi\u003c\/li\u003e\n\u003cli\u003eDC-ground lightning protection — essential for marine use\u003c\/li\u003e\n\u003cli\u003eOmnidirectional radiation pattern\u003c\/li\u003e\n\u003cli\u003eLinear vertical polarisation\u003c\/li\u003e\n\u003cli\u003e3\/4λ J-pole design\u003c\/li\u003e\n\u003cli\u003eOn-mast or on-wall mounting\u003c\/li\u003e\n\u003cli\u003eSO-239 (UHF-Female) connector\u003c\/li\u003e\n\u003cli\u003eHeight: 1465mm \/ 4.81ft\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant materials: chromed brass, fibreglass \u0026amp; nylon\u003c\/li\u003e\n\u003cli\u003eMade in Italy by Sirio\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eType: 3\/4λ J-pole VHF marine base antenna\u003c\/li\u003e\n\u003cli\u003eRadiation: Omnidirectional\u003c\/li\u003e\n\u003cli\u003ePolarisation: Linear vertical\u003c\/li\u003e\n\u003cli\u003eFrequency range: 156–163 MHz (no tuning required)\u003c\/li\u003e\n\u003cli\u003eSystems: VHF Marine Band\u003c\/li\u003e\n\u003cli\u003eGain: 0 dBd \/ 2.15 dBi\u003c\/li\u003e\n\u003cli\u003eMax power: 100W CW\u003c\/li\u003e\n\u003cli\u003eGrounding: DC-ground\u003c\/li\u003e\n\u003cli\u003eConnector: SO-239 (UHF-Female)\u003c\/li\u003e\n\u003cli\u003eHeight: 1465mm \/ 4.81ft\u003c\/li\u003e\n\u003cli\u003eMounting: On-mast \/ on-wall\u003c\/li\u003e\n\u003cli\u003eMaterials: Chromed brass, fibreglass, nylon\u003c\/li\u003e\n\u003cli\u003eCountry of origin: Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIRIO","offers":[{"title":"Default Title","offer_id":57324110578008,"sku":"MOON-11-933","price":39.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/8753\/5192\/files\/dff23a7ba248588dec7167f3c3c006bf_c0ee86cc-0d99-4080-a3b9-917e444bb538.jpg?v=1779199064","url":"https:\/\/kamsat.co.uk\/products\/sirio-sb-3-u","provider":"Kamsat","version":"1.0","type":"link"}