{"product_id":"sirio-gain-master-1-2","title":"Sirio Gain Master 1\/2 Wave Base 10m Ham Antenna 500W Continuous, No Tuning, 27.2-30MHz","description":"\u003cp\u003eThe \u003cstrong\u003eSirio Gain Master 1\/2\u003c\/strong\u003e is a high-performance, centre-fed 1\/2 wave base station antenna engineered in Italy for 10-metre amateur radio use. Covering 27.2–30 MHz with \u003cstrong\u003eno tuning required\u003c\/strong\u003e, it delivers 0 dBd (2.15 dBi) gain and handles up to 500W continuous (CW) — a serious antenna for serious 10m HAM operators. Updated in 2024 with a new plastic reinforcement sleeve for added durability. Standing at 5560mm (18.24ft) tall and designed for on-mast mounting, it's built from anodised aluminium, copper, stainless steel, fibreglass, and UV-stabilised thermoplastic to withstand years of outdoor use.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e500W continuous power handling (CW)\u003c\/li\u003e\n\u003cli\u003e27.2–30 MHz coverage — no tuning required\u003c\/li\u003e\n\u003cli\u003eGain: 0 dBd \/ 2.15 dBi\u003c\/li\u003e\n\u003cli\u003eBandwidth: ≥1.8 MHz @ SWR ≤2\u003c\/li\u003e\n\u003cli\u003eDesigned for 10m amateur (HAM) radio\u003c\/li\u003e\n\u003cli\u003eOmnidirectional radiation pattern\u003c\/li\u003e\n\u003cli\u003eLinear vertical polarisation\u003c\/li\u003e\n\u003cli\u003e1\/2λ centre feed design\u003c\/li\u003e\n\u003cli\u003eOn-mast mounting\u003c\/li\u003e\n\u003cli\u003eSO-239 (UHF-Female) connector\u003c\/li\u003e\n\u003cli\u003eHeight: 5560mm \/ 18.24ft\u003c\/li\u003e\n\u003cli\u003e2024 update: new plastic reinforcement sleeve\u003c\/li\u003e\n\u003cli\u003ePremium materials: anodised aluminium, copper, stainless steel, fibreglass \u0026amp; UV-stabilised thermoplastic\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: 1\/2λ centre feed base antenna\u003c\/li\u003e\n\u003cli\u003eRadiation: Omnidirectional\u003c\/li\u003e\n\u003cli\u003ePolarisation: Linear vertical\u003c\/li\u003e\n\u003cli\u003eFrequency range: 27.2–30 MHz (no tuning required)\u003c\/li\u003e\n\u003cli\u003eSystems: 10m amateur (HAM)\u003c\/li\u003e\n\u003cli\u003eGain: 0 dBd \/ 2.15 dBi\u003c\/li\u003e\n\u003cli\u003eBandwidth: ≥1.8 MHz @ SWR ≤2\u003c\/li\u003e\n\u003cli\u003eMax power: 500W continuous (CW)\u003c\/li\u003e\n\u003cli\u003eConnector: SO-239 (UHF-Female)\u003c\/li\u003e\n\u003cli\u003eHeight: 5560mm \/ 18.24ft\u003c\/li\u003e\n\u003cli\u003eMounting: On-mast\u003c\/li\u003e\n\u003cli\u003eMaterials: Anodised aluminium, copper, stainless steel, fibreglass, UV-stabilised thermoplastic\u003c\/li\u003e\n\u003cli\u003eCountry of origin: Italy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SIRIO","offers":[{"title":"Default Title","offer_id":48222112579928,"sku":"SIRIO-GAIN-MASTER-1\/2","price":139.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/8753\/5192\/files\/hw1.jpg?v=1714744073","url":"https:\/\/kamsat.co.uk\/products\/sirio-gain-master-1-2","provider":"Kamsat","version":"1.0","type":"link"}