{"product_id":"rfi-sw12-vhf-5-8-wave-roof-mount-antenna-3db-148-175mhz-1340mm","title":"RFI SW12 VHF 5\/8 Wave Roof Mount Antenna, 3dB, 148-175MHz, 1340mm","description":"\u003ch2\u003eRFI SW12 VHF ⅝ Wave Roof Mount Antenna, 3dB, 148-175MHz\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eA base-loaded ⅝ wave VHF whip, with 3dB of gain over a standard quarter wave.\u003c\/strong\u003e Whip only; fits the RFI MB9 roof base.\u003c\/p\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eWorking flat farmland, open roads or long direct calls between vehicles? A ⅝ wave flattens the signal towards the horizon, pushing it further across open country than a standard quarter wave whip.\u003c\/p\u003e\n\u003cp\u003eIt needs the centre of a metal roof to work at its best, and it's tall at 1340mm, so it suits vehicles without height limits. In steep hills and forestry, a unity gain whip such as the RFI SW2 is often the better choice.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3dB over a quarter wave (⅝ wave design)\u003c\/strong\u003e means more reach on flat, open ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e148-175MHz VHF high band\u003c\/strong\u003e means it suits business, farm and emergency service VHF radios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapered 17-7PH stainless whip on a fibreglass base-loading coil\u003c\/strong\u003e means a strong, flexible whip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated to 100W\u003c\/strong\u003e means plenty of headroom for VHF mobile radios.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstall Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount on the \u003cstrong\u003ecentre of a metal roof\u003c\/strong\u003e. It needs a ground plane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField tuned\u003c\/strong\u003e to minimum VSWR on install. Our technicians can tune it for you.\u003c\/li\u003e\n\u003cli\u003eAt \u003cstrong\u003e1340mm\u003c\/strong\u003e, check clearance for carports, sheds and low branches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComplete Your Antenna\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/rfi-mb9-vhf-antenna-base-19mm-hole\"\u003eRFI MB9 VHF Antenna Base\u003c\/a\u003e: base only, or with 5m RG58 cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e148-175MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eGain\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e3dB over a quarter wave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eBase-loaded ⅝ wave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWhip length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e1340mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eGround plane\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eRequired: centre of a metal roof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eRFI MB9, MB10 or MB12 base (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eMax power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e100W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eTuning\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eField tuned to minimum VSWR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShould I choose the SW12 or a unity gain whip?\u003c\/strong\u003e\u003cbr\u003eChoose the SW12 for flat, open country and long direct calls. In hills, valleys and forestry, or when talking through a repeater above you, a unity gain whip's wider pattern usually works better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a licence?\u003c\/strong\u003e\u003cbr\u003eVHF business radio operates under a licence. This antenna suits licensed VHF radios.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you install it for me?\u003c\/strong\u003e\u003cbr\u003eYes. Our Bay of Plenty technicians can fit and tune it. Outside the region, we work with partner installers.\u003c\/p\u003e","brand":"RFI","offers":[{"title":"Default Title","offer_id":45315778183219,"sku":"SW12","price":232.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0026\/7357\/3939\/files\/SW12_1.webp?v=1794278660","url":"https:\/\/mobilesystems.nz\/products\/rfi-sw12-vhf-5-8-wave-roof-mount-antenna-3db-148-175mhz-1340mm","provider":"Mobile Systems Limited","version":"1.0","type":"link"}