{"product_id":"icom-ad-98fsc-connector","title":"ICOM AD-98FSC connector","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eNeed more and\/or clearer range with your ONWA KV-28 or KV-38 VHF radio?\u003cbr\u003e\u003cbr\u003eWith this connector, you can connect your KV-28 or KV-38 VHF radio to an external antenna equipped with a male BNC connector.\u003c\/p\u003e\n\u003cp\u003eDoes the external antenna have a PL-259 connection? Then order the variant including the \"SO239 to male BNC connector\".\u003c\/p\u003e\n\u003cp\u003eAssuming transmission at 6W and using an RG-58 antenna cable, your clearly audible range will increase from roughly 4-6 to 6-9 nautical miles. Reception of, for example, the weather report will also improve significantly. This can be influenced by, among other things, the weather situation.\u003c\/p\u003e\n\u003cp\u003eHow far your practical range is for your VHF radio is determined by a number of factors. Antenna height and power (loss) play important roles that you yourself can control. Antenna height is the most important, because VHF signals travel via the line-of-sight principle. Popularly speaking: \"it stops after the horizon\". The transmitting power also plays a role, of course: how intelligible are you still at the radio horizon. Power loss is caused by, among other things, the length and type of cable, the connectors used, and any splitter. The popular RG-58 cable has a relatively high loss; an Aircell 7 or H155 has a much lower loss and therefore delivers a signal with less power loss to the antenna. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAnyone who sails a lot on large waters would do well to pass a Marcom B exam so that a fixed VHF radio with maritime mode (25 watts) can be used.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5\u003eExample Calculation\u003c\/h5\u003e\n\u003cp\u003eWith a handheld VHF radio (transmission height approximately 2 meters), you yourself have a radio horizon of 3.1 nautical miles. To calculate your total radio horizon, you must add the radio horizon of the other party (sailing yacht mast height 8 meters: approximately 6 nautical miles; traffic control mast height 40 meters: approximately 14 nautical miles).\u003c\/p\u003e\n\u003cp\u003eAssume your own antenna is at 2 meters and the other ship's antenna is at 8 meters:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAt 1W: You are perfectly audible to ships up to, say, 3-5 nautical miles.\u003c\/li\u003e\n\u003cli\u003eAt 6W: You are perfectly audible to ships up to, say, 4-6 nautical miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you connect the KV-28 or KV-38 via the connector to an 8-meter antenna (10 meters of RG-58 cable), your radio horizon will be about 6 nautical miles (instead of 3). However, your transmission power will decrease considerably due to the power loss in the connectors and the antenna cable. That loss amounts to about 46%,\u003cbr\u003e\u003cbr\u003eAlthough the radio horizon indicates the hard limit, the power determines how \"strong\" and clear you come in within that limit (assume the receiver also has an 8-meter mast):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAt 0.54W (1W setting): You are perfectly audible to ships up to, say, 4-7 nautical miles.\u003c\/li\u003e\n\u003cli\u003eAt 3.2W (6W setting): You are perfectly audible to ships up to, say, 6-9 nautical miles. \u003cbr\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwo antennas at 8 meters have a combined radio horizon of 12.6 nautical miles.\u0026nbsp;\u003c\/p\u003e","brand":"Sail Trade","offers":[{"title":"ICOM AD-98FSC connector","offer_id":53713734861133,"sku":null,"price":15.9,"currency_code":"EUR","in_stock":true},{"title":"ICOM AD-98FSC connector + SO239 to male BNC connector","offer_id":53713734893901,"sku":null,"price":21.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0937\/0019\/4637\/files\/ICOMBNCconnector.png?v=1773311229","url":"https:\/\/sailtrade.nl\/en\/products\/icom-ad-98fsc-connector","provider":"Sail Trade - Authorised ONWA dealer for EU","version":"1.0","type":"link"}