{"product_id":"kmr400-uhf-coax-cable-50ft-pl-259-low-loss-coax-for-ham-cb","title":"KMR400 UHF Coax Cable 50ft PL-259 - Low Loss Coax for HAM \u0026 CB","description":"\u003cp\u003eIn this review the 50ft KMR400 UHF coax jumper with PL-259 UHF male connectors is evaluated for HAM, CB and marine use; the bottom line is simple: it is a purpose-built, low-loss coax that targets operators who need reliable outdoor runs and minimal signal attenuation. Tested on network analyzers during production to assure a VSWR under 1.35 and built with a 100% shield braid, the cable delivers the kind of consistent performance that matters for antenna analyzers, SWR meters and AIS or marine radio installations.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow loss construction:\u003c\/strong\u003e The KMR400 design and high-density tinned copper braid keep signal loss very low, measured at around 0.26db for a 3ft segment at 500MHz, which preserves RF performance over longer runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional manufacture:\u003c\/strong\u003e Swept with network analyzers during production to maintain VSWR below 1.35, ensuring predictable match quality for sensitive radio and analyzer work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust connector attachment:\u003c\/strong\u003e Uses a heavy PL-259 mount clamp connector rather than a crimp type, reducing the chance of separation under strain or outdoor exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable materials:\u003c\/strong\u003e Copper clad aluminum conductor plus a UV-proof RF-PVC jacket are specified for long outdoor life, aimed at up to 20 years of exposure in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof sealing:\u003c\/strong\u003e Comes with nickel-plated UHF connectors and an adhesive-lined heat shrink tube up to 2.2 in long to create sealed end connections for marine and exterior use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis cable suits HAM and CB operators who need a low-loss, weatherproof jumper for fixed antenna installations, marine radio, AIS or when running to an SWR meter or antenna analyzer. Users who prioritize a secure PL-259 attachment and predictable VSWR during tuning will appreciate the factory swept assurance.\u003c\/p\u003e\n\u003cp\u003eIt is less ideal for installers who need the absolute maximum flexibility in tight routing, as customers report mixed impressions of stiffness; those requiring tiny bend radii or the lightest, most flexible RG-style cable might look elsewhere.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow insertion loss and full braid shielding preserve signal for HF\/VHF\/UHF work.\u003c\/li\u003e\n\u003cli\u003eSturdy PL-259 mount clamp connectors and adhesive-lined heat shrink provide durable, sealed terminations for outdoor use.\u003c\/li\u003e\n\u003cli\u003eManufactured with production sweeps to keep VSWR under control for accurate analyzer and SWR meter readings.\u003c\/li\u003e\n\u003cli\u003eUV-proof jacket and nickel-plated connectors increase longevity in marine environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users find the cable stiffer than expected, so routing in very tight spaces can be more difficult than with thinner coax.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e50 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector type\u003c\/td\u003e\n\u003ctd\u003ePL-259 UHF male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e50 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShield\u003c\/td\u003e\n\u003ctd\u003eHigh-density tinned copper, 100% shield\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003eCopper clad aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJacket\u003c\/td\u003e\n\u003ctd\u003eUV-proof RF-PVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVSWR (production)\u003c\/td\u003e\n\u003ctd\u003eLess than 1.35 (swept)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 50ft KMR400 PL-259 UHF coax is a strong choice for HAM, CB and marine installations where low loss and a secure, weatherproof connection matter. It balances durability and RF performance at a good value, especially for fixed runs and analyzer work; choose a more flexible cable only if tight routing is the primary concern.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable suitable for marine use?\u003c\/strong\u003e\u003cbr\u003eYes, the UV-proof jacket, nickel-plated connectors and adhesive-lined heat shrink are intended to provide sealed end connections and long outdoor life for marine installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much loss does the cable introduce?\u003c\/strong\u003e\u003cbr\u003eProduction data cites very low loss; a 3 ft sample shows about 0.26db at 500 MHz and customers report similarly low loss at VHF\/UHF frequencies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the connectors reliably attached?\u003c\/strong\u003e\u003cbr\u003eYes, the product uses a heavy PL-259 mount clamp connector rather than a crimp type, reducing the chance of the connector coming off under use.\u003c\/p\u003e","brand":"XRDS -RF","offers":[{"title":"Default Title","offer_id":48673930445019,"sku":"B09R1CWWQ6","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71NfATZyCgL._SL1500.jpg?v=1778631236","url":"https:\/\/gearmusthave.com\/products\/kmr400-uhf-coax-cable-50ft-pl-259-low-loss-coax-for-ham-cb","provider":"GearMustHave","version":"1.0","type":"link"}