{"product_id":"400-470mhz-uhf-duplexer-50w-radio-repeater-duplexer-tunable","title":"400-470MHz UHF Duplexer 50W Radio Repeater Duplexer - Tunable","description":"\u003cp\u003eIn this review of the 400-470MHz UHF Duplexer the bottom line is straightforward: this is a compact, factory preset duplexer built for low-power repeater systems that need reliable channel separation. The reviewer found it most useful for installers and radio hobbyists who run 50W VHF\/UHF repeaters and need a pre-set pair (462 MHz send, 472 MHz receive) with the option to retune across the 400-470MHz band. It is practical, well specified for its class, and uses durable N female connectors for easy integration.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory preset frequencies:\u003c\/strong\u003e Ships preset to 462 MHz (low) and 472 MHz (high), saving setup time for common repeater pairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTunable across 400-470MHz:\u003c\/strong\u003e Allows adjustment within the UHF band so users can retune the duplexer to match site-specific channel spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eN female connectors:\u003c\/strong\u003e Standard N female connectors make it straightforward to attach coax feedlines and existing repeater hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50W power handling:\u003c\/strong\u003e Rated for up to 50W input power, suitable for lower-power repeater installations and test setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGood isolation and low loss:\u003c\/strong\u003e With around 75dB isolation and about 1.2dB insertion loss, it preserves signal quality between transmit and receive paths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact repeater use:\u003c\/strong\u003e Designed to handle typical repeater frequency spacing and reduce interference in small system deployments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis duplexer is aimed at radio technicians, small-club repeater operators, and amateur radio enthusiasts who operate low-power repeaters or need a compact passband solution for a 400-470MHz system. Its preset to 462\/472 MHz makes it convenient for setups that match those frequencies and speeds initial deployment.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for high-power commercial repeaters or fixed infrastructure that requires higher than 50W handling or custom connector types; users with those needs should look for industrial-grade duplexers with higher power ratings and broader environmental specifications.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFactory preset pair (462\/472 MHz) reduces initial setup time for matching repeater channels.\u003c\/li\u003e\n\u003cli\u003eTunable across the 400-470MHz range so it can be adapted to nearby channel plans.\u003c\/li\u003e\n\u003cli\u003eStrong isolation (~75dB) and modest insertion loss (~1.2dB) keep transmit\/receive paths well separated.\u003c\/li\u003e\n\u003cli\u003eN female connectors are durable and widely compatible with common coax assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum input power of 50W limits this unit to lower-power systems and hobby use.\u003c\/li\u003e\n\u003cli\u003eSpecification sheet is basic and lacks environmental ratings for outdoor fixed installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSGQ-450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Frequency\u003c\/td\u003e\n\u003ctd\u003e462 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Frequency\u003c\/td\u003e\n\u003ctd\u003e472 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e400-470 MHz (tunable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Input Power\u003c\/td\u003e\n\u003ctd\u003e50W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsertion Loss\u003c\/td\u003e\n\u003ctd\u003e1.2 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e75 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eN female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 400-470MHz UHF Duplexer delivers sensible performance for small repeater systems: it is a good value for hobbyists and small-club operators who need a tunable, preset duplexer with solid isolation and N female connectors. Buy it if you operate at or near the preset 462\/472 MHz pair or want a tunable, low-power solution; professional higher-power sites should choose a unit rated above 50W.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the duplexer be retuned to other frequencies within 400-470MHz?\u003c\/strong\u003e\u003cbr\u003eYes, it is tunable across the 400-470MHz UHF range so installers can adjust it to other channel pairs within that band.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat connector type does it use?\u003c\/strong\u003e\u003cbr\u003eThe duplexer is equipped with N female connectors for both transmit and receive ports.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this suitable for high-power repeater sites?\u003c\/strong\u003e\u003cbr\u003eNot for high-power sites; the duplexer is rated for a maximum input power of 50W and is best for low-power or hobby repeaters.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":48259131310299,"sku":"B0DPFSWPBP","price":107.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/7147c4lLWrL._AC_SL1500.jpg?v=1778297883","url":"https:\/\/gearmusthave.com\/products\/400-470mhz-uhf-duplexer-50w-radio-repeater-duplexer-tunable","provider":"GearMustHave","version":"1.0","type":"link"}