{"id":49394,"date":"2022-09-09T10:52:05","date_gmt":"2022-09-09T08:52:05","guid":{"rendered":"https:\/\/pihernz.com\/?post_type=product&p=49394"},"modified":"2026-07-17T12:44:27","modified_gmt":"2026-07-17T10:44:27","slug":"moonraker-swr-300-swr-power-meter","status":"publish","type":"product","link":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/","title":{"rendered":"Moonraker SWR-300 VHF\/UHF SWR and Power Meter \u2013 Compact 120-500 MHz Standing-Wave Indicator with Dual SO-239 Connectors"},"content":{"rendered":"

The Moonraker SWR-300<\/strong> is a highly accurate, compact, and professional-grade dual-function test meter engineered specifically to measure forward\/reflected transmission power and the Standing-Wave Ratio (SWR) of radio equipment operating across the 120 to 500 MHz VHF\/UHF spectrum<\/strong>. Designed for bench technicians, radio installers, and amateur radio enthusiasts, this reliable diagnostic tool is an essential asset for verifying the health, tuning efficiency, and electrical condition of any 50-Ohm antenna system and matching transceiver setup.<\/p>\n

Capable of monitoring RF power levels ranging from 0.5W up to 150 Watts<\/strong>, the Moonraker SWR-300 provides the precise operational visibility required to protect valuable radio transceivers from damage caused by impedance mismatches. The front panel features a high-visibility analog display meter alongside intuitive mechanical slide switches, allowing users to effortlessly toggle between SWR measurement and Power (PWR) readings, as well as adjusting scale calibration via the integrated rotary dial. Its robust, pocket-sized metal housing isolates internal components from stray RF fields, making it highly suitable for both desktop base station diagnostics and field-service maintenance tasks.<\/p>\n

For seamless inline transmission line integration, the SWR-300 is outfitted with two heavy-duty, chassis-mounted SO-239 (UHF Female) connectors<\/strong>, ensuring low insertion loss and a solid mechanical link with standard PL-259 terminated coaxial cables. Weighing only 248 grams and measuring a compact 130 x 60 x 35 mm, this portable test meter fits comfortably in any technical toolkit, providing immediate, battery-free diagnostic capabilities wherever your radio communication fleet deployment takes you.<\/p>\n

Key Features<\/h2>\n
    \n
  • Dual-Function Diagnostics:<\/strong> Provides accurate, real-time measurements of both RF transmission power and antenna system Standing-Wave Ratio (SWR).<\/li>\n
  • Broad VHF\/UHF Coverage:<\/strong> Operates seamlessly across the 120 MHz to 500 MHz frequency range, ideal for marine VHF, amateur 2m\/70cm, PMR-446, and commercial land mobile bands.<\/li>\n
  • 150W Power Capacity:<\/strong> Supports testing on low-power handhelds as well as high-power mobile transceivers from 0.5W up to 150 Watts.<\/li>\n
  • Heavy-Duty SO-239 Ports:<\/strong> Outfitted with two high-grade UHF Female coaxial sockets for reliable, low-loss inline installation.<\/li>\n
  • Rugged & Compact Chassis:<\/strong> Housed in a durable, RF-shielded metal enclosure measuring just 130 x 60 x 35 mm for maximum portability.<\/li>\n
  • Battery-Free Operation:<\/strong> Operates passively by utilizing the transmitter’s RF signal energy, ensuring the meter is always ready for immediate field troubleshooting.<\/li>\n<\/ul>\n

    Technical Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
    Brand<\/td>\nMoonraker<\/td>\n<\/tr>\n
    Model Designation<\/td>\nSWR-300<\/td>\n<\/tr>\n
    Product Type<\/td>\nVHF\/UHF SWR & Power Test Meter<\/td>\n<\/tr>\n
    Frequency Range<\/td>\n120 \u2013 500 MHz<\/td>\n<\/tr>\n
    Power Measurement Scale<\/td>\n0.5 \u2013 150 Watts<\/td>\n<\/tr>\n
    Nominal Impedance<\/td>\n50 Ohms<\/td>\n<\/tr>\n
    Coaxial Connector Interface<\/td>\n2x SO-239 (UHF Female, Input\/Output)<\/td>\n<\/tr>\n
    Device Dimensions<\/td>\n130 mm \u00d7 60 mm \u00d7 35 mm<\/td>\n<\/tr>\n
    Net Weight<\/td>\n248 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Package Content<\/h2>\n
      \n
    • 1x Moonraker SWR-300 VHF\/UHF SWR & Power Meter Unit<\/li>\n
    • 1x Quick Start Calibration Guide<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

      SWR\/power meter<\/p>\n","protected":false},"featured_media":49389,"template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","inline_featured_image":false,"_joinchat":[]},"product_brand":[12526],"product_cat":[12275],"product_tag":[12985],"class_list":{"0":"post-49394","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-moonraker-en","7":"product_cat-accesorios-emisoras-en","8":"product_tag-cb-en","10":"first","11":"instock","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"acf":[],"yoast_head":"\nMoonraker SWR-300 Test Meter | 120-500MHz SWR & Power<\/title>\n<meta name=\"description\" content=\"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Moonraker SWR-300 Test Meter | 120-500MHz SWR & Power\" \/>\n<meta property=\"og:description\" content=\"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/\" \/>\n<meta property=\"og:site_name\" content=\"Pihernz Comunicaciones\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/pihernz.comunicaciones\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-17T10:44:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/pihernz.com\/wp-content\/uploads\/2022\/09\/Moonraker-SWR-300_1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@pihernz\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/\",\"url\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/\",\"name\":\"Moonraker SWR-300 Test Meter | 120-500MHz SWR & Power\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/pihernz.com\\\/wp-content\\\/uploads\\\/2022\\\/09\\\/Moonraker-SWR-300_1.png\",\"datePublished\":\"2022-09-09T08:52:05+00:00\",\"dateModified\":\"2026-07-17T10:44:27+00:00\",\"description\":\"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/#primaryimage\",\"url\":\"https:\\\/\\\/pihernz.com\\\/wp-content\\\/uploads\\\/2022\\\/09\\\/Moonraker-SWR-300_1.png\",\"contentUrl\":\"https:\\\/\\\/pihernz.com\\\/wp-content\\\/uploads\\\/2022\\\/09\\\/Moonraker-SWR-300_1.png\",\"width\":1200,\"height\":1200,\"caption\":\"Moonraker SWR-300 Medidor de ondas estacionarias\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/en\\\/producto\\\/moonraker-swr-300-swr-power-meter\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\\\/\\\/pihernz.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/pihernz.com\\\/en\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Moonraker SWR-300 VHF\\\/UHF SWR and Power Meter \u2013 Compact 120-500 MHz Standing-Wave Indicator with Dual SO-239 Connectors\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/#website\",\"url\":\"https:\\\/\\\/pihernz.com\\\/\",\"name\":\"www.pihernz.com\",\"description\":\"Expertos en radiocomunicaciones\",\"publisher\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/#organization\"},\"alternateName\":\"Pihenrz\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/pihernz.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/#organization\",\"name\":\"Pihernz comunicaciones S.A.\",\"alternateName\":\"Pihernz\",\"url\":\"https:\\\/\\\/pihernz.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/pihernz.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/pihernz.com\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/logo.svg\",\"contentUrl\":\"https:\\\/\\\/pihernz.com\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/logo.svg\",\"width\":178,\"height\":39,\"caption\":\"Pihernz comunicaciones S.A.\"},\"image\":{\"@id\":\"https:\\\/\\\/pihernz.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/pihernz.comunicaciones\\\/\",\"https:\\\/\\\/x.com\\\/pihernz\",\"https:\\\/\\\/www.instagram.com\\\/pihernzcomunicaciones\\\/\",\"https:\\\/\\\/es.linkedin.com\\\/company\\\/pihernz-comunicaciones\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Moonraker SWR-300 Test Meter | 120-500MHz SWR & Power","description":"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/","og_locale":"en_US","og_type":"article","og_title":"Moonraker SWR-300 Test Meter | 120-500MHz SWR & Power","og_description":"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.","og_url":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/","og_site_name":"Pihernz Comunicaciones","article_publisher":"https:\/\/www.facebook.com\/pihernz.comunicaciones\/","article_modified_time":"2026-07-17T10:44:27+00:00","og_image":[{"width":1200,"height":1200,"url":"https:\/\/pihernz.com\/wp-content\/uploads\/2022\/09\/Moonraker-SWR-300_1.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_site":"@pihernz","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/","url":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/","name":"Moonraker SWR-300 Test Meter | 120-500MHz SWR & Power","isPartOf":{"@id":"https:\/\/pihernz.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/#primaryimage"},"image":{"@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/#primaryimage"},"thumbnailUrl":"https:\/\/pihernz.com\/wp-content\/uploads\/2022\/09\/Moonraker-SWR-300_1.png","datePublished":"2022-09-09T08:52:05+00:00","dateModified":"2026-07-17T10:44:27+00:00","description":"B2B trade supply of the Moonraker SWR-300 SWR and power meter. Measures 120-500 MHz, handles up to 150W, and features dual SO-239 coaxial connectors.","breadcrumb":{"@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/#primaryimage","url":"https:\/\/pihernz.com\/wp-content\/uploads\/2022\/09\/Moonraker-SWR-300_1.png","contentUrl":"https:\/\/pihernz.com\/wp-content\/uploads\/2022\/09\/Moonraker-SWR-300_1.png","width":1200,"height":1200,"caption":"Moonraker SWR-300 Medidor de ondas estacionarias"},{"@type":"BreadcrumbList","@id":"https:\/\/pihernz.com\/en\/producto\/moonraker-swr-300-swr-power-meter\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Portada","item":"https:\/\/pihernz.com\/en\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/pihernz.com\/en\/shop\/"},{"@type":"ListItem","position":3,"name":"Moonraker SWR-300 VHF\/UHF SWR and Power Meter \u2013 Compact 120-500 MHz Standing-Wave Indicator with Dual SO-239 Connectors"}]},{"@type":"WebSite","@id":"https:\/\/pihernz.com\/#website","url":"https:\/\/pihernz.com\/","name":"www.pihernz.com","description":"Expertos en radiocomunicaciones","publisher":{"@id":"https:\/\/pihernz.com\/#organization"},"alternateName":"Pihenrz","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/pihernz.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/pihernz.com\/#organization","name":"Pihernz comunicaciones S.A.","alternateName":"Pihernz","url":"https:\/\/pihernz.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/pihernz.com\/#\/schema\/logo\/image\/","url":"https:\/\/pihernz.com\/wp-content\/uploads\/2020\/09\/logo.svg","contentUrl":"https:\/\/pihernz.com\/wp-content\/uploads\/2020\/09\/logo.svg","width":178,"height":39,"caption":"Pihernz comunicaciones S.A."},"image":{"@id":"https:\/\/pihernz.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/pihernz.comunicaciones\/","https:\/\/x.com\/pihernz","https:\/\/www.instagram.com\/pihernzcomunicaciones\/","https:\/\/es.linkedin.com\/company\/pihernz-comunicaciones"]}]}},"_links":{"self":[{"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/product\/49394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/media\/49389"}],"wp:attachment":[{"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/media?parent=49394"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/product_brand?post=49394"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/product_cat?post=49394"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pihernz.com\/en\/wp-json\/wp\/v2\/product_tag?post=49394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}