{"id":91575,"date":"2026-03-06T12:29:57","date_gmt":"2026-03-06T11:29:57","guid":{"rendered":"https:\/\/pihernz.com\/?post_type=product&p=91575"},"modified":"2026-07-14T16:22:42","modified_gmt":"2026-07-14T14:22:42","slug":"diamond-cmf-2000b-antenna-filter-1-54mhz","status":"publish","type":"product","link":"https:\/\/pihernz.com\/en\/producto\/diamond-cmf-2000b-antenna-filter-1-54mhz\/","title":{"rendered":"Diamond CMF-2000B Common-Mode Choke Filter \u2013 1-54 MHz HF\/6m Line Isolator with 2 kW PEP Power Rating (SO-239 Connectors)"},"content":{"rendered":"

The Diamond CMF-2000B<\/strong> is a highly effective, professional-grade common-mode choke filter and line isolator engineered to resolve challenging Electromagnetic Interference (EMI), RF feedback, and Television Interference (TVI) in your station setup. Developed by the RF specialists at Diamond Antenna, this heavy-duty filter prevents stray RF currents from traveling back down the outer shield of your coaxial transmission cable\u2014a common cause of distorted audio, computer lock-ups, and interference with surrounding household electronics.<\/p>\n

Operating seamlessly across a broad frequency spectrum from 1 to 54 MHz<\/strong>, the CMF-2000B provides complete protection for the HF amateur bands, CB radio (27 MHz), and the 6-meter (50 MHz) band. It serves a dual purpose as an RF choke line isolator and low-pass filter, effectively eliminating unwanted harmonic frequencies outside the core 1-54 MHz operating range. Designed to support high-power stations, it handles up to 2 kW PEP (Peak Envelope Power)<\/strong>. It connects inline using standard female UHF (SO-239 \/ MJ) connectors.<\/p>\n

The internal architecture of the CMF-2000B is optimized for minimal insertion loss, keeping it under 0.3 dB. It exhibits an incredibly low Standing Wave Ratio (SWR) of less than 1.2:1 to protect your transceiver’s power amplifier. Common-mode signal currents are heavily attenuated, achieving an attenuation level greater than -30 dB. Housed in a durable, weather-insulated cylindrical shell measuring 380 mm in length and weighing 610 g, this filter is built for years of reliable, maintenance-free service.<\/p>\n

Key Features<\/h2>\n
    \n
  • Common-Mode Interference Prevention:<\/strong> Effectively isolates and blocks stray RF current on the coaxial cable shield, eliminating TVI and EMI\/CEM issues.<\/li>\n
  • Broad 1\u201354 MHz Range:<\/strong> Perfect for HF amateurs, CB operators (27 MHz), and the 6m (50 MHz) band.<\/li>\n
  • High Power Handling:<\/strong> Capable of handling up to 2 kW PEP, making it ideal for high-power linear amplifiers.<\/li>\n
  • Superior Attenuation:<\/strong> Delivers common-mode attenuation greater than -30 dB.<\/li>\n
  • Ultra-Low Insertion Loss:<\/strong> Under 0.3 dB of loss preserves your transmitter’s signal strength.<\/li>\n
  • Rugged Housing with SO-239 Connectors:<\/strong> Fitted with durable MJ (UHF Female \/ SO-239) connectors for easy transmission line installation.<\/li>\n<\/ul>\n

    Technical Specifications<\/h2>\n\n\n\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>\nDiamond Antenna<\/td>\n<\/tr>\n
    Model Designation<\/td>\nCMF-2000B<\/td>\n<\/tr>\n
    Product Type<\/td>\nCommon-Mode Choke & Line Isolator<\/td>\n<\/tr>\n
    Frequency Coverage<\/td>\n1 \u2013 54 MHz<\/td>\n<\/tr>\n
    Maximum Power Rating<\/td>\n2 kW PEP (2000W)<\/td>\n<\/tr>\n
    Common-Mode Attenuation<\/td>\nGreater than \u201330 dB (max.)<\/td>\n<\/tr>\n
    Insertion Loss<\/td>\nLess than 0.3 dB<\/td>\n<\/tr>\n
    SWR (Standing Wave Ratio)<\/td>\nLess than 1.2<\/td>\n<\/tr>\n
    Nominal Impedance<\/td>\n50 Ohms<\/td>\n<\/tr>\n
    Connector Type<\/td>\nUHF Female (MJ \/ SO-239)<\/td>\n<\/tr>\n
    Physical Length<\/td>\n380 mm (including connectors)<\/td>\n<\/tr>\n
    Net Weight<\/td>\n610 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Package Content<\/h2>\n
      \n
    • 1x Diamond CMF-2000B Antenna Filter \/ Line Isolator<\/li>\n
    • 1x Quick Start Mounting Guide<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

      Antenna Filter<\/p>\n","protected":false},"featured_media":91574,"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":[12171],"product_cat":[12325,12329],"product_tag":[],"class_list":{"0":"post-91575","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-diamond-antenna-en","7":"product_cat-accesorios-de-antenas-en","8":"product_cat-otros-en-2","10":"first","11":"instock","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"acf":[],"yoast_head":"\nDiamond CMF-2000B Antenna Filter | 2 kW Common-Mode Choke<\/title>\n<meta name=\"description\" content=\"B2B trade supply of the Diamond CMF-2000B common-mode filter. Operates 1-54 MHz, handles up to 2 kW PEP, prevents TVI\/EMI, and uses SO-239 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\/diamond-cmf-2000b-antenna-filter-1-54mhz\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diamond CMF-2000B Antenna Filter | 2 kW Common-Mode Choke\" \/>\n<meta property=\"og:description\" content=\"B2B trade supply of the Diamond CMF-2000B common-mode filter. 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