{"id":64528,"date":"2024-05-16T11:34:10","date_gmt":"2024-05-16T10:34:10","guid":{"rendered":"https:\/\/pihernz.com\/?post_type=product&p=64528"},"modified":"2026-07-03T10:55:32","modified_gmt":"2026-07-03T08:55:32","slug":"avair-av-21c-duplexer","status":"publish","type":"product","link":"https:\/\/pihernz.com\/en\/producto\/avair-av-21c-duplexer\/","title":{"rendered":"Avair AV-21C Premium RF Duplexer \u2013 High-Isolation Splitter\/Combiner Covering 1.6-225MHz & 350-540MHz Bands with Mixed SO-239 & N-Type Connector Interface"},"content":{"rendered":"

Professional High-Power RF Signal Splitting and Isolation Infrastructure<\/h2>\n

The Avair AV-21C<\/strong> is a commercial-grade, high-performance radio frequency duplexer engineered to combine or separate signal streams across dual target frequency windows: 1.6 to 225 MHz<\/strong> (HF\/VHF spectrum) and 350 to 540 MHz<\/strong> (UHF spectrum). This premium splitter\/combiner network allows operators to route multi-band transceivers into dedicated single-band antennas, or feed multiple base stations into a single transmission line without cross-talk or physical hardware modification. It stands as a critical utility asset for maritime communication hubs, emergency response dispatch stations, corporate fleet control rooms, and specialized B2B radio accessory distribution networks across Europe.<\/p>\n

The advanced technical architecture features an internal low-loss filter network built to handle substantial peak load capacities across diverse bands, enabling high-power deployments up to 1 kW (PEP)<\/strong> on low HF channels (1.6\u201330 MHz), 250 W (PEP)<\/strong> across VHF frequencies (49\u2013225 MHz), and 200 W (PEP)<\/strong> down the UHF block (350\u2013540 MHz). To protect sensitive multi-receiver setups from close-in harmonic interference and transmitter overload, the solid shield casing provides a strict cross-band isolation rating of greater than 50 dB<\/strong>. Operating at a precisely tuned characteristic impedance of 50 Ohms<\/strong>, this heavy-duty 300 g accessory delivers minimal insertion loss, safeguarding the RF power amplifier modules of connected transceivers from damage caused by standing wave mismatches.<\/p>\n

To support high-frequency efficiency and diverse terminal hookups, the duplexer incorporates an integrated dual-cable pigtail layout terminated with specialized mechanical connector standards. The common port features a rugged, chassis-mounted SO-239 (UHF-Female)<\/strong> socket, while the low-pass and high-pass cable leads branch out into precision-machined PL-259 (UHF-Male)<\/strong> and high-frequency N-Male<\/strong> connectors. These heavy-duty threaded coupling rings guarantee a flush, vibration-proof electrical bond that eliminates signal degradation, ensuring absolute operational fleet readiness in harsh fixed or vehicular installation environments.<\/p>\n

Verified Technical Specifications Matrix<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Technical Specification Parameter<\/th>\nManufacturer Value<\/th>\n<\/tr>\n<\/thead>\n
Product Brand Manufacturer<\/td>\nAvair<\/td>\n<\/tr>\n
Hardware Model Designation<\/td>\nAV-21C<\/td>\n<\/tr>\n
Primary Component Classification<\/td>\nRF Coaxial Duplexer \/ Frequency Combiner-Splitter<\/td>\n<\/tr>\n
Passband Frequency Ranges<\/td>\nPort A: 1.6 \u2013 225 MHz | Port B: 350 \u2013 540 MHz<\/td>\n<\/tr>\n
Peak Transmit Load Capacities<\/td>\n1.6-30 MHz: 1 kW (PEP) | 49-225 MHz: 250 W (PEP) | 350-540 MHz: 200 W (PEP)<\/td>\n<\/tr>\n
Cross-Band Port Isolation<\/td>\n> 50 dB Minimum Suppression<\/td>\n<\/tr>\n
System Characteristic Impedance<\/td>\n50 Ohms Nominal Calibration<\/td>\n<\/tr>\n
Interface Connector Standard<\/td>\nChassis: SO-239 (UHF Female) | Leads: PL-259 (UHF Male) & N-Male Matrix<\/td>\n<\/tr>\n
Net Hardware Component Weight<\/td>\n300 grams<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Duplexer<\/p>\n","protected":false},"featured_media":70045,"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":[12750],"product_cat":[12325,12328],"product_tag":[],"class_list":{"0":"post-64528","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-avair-en","7":"product_cat-accesorios-de-antenas-en","8":"product_cat-duplexores-accesorios-de-antenas-en-2","10":"first","11":"instock","12":"taxable","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"acf":[],"yoast_head":"\nAvair AV-21C Duplexer | 1.6-225MHz & 350-540MHz Splitter | B2B<\/title>\n<meta name=\"description\" content=\"Source the professional Avair AV-21C RF duplexer. 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