{"product_id":"diamond-rhm-12-portable-hf-to-70cm-antenna-7-430mhz","title":"Diamond RHM-12 Portable HF to 70cm Antenna 7-430MHz","description":"\u003cp\u003eThe \u003cstrong\u003eDiamond RHM-12\u003c\/strong\u003e is a compact, adjustable portable antenna designed for amateur radio operation from \u003cstrong\u003e7MHz to 430MHz\u003c\/strong\u003e, covering HF, 6m, 2m and 70cm operation in a single portable antenna system.\u003c\/p\u003e\u003cp\u003eIts adjustable screwdriver-style design allows the antenna to be tuned for the required operating frequency by changing the element position. The telescopic construction extends from approximately \u003cstrong\u003e0.6m to 2.75m\u003c\/strong\u003e, making it well suited to portable and temporary station use.\u003c\/p\u003e\u003cp\u003eThe RHM-12 uses a \u003cstrong\u003e1\/4-wave configuration from HF to 50MHz\u003c\/strong\u003e and a \u003cstrong\u003e5\/8-wave configuration on 144MHz and 430MHz\u003c\/strong\u003e. Maximum input power is \u003cstrong\u003e120W SSB\u003c\/strong\u003e or \u003cstrong\u003e40W FM\/CW\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eFor operation on the lower 1.9MHz and 3.5MHz bands, Diamond offers the optional \u003cstrong\u003eRHMC12 coil set\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWide frequency coverage from 7-430MHz\u003c\/li\u003e\n\u003cli\u003eSuitable for HF, 6m, 2m and 70cm amateur bands\u003c\/li\u003e\n\u003cli\u003eAdjustable screwdriver-style tuning system\u003c\/li\u003e\n\u003cli\u003eTelescopic design from approximately 0.6m to 2.75m\u003c\/li\u003e\n\u003cli\u003e1\/4-wave configuration from HF to 50MHz\u003c\/li\u003e\n\u003cli\u003e5\/8-wave configuration on 144MHz and 430MHz\u003c\/li\u003e\n\u003cli\u003eMaximum 120W SSB input power\u003c\/li\u003e\n\u003cli\u003eMaximum 40W FM\/CW input power\u003c\/li\u003e\n\u003cli\u003e50 Ohm impedance\u003c\/li\u003e\n\u003cli\u003ePL-259 \/ M-P male connector\u003c\/li\u003e\n\u003cli\u003eApproximately 350g\u003c\/li\u003e\n\u003cli\u003eOptional RHMC12 coil set available for 1.9MHz and 3.5MHz operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Diamond Antenna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RHM12\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAntenna Type:\u003c\/strong\u003e Portable screwdriver-type antenna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Frequency Range:\u003c\/strong\u003e 7-430MHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Lower Bands:\u003c\/strong\u003e 1.9MHz \/ 3.5MHz with RHMC12 coil set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 1\/4-wave HF-50MHz; 5\/8-wave 144\/430MHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Power:\u003c\/strong\u003e 120W SSB \/ 40W FM-CW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 50 Ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e Approx. 0.6-2.75m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength When Separated:\u003c\/strong\u003e Approx. 0.4m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 350g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e M-P \/ PL-259 male\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eImportant Operating Information\u003c\/h3\u003e\u003cp\u003eThe RHM-12 requires an appropriate ground or counterpoise for normal HF operation. When vehicle-mounted, the antenna mount should have proper electrical continuity with the vehicle body. The antenna is intended for stationary or portable operation and should not be used while the vehicle is moving or during rain or strong winds.\u003c\/p\u003e","brand":"Diamond","offers":[{"title":"Default Title","offer_id":58495659344216,"sku":"MOON-99-238","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/8753\/5192\/files\/2024_10_24_10_15_15_diamond_rhm_12_portable_antenna_for_hf_to_70cm_and_3_more_pages_profile_1_mi_1.jpg?v=1789655491","url":"https:\/\/kamsat.co.uk\/products\/diamond-rhm-12-portable-hf-to-70cm-antenna-7-430mhz","provider":"Kamsat","version":"1.0","type":"link"}