{"product_id":"sirio-sd27-dipole-27mhz-antenne","title":"Sirio SD 27 Dipole 27MHz antenna","description":"\u003cp\u003eThe \u003cstrong\u003eSirio SD 27 Dipole\u003c\/strong\u003e is a high-quality dipole antenna for users who expect maximum performance from their base station. This professional Sirio antenna is designed for reliable communication within the \u003cstrong\u003efrequency range of 26.5 to 30 MHz\u003c\/strong\u003e, making it excellent for use as a 27MC antenna and for the 10-meter amateur band.\u003c\/p\u003e\n\u003cp\u003eThanks to its robust construction, high power capacity, and excellent tuneability, this base antenna offers stable performance under various conditions. Whether you are an amateur radio operator, making DX connections, or want to build a powerful 27MC base station, the Sirio SD 27 Dipole delivers the reliability and quality for which Sirio is globally renowned.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional base antenna for optimal range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSirio SD 27 Dipole is constructed as a 1\/2 λ dipole antenna\u003c\/strong\u003e and offers an omnidirectional radiation pattern. This provides uniform coverage around the antenna, ideal for local and longer-range connections.\u003c\/p\u003e\n\u003cp\u003eWith a \u003cstrong\u003egain of 2.15 dBi\u003c\/strong\u003e and a \u003cstrong\u003ewide bandwidth of more than 3.5 MHz at an SWR of maximum 2\u003c\/strong\u003e, this antenna is easy to tune within the full frequency range of 26.5 to 30 MHz.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003ewaterproof coupling sleeve protects the connections from moisture and weather influences\u003c\/strong\u003e, making the antenna suitable for long-term outdoor installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDeveloped for high power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis Sirio antenna is designed for users who operate with higher transmission powers. The SD 27 Dipole \u003cstrong\u003eeffortlessly handles a maximum of 1000 Watts continuous (CW)\u003c\/strong\u003e and even \u003cstrong\u003eup to 3000 Watts for short periods.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThanks to the use of high-quality materials such as \u003cstrong\u003ealuminum alloy 6063 T-832, galvanized steel, and Zamak\u003c\/strong\u003e, this base antenna offers an excellent combination of strength, durability, and performance.\u003c\/p\u003e\n\u003cp\u003eWith a \u003cstrong\u003etotal length of over 5.5 meters\u003c\/strong\u003e, the antenna delivers optimal efficiency within the 27 MHz frequency range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy choose the Sirio SD 27 Dipole?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003eProfessional dipole antenna for base stations\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eSuitable as a 27MC antenna and for the 10-meter amateur band\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eTunable from 26.5 to 30 MHz\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eWaterproof coupling sleeve for long-term outdoor use\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eHigh power up to 1000 Watts continuous and 3000 Watts peak\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eRobust construction from high-quality materials\u003cbr\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003eOmnidirectional radiation pattern for optimal coverage\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eThe Sirio SD 27 Dipole is the ideal choice for anyone looking for a reliable base antenna with excellent performance on the 27MC band and the 10-meter amateur band. Thanks to the combination of quality, power, and durability, you are assured of years of interference-free use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable parts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003ca title=\"Sirio SA088 antenna mounting kit for Sirio SD and SY series antennas\" href=\"https:\/\/www.deltron.nl\/products\/sirio-sa088-q-sd-sy-serie\"\u003eSirio SA088\/Q\u003c\/a\u003e mounting set for SD\/SY series antennas\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003ca href=\"https:\/\/www.deltron.nl\/products\/si-sa089q\" title=\"Sirio SA089 set mounting sleeves for Sirio SD and SY series antennas\"\u003eSirio SA089\/Q\u003c\/a\u003e mounting sleeves for the SD\/SY series antennas\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eOrder your Sirio SD 27 Dipole today at Deltron.nl and bring professional communication performance to your base station.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation of the Sirio SD Dipole\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Sirio SD Dipole, such as the popular SD-27 and SD-FM models, can be mounted in various ways. The performance of the antenna depends on the chosen setup and polarization.\u003c\/p\u003e\n\u003col\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eVertical mounting:\u003c\/strong\u003e In a vertical installation, the two antenna elements point straight up and down. In this configuration, the antenna operates omnidirectionally, meaning signals are transmitted and received equally in all directions. This setup is ideal for general local and mobile traffic where communication around the antenna is desired.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHorizontal mounting:\u003c\/strong\u003e In a horizontal installation, the antenna elements are perpendicular to the mast and point left and right. In this configuration, the antenna becomes more directional, allowing signals from certain directions to be better received and transmitted. This can offer advantages for specific connections or fixed communication links.\u003c\/li\u003e\n\n\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eImportant considerations during installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMast mounting:\u003c\/strong\u003e The antenna comes with a sturdy mounting bracket suitable for masts with a diameter of approximately 35 to 52 mm.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eGamma Match adjustment:\u003c\/strong\u003e The Gamma Match (the antenna's tuning unit) must be correctly mounted for optimal performance. In vertical mounting, the Gamma Match is located at the top of the dipole. In horizontal mounting, it should be directed upwards or horizontally, depending on the instructions in the manual.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAntenna tuning:\u003c\/strong\u003e For optimal performance, the antenna must be tuned to the desired frequency band, such as the 11-meter CB band, 10-meter amateur band, or other applicable frequencies. This is done by adjusting the length of the radiators according to the supplied tuning instructions.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eConnecting the coaxial cable\u003c\/strong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e: \u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eRun the coaxial cable (e.g., RG-58 or RG-213 with PL-259 connector) as straight as possible downwards from the feed point. Also, ensure a good waterproof seal of the connectors to prevent moisture problems and performance loss.\u003c\/span\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003eCorrect installation and SWR tuning ensure that the Sirio SD Dipole performs optimally and enables reliable communication for years.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMounting instructions for the antenna elements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese instructions can also be found in English on the last two product photos. You can also \u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003edownload the manual on this page, which can be found under the 'manual' tab below the product photos.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e1.0 Extend the telescopic elements by pulling out the Ø12 tube and assemble the connecting sleeve. Secure the first element with the supplied Phillips screw. Then mount the second connecting sleeve, slide the top Ø8 tube including the PVC end cap together, and secure the end with the supplied Phillips screw.\u003c\/li\u003e\n\n\u003cli\u003e1.1 Placement of the elements on the boom - See the image in the instructions.\u003c\/li\u003e\n\n\u003cli\u003e1.2 Mounting of the elements on the boom. Slide the tuning element of the Gamma Match over one of the dipole radiator elements. Then place the elements in the metal holder and secure them with the supplied screws and Allen key.\u003c\/li\u003e\n\n\u003cli\u003e2.0 Mounting the Gamma Match. Extend the last tube of the Gamma Match to a length of L1 = 485 mm. Attach the flattened Ø12 end to the connector using the supplied nut and washer, but do not fully tighten yet. Slide the tuning element towards the boom and extend the Ø8 end of the Gamma Match to a length of L = 890 mm. Then secure the tuning element with the supplied screw and Allen key. Double-check that dimensions L and L1 are correct. Then definitively tighten the nut on the flattened part of the Gamma Match and place the PVC protective cap.\u003c\/li\u003e\n\n\u003cli\u003e3.0 Mounting the bracket on the antenna boom. See the image in the instructions.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo not overtighten the nuts you use to secure it. \u003cspan style=\"text-decoration: underline;\"\u003eExcessive tightening torque can cause damage to the antenna.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e3.1 Mounting on the support tube. See the image in the instructions.\u003c\/li\u003e\n\n\u003cli\u003e4.0 Connecting the coaxial cable. See the image in the instructions.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Sirio","offers":[{"title":"Default Title","offer_id":44158215520441,"sku":"2105301.00","price":92.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/3052\/8953\/files\/Sirio-SD-27-dipole-basisantenne-voor-27MHz.webp?v=1780562693","url":"https:\/\/www.deltron.nl\/en\/products\/sirio-sd27-dipole-27mhz-antenne","provider":"Deltron","version":"1.0","type":"link"}