{"title":"Accessories \u0026 Hardware | Tilt Bases, Whip, Extensions, Stainless Kits","description":"\u003cp\u003eThe two ends of the system and everything that keeps it standing: the Tilt-Up Base that brings the top down to you, the 9' DX Whip that goes on it, extensions, mounts, and the stainless hardware kits from our swap program. Hand-built in Sun Valley, Idaho. Buy now on any of them; no waiting list.\u003c\/p\u003e","products":[{"product_id":"4-extension-kit-dx-flagpole-vertical-antenna","title":"4' Vertical Extension: Increased Aperture \u0026 Low-Band Efficiency","description":"\u003ch2\u003e\u003cb\u003e4’ Extension for DX Flagpole Antenna and DX Vertical Antennas \u003c\/b\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan\u003eIncludes 4' upper section and the transition section (splice) with matching stainless hardware. \u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1adg3ll r-1g7jtus r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-b88u0q r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1x3r274\"\u003e\u003cb\u003eAperture Discovery:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1adg3ll r-1g7jtus r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-b88u0q r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1x3r274\"\u003eThis precision add-on provides the electrical length needed to boost your antenna's capture area, or aperture, maximizing \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1adg3ll r-1g7jtus r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-b88u0q r-1x3r274\"\u003e\u003cspan class=\"css-1jxf684 r-bcqeeo r-1ttztb7 r-qvutc0 r-poiln3 r-1x3r274\"\u003e\u003cspan data-math=\"\\mathbf{dBi}\" class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan aria-hidden=\"true\" class=\"katex-html\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord\"\u003e\u003cspan class=\"mord mathbf\"\u003edBi\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e gain and lowering the radiation angle on your favorite \u003cspan data-math=\"\\text{DX}\" class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan aria-hidden=\"true\" class=\"katex-html\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003eDX\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e bands. For those who can go higher, it's the smart, simple way to find more gain from your \u003cspan data-math=\"\\text{HOA}\" class=\"math-inline\"\u003e\u003cspan class=\"katex\"\u003e\u003cspan aria-hidden=\"true\" class=\"katex-html\"\u003e\u003cspan class=\"base\"\u003e\u003cspan class=\"mord text\"\u003e\u003cspan class=\"mord\"\u003eHOA\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e or small lot.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYou are working DX and would enjoy a little more height. We have you covered with our Extension Kit. Go higher, from 12' to 16', 16' to 20', or 20' to 24' and beyond.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis 4' extension kit may add a little more punch and lower your angle of radiation on the horizon for that deeper DX, and just maybe more DX adventure goes into your logbook. You're welcome!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne famous DX'er reports going from 20-foot to 24-foot, that it is night and day. Others, might not notice as much. Physics is a mysterious process. Enjoy the experimenting at your QTH. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis extension kit of aluminum tubing is cut, drilled, cleaned, polished, and prepared with care, for you. It will seamlessly match your existing vertical antenna by Greyline Performance. (Example: just below the top section of your flagpole or vertical)\u003c\/p\u003e\n\u003cp\u003eAs always, made of the very same Premium materials, Made in the USA, for your HOA DX Flagpole Antenna and GP HF Vertical Dipole Antenna. Another smart, rugged, and elegant ham radio antenna product.\u003cbr\u003e\u003cbr\u003eMore about Greyline Performance Antennas...\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eThe Benefits of\u003cspan\u003e Greyline DX Antennas\u003c\/span\u003e:\u003c\/b\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cstrong\u003eHOA Approved\u003c\/strong\u003e +\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eXYL and neighborhood approved\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNo Radials!\u003c\/b\u003e\u003cspan\u003e needed to achieve the high performance we stand behind\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium-only\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ematerials: Double-dipped \u0026amp; double-walled aluminum, stainless steel parts, Made in the USA\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAll bands from 80-6M including WARC, MARS, etc. \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHigh-Power Standard (1500W) - McMaster Stainless Steel Hardware\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSmart Design, Rugged Materials \u0026amp; Engineering: 80-100 MPH wind rating \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBest in Class Verticals are 'as good or better than any legacy brands you'll find on the market today\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u0026gt;90% and better efficiency across all bands\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eVery Low Losses\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eowing to the feed system\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLower Angles than ground-mounted verticals without laying ground radials\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAvailable sizes 12', 16', 20', 24' and 28' foot Flagpole Antennas \u0026amp; DX Verticals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEasy Install: Dig post hole, drop-in, plug in, play radio\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eXYL \u0026amp; fussy neighbors approve too. Why? \u003c\/h3\u003e\n\u003ch3\u003e\u003cb\u003eCustomer Reviews:\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBill works the world from his Home in an HOA! \u003c\/span\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"XR0ZRC ... one-called him.  Not bad for a 20’ OCD and 100 watts.\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"This Antenna hears far better than I ever expected it to!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Success running a few stations on 40 and 20 CW. I'm pleased with the results\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ci\u003e\u003cspan\u003eSee Bill's DX Flagpole, \u003c\/span\u003e\u003c\/i\u003e\u003ca href=\"https:\/\/flagpoleantenna.com\/blogs\/news\/dx-flagpole-a-passport-to-the-short-waves-in-restricted-neighborhoods-and-hoa-communities\"\u003e\u003ci\u003e\u003cspan\u003ehere\u003c\/span\u003e\u003c\/i\u003e\u003c\/a\u003e\u003ci\u003e\u003cspan\u003e. \u003c\/span\u003e\u003c\/i\u003e \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eSteve A\/B tests his 84' wire Zepp from his HOA\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\"A\/B tested my stealth 84' end-fed and the DX Flagpole.\" \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\"Lit up several USA and EU skimmers on 40\/cw with the flagpole antenna.\"\u003c\/li\u003e\n\u003cli\u003e“The EFLW also lit up skimmers but fewer in EU which gives an idea of the lower angle of radiation by the DX Flagpole.\"\u003c\/li\u003e\n\u003cli\u003e“For DX, worked the XR0, C5DL, and 9G2HO on 40\/30\/20. I'm back into the weekly CWops sprints and have success running stations on 40 and 20 CW. I'm pleased with the results thus far.\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eWant to work the World\u003c\/b\u003e\u003cspan\u003e like Bill and Steve from your home too? How well does your antenna play at your QTH?\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\n\u003cb\u003eWhat customers are saying:\u003c\/b\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Highly Recommended for HOA and CC\u0026amp;R Restricted Ham Radio QTHs.\" \u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Got Indonesia (YB) this morning on 40m SSB with 100 watts. Just over 9,000 miles!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Smart, Efficiently Designed and Ruggedly Engineered Radio Antenna System!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Holds its own vs. taller competitors with no radials \u0026amp; is also stealth!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"Equal or better performance than taller verticals requiring radials!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ci\u003e\u003cspan\u003e\"High power (1500W+) antenna and feed system are now standard!\"\u003c\/span\u003e\u003c\/i\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eRF Blog\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/greylineperformance.com\/blogs\/news\/dx-flagpole-a-passport-to-the-short-waves-in-restricted-neighborhoods-and-hoa-communities\"\u003eDX Flagpole, a passport to the Short-waves in Restricted and HOA Communities!\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/greylineperformance.com\/blogs\/news\/nationwide-hoa-approvals-and-antenna-zoning-for-the-radio-amateur\"\u003eNationwide HOA Approvals and Antenna Zoning For the Radio Amateur\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/greylineperformance.com\/blogs\/news\/a-look-at-mounting-the-ocf-on-the-ground-level-rooftop-or-on-the-tower\"\u003eOCF Vertical Dipole Mounting Scenarios Ground, Boats, Boat Docks, Bulkhead, Roof, \u0026amp; Towers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/greylineperformance.com\/blogs\/news\/news-role\"\u003eDX Flagpole Antenna, Customer Reviews, Pics, Audio, \u0026amp; RBN Signal Data\u003c\/a\u003e  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eA comparison of various Greyline Antenna heights:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/12-28_vs_43R_large.PNG?v=1537981899\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs always, when considering your grounding plans always follow the ARRL RF Guidelines. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\n\u003ca href=\"https:\/\/greylineperformance.com\/pages\/what-to-expect-with-your-dx-flagpole-vertical-dipole-antenna\"\u003e\u003cb\u003eOur Process and What to Expect\u003c\/b\u003e\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/greylineperformance.com\/pages\/backstory\"\u003e\u003cb\u003eMore DX Flagpole History\u003c\/b\u003e\u003c\/a\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cb\u003e\u003cbr\u003eHam Radio is fun again!\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eLet’s get you and your friends back on the air! Your family and friends will appreciate the aesthetically pleasing demeanor and you will work the world from your home or HOA QTH.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eWe enjoy talking radio: \u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWrite in or call us to discuss \u003c\/span\u003e\u003cspan\u003eany\u003c\/span\u003e\u003cspan\u003e questions you have, we’re radio ops too! \u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cb\u003eIt’s an honor to serve you in this manner. \u003c\/b\u003e\u003cb\u003eThank you for the opportunity.\u003cbr\u003e\u003c\/b\u003e\u003cb\u003e\u003cbr\u003e73 Greyline Performance\u003c\/b\u003e\u003c\/p\u003e\n\u003c!-- AUTHORITY ANCHOR BLOCK --\u003e\n\u003cdiv style=\"margin: 32px 0; padding: 24px 28px; background: #fafaf7; border-left: 3px solid #B8960C; font-family: Georgia, 'Times New Roman', serif; font-size: 15px; line-height: 1.7; color: #2a2a2a;\"\u003e\n  \u003cdiv style=\"color: #B8960C; font-size: 11px; letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 10px;\"\u003eWhy this antenna works\u003c\/div\u003e\n  \u003cp style=\"margin: 0 0 12px 0;\"\u003eEvery Greyline design decision traces back to named, published antenna physics — Zavrel W7SX, Kraus W8JK, Severns N6LF on ground systems, Maxwell W2DU on transmission lines, Lewallen W7EL on modeling. Not opinions. Cited works.\u003c\/p\u003e\n  \u003cp style=\"margin: 0;\"\u003e\u003ca href=\"\/pages\/authority-sources\" style=\"color: #8B6F0A; text-decoration: none; border-bottom: 1px dotted #B8960C; font-weight: bold;\"\u003eRead the full shelf →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- \/AUTHORITY ANCHOR BLOCK --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":29402270695491,"sku":"4-ext","price":115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/products\/62493531-4A13-46B9-BCE4-015C749864DF_2baca246-7e94-4fa1-a9ed-41e468fd85b0.png?v=1562944753"},{"product_id":"9-foot-whip-for-greyline-antennas","title":"9' DX Whip | 5\/8-Wave Geometry, Added Aperture | Greyline","description":"\u003cdiv style=\"background: rgb(250, 250, 247); padding-top: 32px; padding-right: 24px; padding-bottom: 32px; border-radius: 8px; margin: 24px 0px;\"\u003e\n\u003cspan style=\"color: rgb(184, 150, 12); font-size: 11px; font-weight: bold; letter-spacing: 2.5px; text-transform: uppercase;\"\u003eDX Performance Parts · Greyline VDA Compatible\u003c\/span\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 860px; margin: 0 auto; padding: 0 0 8px 0;\"\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: bold; color: #1a1a1a; line-height: 1.25; margin: 0 0 14px 0;\"\u003eThe 9' DX Whip — More Aperture. Real Gain. Drop-In Fit.\u003c\/h2\u003e\n\u003cp style=\"color: #b8960c; font-family: 'Courier New',monospace; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; margin: 0 0 12px 0;\"\u003eAll-Band Tuning\u003c\/p\u003e\n\u003ch3 style=\"color: #1a1a1a; font-family: Georgia,serif; font-size: 24px; font-weight: normal; margin: 0 0 16px 0;\"\u003eNine Feet of Adjustable Upper Radiator. Every Band Benefits.\u003c\/h3\u003e\n\u003cp style=\"color: #1a1a1a; font-family: Georgia,serif; font-size: 16px; line-height: 1.7; margin: 0 0 16px 0;\"\u003eAdding the 9' DX Whip extends the upper radiator on any Greyline VDA, shifting the antenna's electrical geometry across the entire 160-6M spectrum. Every band the antenna covers benefits from the added length — right up until the whip is extended past 5\/8λ on a given band, where the lobe pattern begins to break up. Below that ceiling, longer is more efficient on every band.\u003c\/p\u003e\n\u003cp style=\"color: #1a1a1a; font-family: Georgia,serif; font-size: 16px; line-height: 1.7; margin: 0 0 16px 0;\"\u003eThe whip is adjustable from 3' to 11.5', so operators can choose a length that maximizes their highest band of interest. Where the geometry hits 5\/8λ, the modeled gain reaches up to 3.5 dBi at the optimum DX angle over average ground — but that single-band peak is one detail in a broader story. The whip's real job is to give every band on the antenna a longer effective radiator.\u003c\/p\u003e\n\u003ca style=\"color: #b8960c; text-decoration: underline; border-bottom: none;\" href=\"\/pages\/antenna-aperture-and-gain\"\u003eRead the full aperture and gain doctrine →\u003c\/a\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 18px 22px; border-left: 4px solid #B8960C; margin: 0 0 28px 0; max-width: 860px;\"\u003e\n\u003cp style=\"margin: 0 0 6px 0; font-size: 12px; font-weight: bold; color: #b8960c; text-transform: uppercase; letter-spacing: 1px;\"\u003eDirect Fit\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 15px; line-height: 1.6; color: #e8e6e0;\"\u003eCompatible with all DXF and DXV models — 12, 16, 20, 24, and 28 foot. No tools beyond hand-tight. No modification to the antenna required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin: 0 0 28px 0; max-width: 860px;\"\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #DDD8CC; border-top: 3px solid #B8960C; padding: 18px;\"\u003e\n\u003cp style=\"font-size: 12px; font-weight: bold; color: #b8960c; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 6px 0;\"\u003eAperture Added\u003c\/p\u003e\n\u003cp style=\"font-size: 20px; font-weight: bold; color: #1a1a1a; margin: 0 0 4px 0;\"\u003e9 Feet\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555; margin: 0;\"\u003eShifts 5\/8λ sweet spot by one full model size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #DDD8CC; border-top: 3px solid #B8960C; padding: 18px;\"\u003e\n\u003cp style=\"font-size: 12px; font-weight: bold; color: #b8960c; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 6px 0;\"\u003ePeak MODELED Gain\u003c\/p\u003e\n\u003cp style=\"font-size: 20px; font-weight: bold; color: #1a1a1a; margin: 0 0 4px 0;\"\u003eUp to 3.5 dBi\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555; margin: 0;\"\u003eAt optimum DX angle, best combined-height configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #DDD8CC; border-top: 3px solid #B8960C; padding: 18px;\"\u003e\n\u003cp style=\"font-size: 12px; font-weight: bold; color: #b8960c; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 6px 0;\"\u003eInstallation\u003c\/p\u003e\n\u003cp style=\"font-size: 20px; font-weight: bold; color: #1a1a1a; margin: 0 0 4px 0;\"\u003eMinutes\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555; margin: 0;\"\u003eInstall whip into top cap. Hand-tight. Done.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003cp style=\"font-size: 11px; text-transform: uppercase; letter-spacing: 2.5px; color: #b8960c; font-weight: bold; margin: 0 0 8px 0;\"\u003eThe Physics\u003c\/p\u003e\n\u003ch3 style=\"font-size: 19px; font-weight: bold; color: #1a1a1a; margin: 0 0 10px 0;\"\u003eWhy 9 More Feet Matters\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; color: #555; line-height: 1.65; margin: 0 0 12px 0;\"\u003eFor a vertical antenna, the 5\/8λ point is peak gain — up to 3.5 dBi over isotropic at the optimum DX radiation angle. Below 5\/8λ, gain is building. Above it, the pattern begins to rise in angle and the gain advantage diminishes. Adding 9 feet shifts your entire operating point up the gain curve toward — or to — the 5\/8λ sweet spot on a higher band.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; color: #555; line-height: 1.65; margin: 0 0 12px 0;\"\u003eThe effect is most pronounced on the bands where your combined height is closest to 5\/8λ. On bands where the antenna is already well past 5\/8λ, the whip has less effect — which is why the 28ft model sees diminishing returns from the whip on 15M (already at sweet spot) but meaningful improvement on 20 and 30 meters.\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #888; margin: 0;\"\u003ePhysics foundation: Zavrel W7SX · \u003cem\u003eAntenna Physics: An Introduction\u003c\/em\u003e (ARRL, 2020) · gain figures at optimum angle over average ground.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003cp style=\"font-size: 11px; text-transform: uppercase; letter-spacing: 2.5px; color: #b8960c; font-weight: bold; margin: 0 0 8px 0;\"\u003eW7SX Gain Data\u003c\/p\u003e\n\u003ch3 style=\"font-size: 19px; font-weight: bold; color: #1a1a1a; margin: 0 0 10px 0;\"\u003eWhat the Whip Does to Your Antenna — By Height\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 0 0 12px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1a1a1a; color: #fff;\"\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left;\"\u003eBase + Whip\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left;\"\u003eTotal\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e30M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e20M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e17M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e15M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e12M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: center;\"\u003e10M\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left;\"\u003eNew Sweet Spot\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #fff; border-bottom: 1px solid #DDD8CC;\"\u003e\n\u003ctd style=\"padding: 10px 12px; font-weight: bold; color: #1a1a1a;\"\u003e12 + 9\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; color: #555;\"\u003e21 ft\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e-0.47\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e0.64\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e1.35\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e1.88\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e2.66\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; font-weight: bold; color: #b8960c;\"\u003e3.24\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; font-size: 12px; color: #b8960c; font-weight: bold;\"\u003e5\/8λ 10M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6; border-bottom: 1px solid #DDD8CC;\"\u003e\n\u003ctd style=\"padding: 10px 12px; font-weight: bold; color: #1a1a1a;\"\u003e16 + 9\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; color: #555;\"\u003e25 ft\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e-1.14\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e1.04\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e1.86\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e2.54\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; font-weight: bold; color: #b8960c;\"\u003e3.42\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; font-size: 12px; color: #b8960c; font-weight: bold;\"\u003e5\/8λ 12M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff; border-bottom: 1px solid #DDD8CC;\"\u003e\n\u003ctd style=\"padding: 10px 12px; font-weight: bold; color: #1a1a1a;\"\u003e20 + 9\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; color: #555;\"\u003e29 ft\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e-0.47\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e2.27\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e3.54\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; font-weight: bold; color: #b8960c;\"\u003e2.50\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; font-size: 12px; color: #b8960c; font-weight: bold;\"\u003e5\/8λ 15M — matches 28ft bare\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6; border-bottom: 1px solid #DDD8CC;\"\u003e\n\u003ctd style=\"padding: 10px 12px; font-weight: bold; color: #1a1a1a;\"\u003e24 + 9\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; color: #555;\"\u003e33 ft\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e-0.02\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; font-weight: bold; color: #b8960c;\"\u003e2.27\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; font-weight: bold; color: #b8960c;\"\u003e3.54\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ+\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; font-size: 12px; color: #b8960c; font-weight: bold;\"\u003e5\/8λ 17M + 1\/2λ 20M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff;\"\u003e\n\u003ctd style=\"padding: 10px 12px; font-weight: bold; color: #1a1a1a;\"\u003e28 + 9\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; color: #555;\"\u003e37 ft\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e0.38\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003e2.89\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ+\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\u003eEDZ\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; font-size: 12px; color: #555;\"\u003eLow-band improvement; high bands past sweet spot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; color: #888; margin: 0;\"\u003edBi gain at optimum angle over average ground. Source: W7SX · \u003cem\u003eAntenna Physics: An Introduction\u003c\/em\u003e (ARRL, 2020). EDZ = Extended Double Zepp region — pattern lobing rises above DX-favorable angles. Gold = band sweet spot for that combined height.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 12px 0 0 0;\"\u003eWant your exact numbers? \u003ca style=\"color: #b8960c; text-decoration: underline; border-bottom: none; font-weight: bold;\" href=\"\/pages\/greyline-vda-optimizer\"\u003eRun your base height plus the whip through the VDA Optimizer →\u003c\/a\u003e Confirm where 5\/8λ lands and the modeled gain before you commit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 20px 24px; border-left: 4px solid #B8960C; margin: 0 0 28px 0; max-width: 860px;\"\u003e\n\u003cp style=\"font-size: 12px; font-weight: bold; color: #b8960c; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 10px 0;\"\u003eBest Upgrade in the Lineup\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.7; margin: 0 0 12px 0; color: #e8e6e0;\"\u003eThe 20ft + whip (29ft total) achieves 5\/8λ on 15 meters — matching the 28ft bare antenna. If you own a 20ft and want flagship 15M performance without replacing the antenna, this is the answer.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.7; margin: 0; color: #e8e6e0;\"\u003eThe 24ft + whip (33ft total) hits 5\/8λ on 17M while simultaneously at 1\/2λ on 20M. That's the Founder's home station configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #f7f4ec; border-top: 3px solid #B8960C; padding: 22px 24px; margin: 0 0 28px 0; max-width: 860px;\"\u003e\n\u003cp style=\"font-family: 'Courier New',Courier,monospace; font-size: 11px; letter-spacing: 2.5px; text-transform: uppercase; color: #B8960C; font-weight: bold; margin: 0 0 10px 0;\"\u003eThe Other End of the Same System\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; color: #555; line-height: 1.65; margin: 0 0 12px 0;\"\u003eThe whip goes on top and buys aperture. The \u003cstrong style=\"color:#1a1a1a;\"\u003eTilt-Up Base\u003c\/strong\u003e goes at the bottom and is how one person reaches the top — and lowers it again when weather comes. Two ends of one system.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; color: #555; line-height: 1.65; margin: 0 0 16px 0;\"\u003eWorth knowing before you order: installing a whip on a standing pole means a ladder and usually a second person. On a pole you can walk down, it takes two minutes with both feet on the ground — and so does every future change you will want to make up there.\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 12px;\"\u003e\n\u003ca href=\"\/products\/tilt-up-base-kit-antenna-mount\" style=\"display: block; text-align: center; background: #B8960C; color: #fff; padding: 11px 16px; font-size: 12px; font-weight: bold; text-transform: uppercase; letter-spacing: 1px; text-decoration: none;\"\u003eTilt-Up Base Kit →\u003c\/a\u003e \u003ca href=\"\/products\/4-extension-kit-dx-flagpole-vertical-antenna\" style=\"display: block; text-align: center; background: #fff; color: #1a1a1a; border: 1px solid #DDD8CC; padding: 11px 16px; font-size: 12px; font-weight: bold; text-transform: uppercase; letter-spacing: 1px; text-decoration: none;\"\u003e4' Extension Kit →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #f9f8f6; border: 1px solid #DDD8CC; border-left: 4px solid #B8960C; padding: 16px 20px; max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003cp style=\"font-size: 13px; font-weight: bold; color: #1a1a1a; margin: 0 0 6px 0;\"\u003eFrom the Founder\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 0 0 8px 0;\"\u003e\"I run a 33-foot at home — a 24-foot flagpole plus the 9-foot whip — and work Africa and Asia regularly on 10 through 30 meters, strong multiband performance with peak gain in the 17 to 20 meter range. I notice it there. Go as tall as your lot allows — the multiband improvement is real.\"\u003c\/p\u003e\n\u003cp style=\"font-size: 12px; color: #888; margin: 0;\"\u003e— Jon Kimball KL2A · Founder, Greyline Performance\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003cp style=\"font-size: 11px; text-transform: uppercase; letter-spacing: 2.5px; color: #b8960c; font-weight: bold; margin: 0 0 8px 0;\"\u003eInstallation\u003c\/p\u003e\n\u003ch3 style=\"font-size: 19px; font-weight: bold; color: #1a1a1a; margin: 0 0 10px 0;\"\u003eTwo Minutes. No Tools.\u003c\/h3\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 16px;\"\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #DDD8CC; border-left: 4px solid #B8960C; padding: 16px;\"\u003e\n\u003cp style=\"font-size: 13px; font-weight: bold; color: #1a1a1a; margin: 0 0 6px 0;\"\u003eInstall\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 0;\"\u003eRemove the existing top cap from your antenna. Thread the whip into it. Hand-tight. The ATU will automatically re-tune on first use — it detects the new configuration and updates its memory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #fff; border: 1px solid #DDD8CC; border-left: 4px solid #B8960C; padding: 16px;\"\u003e\n\u003cp style=\"font-size: 13px; font-weight: bold; color: #1a1a1a; margin: 0 0 6px 0;\"\u003eAfter Installation\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 0;\"\u003eIf using an LDG remote ATU: reset the tuner memory on each band for the first tune. The new aperture means new impedance profiles — the tuner needs one pass per band to learn the configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003cp style=\"font-size: 11px; text-transform: uppercase; letter-spacing: 2.5px; color: #b8960c; font-weight: bold; margin: 0 0 8px 0;\"\u003eSpecs\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #1a1a1a; color: #fff;\"\u003e\n\u003cth style=\"padding: 10px 14px; text-align: left;\"\u003eSpec\u003c\/th\u003e\n\u003cth style=\"padding: 10px 14px; text-align: left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6;\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003e9 ft nominal — adjustable 3 ft to 11.5 ft for precise 5\/8λ tuning to your combined height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eAll DXF and DXV models — 12, 16, 20, 24, 28 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6;\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eAluminum — lightweight, corrosion resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eUses existing top cap — no modification required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6;\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003ePeak Modeled Gain\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eUp to 3.5 dBi at optimum angle over average ground\u003cbr\u003e(height dependent — see gain table)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eShipping\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eFree — USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6;\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eMade In\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eSun Valley, Idaho — USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; max-width: 860px; margin: 0 0 28px 0;\"\u003e\n\u003ca href=\"\/collections\/hoa-flagpole-antenna\" style=\"display: block; text-align: center; background: #B8960C; color: #fff; padding: 11px 16px; font-size: 12px; font-weight: bold; text-transform: uppercase; letter-spacing: 1px; text-decoration: none;\"\u003eShop DXF Flagpoles →\u003c\/a\u003e \u003ca href=\"\/collections\/vertical-antenna\" style=\"display: block; text-align: center; background: #fff; color: #1a1a1a; border: 1px solid #DDD8CC; padding: 11px 16px; font-size: 12px; font-weight: bold; text-transform: uppercase; letter-spacing: 1px; text-decoration: none;\"\u003eShop DXV Verticals →\u003c\/a\u003e \u003ca href=\"\/pages\/technical-performance-comparisons\" style=\"display: block; text-align: center; background: #fff; color: #1a1a1a; border: 1px solid #DDD8CC; padding: 11px 16px; font-size: 12px; font-weight: bold; text-transform: uppercase; letter-spacing: 1px; text-decoration: none;\"\u003ePhysics \u0026amp; Gain Data →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 32px 0; padding: 24px 28px; background: #fafaf7; border-left: 3px solid #B8960C; font-family: Georgia, 'Times New Roman', serif; font-size: 15px; line-height: 1.7; color: #2a2a2a;\"\u003e\n\u003cdiv style=\"color: #b8960c; font-size: 11px; letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 10px;\"\u003eWhy this antenna works\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 12px 0;\"\u003eEvery Greyline design decision traces back to named, published antenna physics — Zavrel W7SX, Kraus W8JK, Severns N6LF on ground systems, Maxwell W2DU on transmission lines, Lewallen W7EL on modeling. Not opinions. Cited works.\u003c\/p\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003ca style=\"color: #8b6f0a; text-decoration: none; border-bottom: 1px dotted #B8960C; font-weight: bold;\" href=\"\/pages\/authority-sources\"\u003eRead the full shelf →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top: 1px solid #DDD8CC; padding-top: 16px; margin: 0 0 8px 0; max-width: 860px;\"\u003e\n\u003cp style=\"font-size: 13px; color: #888; font-style: italic; margin: 0;\"\u003eHam Radio is fun again! Pass it on... 73, The Greyline Performance Team · Sun Valley, Idaho · 435-200-4902\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Greyline Performance Antennas","offers":[{"title":"Default Title","offer_id":49138508988693,"sku":null,"price":195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/9footWhip_bf12c79f-55f8-49ba-a89f-162a1a2d55ff.png?v=1784397050"},{"product_id":"tilt-up-base-kit-antenna-mount","title":"Tilt-Up Base Kit for HOA Flagpole and DX Vertical Antennas","description":"\u003cdiv style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#555;font-size:16px;line-height:1.7;\"\u003e\n\n    \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 8px 0;\"\u003eSun Valley Machined\u003c\/p\u003e\n\n    \u003ch2 style=\"color:#1a1a1a;font-size:24px;font-weight:bold;margin:0 0 16px 0;\"\u003eRaise and lower your antenna alone, in minutes.\u003c\/h2\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 20px 0;\"\u003eThe Tilt-Up Base is the hinge your Greyline has been waiting for: walk the antenna down for a whip swap, a season check, or a storm night — and walk it back up — one operator, no ladder, no helper, no lift truck.\u003c\/p\u003e\n\n    \u003cp style=\"display:inline-block;font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#B8960C;font-weight:bold;border:1px solid #B8960C;padding:5px 12px;margin:0 0 10px 0;\"\u003eWatch It Work · 14 Seconds\u003c\/p\u003e\n\n    \u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;margin:0 0 8px 0;\"\u003e\n        \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/maFU_DfyiyY\" title=\"14 seconds: N3EQF raises a 24 ft Greyline DX Flagpole antenna by himself on the Tilt-Up Base\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\n    \u003c\/div\u003e\n    \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:12px;color:#888;margin:0 0 12px 0;\"\u003eThat is the entire job, start to finish. Tom, N3EQF, raises his DXF-24 alone. No narration, no music, no edit — one person, one bolt. Shorter than reading this page.\u003c\/p\u003e\n\n    \u003cdiv style=\"background:#fffdf5;border:1px solid #B8960C;padding:14px 18px;margin:0 0 20px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 8px 0;\"\u003eOne Note On The Video\u003c\/p\u003e\n        \u003cp style=\"color:#555;font-size:15px;line-height:1.6;margin:0;\"\u003eThis clip shows an earlier version of the base, which let you take out either of the top two bolts. \u003cstrong style=\"color:#1a1a1a;\"\u003eThe current version tilts on the top bolt only: loosen the top bolt and remove the SECOND bolt down.\u003c\/strong\u003e Pull the wrong one and it simply will not go over. A new video is on the list. Thanks to Bart, N1BRL, for catching the difference before anyone else had to.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#1a1a1a;border-left:4px solid #B8960C;padding:20px 24px;margin:0 0 20px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 10px 0;\"\u003eField Report — The Operator In The Video\u003c\/p\u003e\n        \u003cp style=\"color:#e8e8e8;margin:0 0 10px 0;font-style:italic;\"\u003e\"Living in Florida, prepping for high winds and hurricanes isn't uncommon. Now that I have the tilt-up base installed for my DXF-24 flagpole, that preparation just got so much easier. Remove one bolt, loosen the other, and the antenna comes down easily and goes back up just as easy. It's now a one person job. Besides storm prep, it makes any preventative maintenance less of a chore. Like the Greyline antenna hardware, the tilt-up base is beautiful. Added bonus; the flagpole just got a little taller!\"\u003c\/p\u003e\n        \u003cp style=\"color:#aaa;font-size:13px;margin:0;\"\u003e— Thomas, N3EQF · Florida · 24 ft DX Flagpole · Verified Owner\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 20px 0;\"\u003e\n        \u003cstrong style=\"color:#1a1a1a;\"\u003eWhy a tilt base?\u003c\/strong\u003e\n         A 24-foot antenna weighs under 30 pounds, but physics does not care — it is the fulcrum, not the weight. Standing one up by hand is a two-person job at best and an awkward one at worst. This is the mechanism that removes the problem, engineered in our Idaho shop specifically for the Greyline base tube.\n    \u003c\/p\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 12px 0;\"\u003eThe Design\u003c\/p\u003e\n        \u003cul style=\"color:#555;margin:0;padding-left:20px;\"\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eTwo precision sleeves interface with the standard Greyline 2\" OD base tube — the tube itself stabilizes the pivot plates\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eHeavy-wall sleeves, thick side plates, and \u003cstrong style=\"color:#1a1a1a;\"\u003eGrade 8 pivot hardware\u003c\/strong\u003e — the engineering math only calls for Grade 5, and our shop builds it with Grade 8 anyway\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eAll-bolted assembly — no welds, fully serviceable with basic tools\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eAdds better than a foot of height to your installation — a small aperture bonus, on the house\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:0;\"\u003eCut, drilled, tapped, and turned in our Sun Valley, Idaho shop\u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#1a1a1a;border-left:4px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"color:#e8e8e8;font-weight:bold;margin:0 0 8px 0;\"\u003eOne direction only. It cannot go over center.\u003c\/p\u003e\n        \u003cp style=\"color:#e8e8e8;margin:0;\"\u003eThe pivot is mitered so the antenna swings down one way and stops dead in the upright position. It cannot tilt past vertical and fall the other way on you. Simple, mechanical, foolproof — and the reason you pick your lay-down lane before you pour.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 12px 0;\"\u003eWhere It Goes — Ground Upward\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 14px 0;\"\u003eThe simplest way to think about it: \u003cstrong style=\"color:#1a1a1a;\"\u003ethe tilt mount inserts between your ground sleeve kit and your lower insulator.\u003c\/strong\u003e Nothing else about your installation changes.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e1. PVC ground sleeve.\u003c\/strong\u003e Set in the ground, the same sleeve your antenna uses today. If a Greyline is already standing in your yard, this step is done.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e2. Aluminum base section.\u003c\/strong\u003e The 3-foot aluminum tube from your ground sleeve kit slips down into the PVC sleeve, with a length of it standing above grade. There is no separate tube to buy and none is missing from your box.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e3. Tilt base.\u003c\/strong\u003e Separate the joint between that aluminum tube and the lower slotted fiberglass, and the tilt base goes in between. Its lower end is a splice that \u003cstrong style=\"color:#1a1a1a;\"\u003eslips down INTO the aluminum tube\u003c\/strong\u003e — it does not go over the outside of it. It only fits one way round, so you cannot install it upside down.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 16px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e4. Lower insulator and the antenna.\u003c\/strong\u003e Everything that normally sits on your ground sleeve kit now sits on the tilt base instead, starting with the lower insulator.\u003c\/p\u003e\n        \u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/Greyline_Tilt_Base_Assembly.jpg?v=1787756995\" alt=\"Greyline Tilt-Up Base assembly drawing showing the PVC ground sleeve at ground level with the tilt mount positioned above it, and dimensions identifying the top and bottom ends of the base\" style=\"width:100%;height:auto;border:1px solid #DDD8CC;\"\u003e\u003c\/p\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:12px;color:#888;margin:0;\"\u003eGround sleeve at grade, tilt mount above it. If you are ever unsure which end is which, the drawing settles it.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 10px 0;\"\u003eThis Product Is Still Being Built\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 12px 0;\"\u003eEverything on this page has been shaped by operators. The bolt note above the video exists because a customer read three of our documents and noticed they disagreed with each other. This assembly drawing exists because two more people got stuck on the same step in the same week, and our engineer drew it that afternoon. The maintenance advice further down came from a 77-year-old in a windy county who mentioned it in passing.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003eWe build these by hand, in small batches, through this season. That is slower than the alternative and it is deliberate: a good field report can change the next run rather than waiting years for a redesign. \u003cstrong style=\"color:#1a1a1a;\"\u003eIf something on your install does not match what you read here, tell us.\u003c\/strong\u003e That is not a complaint. That is how the next one gets better, and you will find your callsign on the page when it does.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 12px 0;\"\u003eLowering It, Every Time After\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eLoosen the top bolt. Remove the SECOND bolt down.\u003c\/strong\u003e The bottom two may want loosening as well. Then walk it over — hand over hand, facing the pole, letting the geometry carry the weight rather than your back. Raising is the same motion in reverse.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003eThe top bolt is the fulcrum and it stays in. If the pole will not go over, you have almost certainly taken out the top one instead of the second.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003eOne person, start to finish. That is the whole design, and the video above is an operator doing exactly that with nobody else in the yard. Bring a second pair of hands if you like the company — plenty of operators do — but the job does not require them, and nobody is climbing anything either way.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#1a1a1a;border-left:4px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 10px 0;\"\u003eField Report — Seventy-Seven Years Old\u003c\/p\u003e\n        \u003cp style=\"color:#e8e8e8;margin:0 0 10px 0;font-style:italic;\"\u003e\"I purchased the tilt-up base to make it easier to maintain the flagpole. I am 77 years old and I have no trouble raising and lowering the antenna by myself. While I had the flagpole down I put lock washers and thread locker on all of the screws. We have enough wind here that over time some of the screws would loosen.\"\u003c\/p\u003e\n        \u003cp style=\"color:#aaa;font-size:13px;margin:0;\"\u003e— Denney, W7MNE · DXF-24 with the 9 ft whip · Verified Owner\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 20px 0;\"\u003eDenney is describing the real return on this base. Wind works fasteners loose over seasons — thousands of small vibration cycles, the same as any bolted structure outdoors. The operator with a ladder finds loose hardware when something fails. The operator with a tilt base walks the pole down on a calm afternoon, works at chest height, adds lock washers and thread locker, and walks it back up. That is the difference between maintenance and repair. \u003ca href=\"\/blogs\/the-signal-report\/w7mne-kept-his-flag-light\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eRead Denney's full story →\u003c\/a\u003e\u003c\/p\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 8px 0;\"\u003eSame Hole. Same Sleeve. No New Digging.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003eAlready have a Greyline standing? The Tilt-Up Base seats in the \u003cstrong style=\"color:#1a1a1a;\"\u003esame ground sleeve your antenna is in today\u003c\/strong\u003e — it fits the standard Greyline Ground Sleeve Kit. The hole you dug once is the only hole you will ever need. No second hole, no new concrete.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 10px 0;\"\u003eInstalling New? Two Decisions Before The Concrete Cures\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 12px 0;\"\u003eIf your antenna is still in the box, you are in the best possible position: set the ground sleeve once, per the standard assembly documents, and the tilt base drops straight into it. Nothing about your ground work changes. Two things are worth deciding before the concrete sets, because they are easy now and awkward later.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 12px 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e1. Pick your lay-down direction.\u003c\/strong\u003e The base tilts one way only. Look at where the antenna will lie flat when it comes down — clear of the house, the fence, the driveway, the neighbor's hedge — and orient the base that way when you set it. An operator who skips this step finds out on the first storm night.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e2. Account for the extra height.\u003c\/strong\u003e The base lifts the whole antenna, so plan your flag clearance, fence line, or eave gap with that in mind. It is free aperture, and it is easier to plan for than to discover.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 8px 0;\"\u003eEvery Greyline Ever Built Can Take One\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0 0 10px 0;\"\u003eWe designed it that way on purpose. This base fits the standard \u003cstrong style=\"color:#1a1a1a;\"\u003e2\" OD\u003c\/strong\u003e tube used across the current 12 to 28 ft line and every Skyline.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eOwn one of the original 28-footers?\u003c\/strong\u003e Those used a 2.25\" pole, and we build a matching base in that size in small batches. Call \u003ca href=\"tel:+14352004902\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003e435-200-4902\u003c\/a\u003e or email us to get on the current run. Nobody gets left out.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 12px 0;\"\u003e\n        \u003cstrong style=\"color:#1a1a1a;\"\u003eNot just for storms.\u003c\/strong\u003e\n         The same base that lowers an antenna ahead of weather is what lets you service a feedpoint, add the \u003ca href=\"\/products\/9-foot-whip-for-greyline-antennas\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003e9 ft DX Whip\u003c\/a\u003e, or check a connector on an ordinary Saturday. Operators who own a tilt base tend to end up with more aperture too, for exactly that reason: the easiest time to add height is when the pole is already horizontal. Want the whole feed side explained end to end? \u003ca href=\"\/pages\/rf-system\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eYour RF System, End To End →\u003c\/a\u003e\n    \u003c\/p\u003e\n\n    \u003cdiv style=\"border:1.5px solid #B8960C;border-radius:4px;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"color:#1a1a1a;font-weight:bold;margin:0 0 6px 0;\"\u003eBuilt in-house in small batches, in Sun Valley, Idaho.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003e\n            Questions on your install, or unsure which size fits your pole? Call\n            \u003ca href=\"tel:+14352004902\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003e435-200-4902\u003c\/a\u003e\n             with your model and year — an operator answers, and we will tell you in thirty seconds.\n        \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"font-family:'Courier New',Courier,monospace;color:#1a1a1a;font-weight:bold;margin:0;\"\u003eHam Radio is fun again! Pass it on... 73\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50017005338901,"sku":"GL-TILT2","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/Capture-2.jpg?v=1783446402"},{"product_id":"deck-concrete-tilt-mount-antenna-base","title":"Deck or Concrete Mount | Tilt Base No Dig for HOA Flagpole and DX Vertical Antennas","description":"\u003cdiv style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#555;font-size:16px;line-height:1.7;\"\u003e\n\n    \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 8px 0;\"\u003eSun Valley Built — First Production Run\u003c\/p\u003e\n\n    \u003ch2 style=\"color:#1a1a1a;font-size:24px;font-weight:bold;margin:0 0 16px 0;\"\u003eAll the tilt, no digging.\u003c\/h2\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 16px 0;\"\u003eThe Deck \u0026amp; Concrete Mount Tilt Base takes our Tilt-Up Base and bolts it flat to the surface you already have: a concrete footing, a deck, a patio, a rooftop pad. Same one-operator raise-and-lower. Same locked upright stop. No ground sleeve required.\u003c\/p\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 24px 0;\"\u003e\n        \u003cstrong style=\"color:#1a1a1a;\"\u003eWho this is for:\u003c\/strong\u003e\n         the operator whose best antenna spot is not diggable — rooftop installs, existing slabs, engineered decks, rocky ground, and rentals where a poured sleeve is not an option. The Greyline vertical dipole already works on any surface a flag-rated pole can stand on; this base is how it stands there.\n    \u003c\/p\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 12px 0;\"\u003eThe Design, Plainly\u003c\/p\u003e\n        \u003cul style=\"color:#555;margin:0;padding-left:20px;\"\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eWelded steel anchor plate with four-bolt hold-down pattern — bolts to concrete or structural deck framing\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eGusseted upright carries the same tilt assembly as our Tilt-Up Base Kit\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003e1\/4\" side plates, 3\/8\" Grade 5 pivot hardware on the tilt assembly\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eInterfaces with the standard Greyline 2\" OD x .125\" wall base tube\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:8px;\"\u003eAdds 17\" of height to your installation\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:0;\"\u003eBuilt in our Sun Valley, Idaho shop\u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#1a1a1a;border-left:4px solid #B8960C;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"color:#e8e8e8;font-weight:bold;margin:0 0 8px 0;\"\u003eThe 45-degree stop.\u003c\/p\u003e\n        \u003cp style=\"color:#e8e8e8;margin:0;\"\u003eThe antenna swings down one way only and stops dead upright — it cannot tilt over the top. Simple, mechanical, foolproof.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 24px 0;\"\u003e\n        \u003cstrong style=\"color:#1a1a1a;\"\u003eFits:\u003c\/strong\u003e\n         Greyline DXF and DXV antennas built on the standard 2\" OD base tube. Larger-diameter base models: a larger receiver is in development — call before ordering: 435-200-4902.\n    \u003c\/p\u003e\n\n    \u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;border-radius:4px;padding:24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"font-family:'Courier New',Courier,monospace;font-size:11px;letter-spacing:2.5px;text-transform:uppercase;color:#B8960C;font-weight:bold;margin:0 0 12px 0;\"\u003eMounting Dimensions — Will It Fit Your Existing Bolts?\u003c\/p\u003e\n        \u003csvg viewbox=\"0 0 320 310\" width=\"100%\" style=\"max-width:320px;display:block;margin:0 auto 14px;\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\n            \u003crect x=\"40\" y=\"60\" width=\"220\" height=\"220\" fill=\"#f9f8f6\" stroke=\"#1a1a1a\" stroke-width=\"2\"\u003e\u003c\/rect\u003e\n            \u003ccircle cx=\"74.4\" cy=\"94.4\" r=\"10\" fill=\"#fff\" stroke=\"#B8960C\" stroke-width=\"2\"\u003e\u003c\/circle\u003e\n            \u003ccircle cx=\"225.6\" cy=\"94.4\" r=\"10\" fill=\"#fff\" stroke=\"#B8960C\" stroke-width=\"2\"\u003e\u003c\/circle\u003e\n            \u003ccircle cx=\"74.4\" cy=\"245.6\" r=\"10\" fill=\"#fff\" stroke=\"#B8960C\" stroke-width=\"2\"\u003e\u003c\/circle\u003e\n            \u003ccircle cx=\"225.6\" cy=\"245.6\" r=\"10\" fill=\"#fff\" stroke=\"#B8960C\" stroke-width=\"2\"\u003e\u003c\/circle\u003e\n            \u003cline x1=\"40\" y1=\"44\" x2=\"260\" y2=\"44\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003cline x1=\"40\" y1=\"38\" x2=\"40\" y2=\"50\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003cline x1=\"260\" y1=\"38\" x2=\"260\" y2=\"50\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003ctext x=\"150\" y=\"34\" text-anchor=\"middle\" font-family=\"Courier New,Courier,monospace\" font-size=\"13\" font-weight=\"bold\" fill=\"#1a1a1a\"\u003e8.00\"\u003c\/text\u003e\n            \u003cline x1=\"74.4\" y1=\"296\" x2=\"225.6\" y2=\"296\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003cline x1=\"74.4\" y1=\"290\" x2=\"74.4\" y2=\"302\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003cline x1=\"225.6\" y1=\"290\" x2=\"225.6\" y2=\"302\" stroke=\"#B8960C\" stroke-width=\"1.5\"\u003e\u003c\/line\u003e\n            \u003ctext x=\"150\" y=\"292\" text-anchor=\"middle\" font-family=\"Courier New,Courier,monospace\" font-size=\"13\" font-weight=\"bold\" fill=\"#1a1a1a\"\u003e5.50\" c-c\u003c\/text\u003e\n            \u003ctext x=\"150\" y=\"175\" text-anchor=\"middle\" font-family=\"Courier New,Courier,monospace\" font-size=\"12\" fill=\"#555\"\u003e8\" x 8\" plate\u003c\/text\u003e\n        \u003c\/svg\u003e\n        \u003cul style=\"color:#555;margin:0 0 12px 0;padding-left:20px;\"\u003e\n            \u003cli style=\"margin-bottom:6px;\"\u003e\n\u003cstrong style=\"color:#1a1a1a;\"\u003eBase plate:\u003c\/strong\u003e 8\" x 8\", 3\/8\" steel\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:6px;\"\u003e\n\u003cstrong style=\"color:#1a1a1a;\"\u003eBolt pattern:\u003c\/strong\u003e 5.5\" x 5.5\" square, center-to-center\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:6px;\"\u003e\n\u003cstrong style=\"color:#1a1a1a;\"\u003eAnchor holes:\u003c\/strong\u003e four, 3\/4\" clearance — sized for 5\/8\" anchor rods\u003c\/li\u003e\n            \u003cli style=\"margin-bottom:0;\"\u003e\n\u003cstrong style=\"color:#1a1a1a;\"\u003eHeight added:\u003c\/strong\u003e 17\"\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp style=\"color:#555;margin:0;font-size:14px;\"\u003eMatching existing bolts? Measure center-to-center both directions. 5.5\" x 5.5\" on 5\/8\" rods is a drop-on fit. Different pattern? Call us — custom plates are a conversation, not a problem: \u003cspan style=\"color:#B8960C;font-weight:bold;\"\u003e435-200-4902\u003c\/span\u003e\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"border:1.5px solid #B8960C;border-radius:4px;padding:20px 24px;margin:0 0 24px 0;\"\u003e\n        \u003cp style=\"color:#1a1a1a;font-weight:bold;margin:0 0 6px 0;\"\u003eAnchor hardware note.\u003c\/p\u003e\n        \u003cp style=\"color:#555;margin:0;\"\u003e\n            Concrete anchors and deck fasteners are surface-specific and not included — call us and we will talk through your exact mounting surface before you order. \n            \u003cspan style=\"color:#B8960C;font-weight:bold;\"\u003e435-200-4902\u003c\/span\u003e\n        \u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cp style=\"color:#555;margin:0 0 24px 0;\"\u003e\n        \u003cstrong style=\"color:#1a1a1a;\"\u003eFirst production run.\u003c\/strong\u003e\n         Built in-house in small batches.\n    \u003c\/p\u003e\n\n    \u003cp style=\"font-family:'Courier New',Courier,monospace;color:#1a1a1a;font-weight:bold;margin:0;\"\u003eHam Radio is fun again! Pass it on… 73\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50017011073301,"sku":"GL-TILT2-AP","price":550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/Capture1-1.jpg?v=1783446392"},{"product_id":"xl-tilt-up-base-kit-2-25-legacy-greyline-hf-vertical-antennas","title":"XL Tilt-Up Base Kit | For 2.25\" Legacy Greyline HF Vertical Antennas","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555555;font-size:16px;line-height:1.75;\"\u003e\n\u003cp style=\"font-family:'Courier New',monospace;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#B8960C;font-weight:bold;border:1px solid #B8960C;display:inline-block;padding:4px 10px;margin:0 0 14px;\"\u003eFor The 2.25\" Legacy Antennas\u003c\/p\u003e\n\u003cdiv style=\"background:#1a1a1a;color:#ffffff;border-left:4px solid #B8960C;padding:14px 18px;margin:0 0 14px;\"\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003e\u003cstrong style=\"color:#B8960C;\"\u003eIntroductory price for original owners: $400 through September 10, 2026.\u003c\/strong\u003e Regular price $479 after that. Said out loud so nobody has to guess.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eIf your Greyline HF vertical is from the 2.25-inch era, this is your tilt.\u003c\/strong\u003e The standard Tilt-Up Base is built for the current 2.00-inch antenna line -- machining it to fit a legacy antenna would leave a thinner splice carrying a bigger, higher-wind-load vertical, and we do not build weak links at the bottom of anything. So the bench built the XL: the same one-person tilt-over mechanism as the standard tilt, sized and reinforced for the 2.25 HF vertical from the start -- heavier square tube, heavier bar, longer pivot bolts.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eWatch it work:\u003c\/strong\u003e the fourteen-second video in the photo gallery above shows N3EQF raising his 24-footer alone on the standard Tilt-Up Base. The XL does exactly this for the 2.25.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eWhat it buys you is what every tilt buys: the whole antenna comes down to waist height with one pair of hands -- no ladder, no crew, no waiting for a calm day. Inspect the insulators, run the magnet test, swap hardware, dress the flag, and walk it back up. The fall checkup becomes a ten-minute job on the ground.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eStraight talk:\u003c\/strong\u003e these are hand-built in Sun Valley in small runs, and the first articles are standing in the field now. Your order carries a real build queue, and you will get a real date -- that is how a hand-built shop works.\u003c\/p\u003e\n\u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:14px 18px;margin:0 0 14px;\"\u003e\n\u003cp style=\"font-size:14px;margin:0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe other end of the system:\u003c\/strong\u003e once you can reach the top, the \u003ca href=\"https:\/\/greylineperformance.com\/products\/9-foot-whip-for-greyline-antennas\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003e9' DX Whip\u003c\/a\u003e is what most operators put up there -- added aperture, and 40 and 80 come alive with added dBi gain on the middle bands, up to the 5\/8-wave point the whip is built to. The tilt is how you reach the top; the whip is what goes on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#888888;margin:0;\"\u003eOur guarantee covers the antenna and mounts as we build them. Hand-built in Sun Valley, Idaho. Questions: 435-200-4902 -- an operator answers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50145505968405,"sku":"GL-TILT-XL","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/XL_Tilt-Up_Base_4bcb43c9-4c5e-4b31-b715-134ce2eb055b.jpg?v=1788466612"},{"product_id":"stainless-hardware-kit-60-screws-fits-12-28-greyline-hf-vertical-antennas","title":"Stainless Hardware Kit | 60 Screws, Fits 12'-28' Greyline HF Vertical Antennas","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555555;font-size:16px;line-height:1.75;\"\u003e\n\u003cp style=\"font-family:'Courier New',monospace;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#B8960C;font-weight:bold;border:1px solid #B8960C;display:inline-block;padding:4px 10px;margin:0 0 14px;\"\u003eStainless Hardware\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eSixty 1\/4\"-20 x 1\/2\" button-head stainless screws -- enough to replace every fastener on any Greyline HF vertical antenna from 12 to 28 feet, with spares.\u003c\/strong\u003e 304 stainless, 18-8, fully threaded, 5\/32\" Allen. The same spec that ships on every antenna from our bench.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eWhy the spec matters: hardware-store fasteners are often zinc-plated steel. Plated looks identical to stainless the day it goes on and rusts within a few winters, and a corroded clamp screw is a joint that loosens under load. If you ever replace hardware on the antenna, replace it with stainless. How to tell what you have: 304 stainless is mildly magnetic, so a light pull on a magnet is normal. Plated steel grabs hard -- and it rusts. Rust is the verdict; the magnet is only a hint.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe right way to swap it\u003c\/strong\u003e -- clean the joint, all loose then snug, how tight is tight, and the one never -- is written up in our \u003ca href=\"https:\/\/greylineperformance.com\/pages\/assembly-documents\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eassembly documents\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888888;margin:0;\"\u003eShipping included. Near salt water, choose the 316 marine kit. Hand-bagged in Sun Valley, Idaho. Questions: 435-200-4902 -- an operator answers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50146437431573,"sku":"GL-HW-304-60","price":44.0,"currency_code":"USD","in_stock":true}]},{"product_id":"stainless-hardware-kit-316-marine-60-screws-fits-12-28-greyline-hf-vertical-antennas","title":"Stainless Hardware Kit 316 Marine | 60 Screws, Fits 12'-28' Greyline HF Vertical Antennas","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555555;font-size:16px;line-height:1.75;\"\u003e\n\u003cp style=\"font-family:'Courier New',monospace;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#B8960C;font-weight:bold;border:1px solid #B8960C;display:inline-block;padding:4px 10px;margin:0 0 14px;\"\u003eStainless Hardware -- Salt Water\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eSixty 1\/4\"-20 x 1\/2\" button-head screws in 316 marine stainless -- for antennas within reach of salt air.\u003c\/strong\u003e Every fastener on any Greyline HF vertical antenna from 12 to 28 feet, with spares. Fully threaded, 5\/32\" Allen. 316 carries molybdenum that 304 does not, and it is the difference between a fastener that shrugs off ocean spray and one that pits in five years.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eIf you ever replace hardware on the antenna, replace it with stainless -- and within reach of the ocean, with 316. How to tell what you have: stainless is mildly magnetic, so a light pull on a magnet is normal. Plated steel grabs hard -- and it rusts. Rust is the verdict; the magnet is only a hint.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe right way to swap it\u003c\/strong\u003e is written up in our \u003ca href=\"https:\/\/greylineperformance.com\/pages\/assembly-documents\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eassembly documents\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888888;margin:0;\"\u003eShipping included. Hand-bagged in Sun Valley, Idaho. Questions: 435-200-4902 -- an operator answers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50146437529877,"sku":"GL-HW-316-60","price":59.0,"currency_code":"USD","in_stock":true}]},{"product_id":"lower-section-hardware-kit-16-stainless-screws-for-greyline-hf-vertical-antennas","title":"Lower Section Hardware Kit | 16 Stainless Screws for Greyline HF Vertical Antennas","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555555;font-size:16px;line-height:1.75;\"\u003e\n\u003cp style=\"font-family:'Courier New',monospace;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#B8960C;font-weight:bold;border:1px solid #B8960C;display:inline-block;padding:4px 10px;margin:0 0 14px;\"\u003eStainless Hardware\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eSixteen 1\/4\"-20 x 1\/2\" button-head stainless screws -- the two lowest joints of a Greyline HF vertical antenna, where wind works hardware loose first.\u003c\/strong\u003e 304 stainless, 18-8, fully threaded, 5\/32\" Allen. The lower sections carry the whole antenna's bending load in every gust, and a season of vibration is a season of loosening; this is the small kit for the operator who found a loose or missing screw at the base and wants the joints right before winter.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eDoing the whole antenna? The 60-screw full kit covers every joint. Replacing an insulator? The Base Section Kit carries the insulators and their helicoils. And if you replace hardware with anything, replace it with stainless. How to tell what you have: 304 stainless is mildly magnetic, so a light pull is normal; plated steel grabs hard, and it rusts. Rust is the verdict.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe right way to swap it\u003c\/strong\u003e is written up in our \u003ca href=\"https:\/\/greylineperformance.com\/pages\/assembly-documents\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eassembly documents\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888888;margin:0;\"\u003eShipping included. Hand-bagged in Sun Valley, Idaho. Questions: 435-200-4902 -- an operator answers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50146437660949,"sku":"GL-HW-304-16","price":29.0,"currency_code":"USD","in_stock":true}]},{"product_id":"tilt-up-base-hardware-kit-stainless-pivot-bolts-nuts-washers-screws","title":"Tilt-Up Base Hardware Kit | Stainless Pivot Bolts, Nuts, Washers, Screws","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555555;font-size:16px;line-height:1.75;\"\u003e\n\u003cp style=\"font-family:'Courier New',monospace;font-size:11px;text-transform:uppercase;letter-spacing:2px;color:#B8960C;font-weight:bold;border:1px solid #B8960C;display:inline-block;padding:4px 10px;margin:0 0 14px;\"\u003eStainless Hardware -- Tilt Base\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe complete hardware set for the Greyline Tilt-Up Base: four 3\/8\"-16 x 3.25\" pivot bolts, four nuts, eight washers, and eight 1\/4\"-20 screws -- in stainless.\u003c\/strong\u003e The pivot is the one joint on the antenna that moves by design, and it lives at ground level where moisture collects. Plated hardware there is on a short clock; stainless ends it.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eCheck the rest of your hardware while you are down there. Stainless is mildly magnetic, so a light pull on a magnet is normal; plated steel grabs hard, and it rusts. Rust is the verdict. Replace with stainless, always.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe right way to swap it\u003c\/strong\u003e -- pivot bolts last, antenna supported -- is written up in our \u003ca href=\"https:\/\/greylineperformance.com\/pages\/assembly-documents\" style=\"color:#B8960C;font-weight:bold;text-decoration:none;\"\u003eassembly documents\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888888;margin:0;\"\u003eShipping included. Hand-bagged in Sun Valley, Idaho. Questions: 435-200-4902 -- an operator answers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50146437693717,"sku":"GL-HW-TILT","price":54.0,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/collections\/XL-Tilt-vs-Tilt-Mount.jpg?v=1788480656","url":"https:\/\/greylineperformance.com\/collections\/accessories-hardware.oembed","provider":"Greyline Performance Antennas","version":"1.0","type":"link"}