{"title":"28' HD Heavy-Duty Series — Built for Wind","description":"\u003cdiv style=\"max-width:860px;font-family:Arial,Helvetica,sans-serif;color:#555;line-height:1.65;\"\u003e\n\u003cp style=\"font-size:11px;text-transform:uppercase;letter-spacing:2.5px;color:#b8960c;font-weight:bold;margin:0 0 8px;\"\u003eHeavy-Duty 3-Inch Base · 160-6M · No Radials · Made in USA\u003c\/p\u003e\n\u003cp style=\"font-size:16px;margin:0 0 12px;\"\u003eFor hurricane country, coastline, ridgelines, high plains and northern winters: the places where wind is the design problem. Same Greyline signal on every band, 160 through 6, on a heavy-duty 3-inch base.\u003c\/p\u003e\n\u003cp style=\"font-size:15px;margin:0 0 6px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eThe HD system, three pieces:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size:15px;margin:0 0 4px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e1. The antenna.\u003c\/strong\u003e The 28' HD DX Flagpole flies a full-size flag; the 28' HD DX Vertical is the same antenna without the flag hardware.\u003c\/p\u003e\n\u003cp style=\"font-size:15px;margin:0 0 4px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e2. The 3\" HD Tilt-Up Base.\u003c\/strong\u003e Built for the heavier pole, so you can walk it down ahead of a big storm and back up after. $25 off with either HD.\u003c\/p\u003e\n\u003cp style=\"font-size:15px;margin:0 0 12px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e3. The 9' DX Whip.\u003c\/strong\u003e On the HD DX Vertical it makes 37 feet on a heavy-duty base. $25 off with an antenna.\u003c\/p\u003e\n\u003cp style=\"font-size:14px;margin:0;\"\u003eBuilt to order, ships in 1 to 2 weeks, free to the USA and Canada. Certified wind ratings are published with the final engineering. Questions? Call 435-200-4902.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"9-foot-whip-for-greyline-antennas","title":"9' DX Whip — More Aperture on Every Band | 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 · Fits Any 2\" Pole\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;\"\u003eEvery Band Benefits\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.\u003c\/h3\u003e\n\u003cp style=\"color: #1a1a1a; font-family: Georgia,serif; font-size: 16px; line-height: 1.7; margin: 0 0 16px 0;\"\u003eThe 9' DX Whip extends the upper radiator on any Greyline VDA. Your antenna still works every band, 160 through 6 — now with more aperture. Length pays most on 40, 80, and 160, where every backyard vertical is electrically short, and it moves the bonus gain down the dial, toward 17 and 20 meters.\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'. In NEC modeling over average ground, the whip on a 28-footer (the Skyline 37) reaches about +4 dBi on 17 meters at the optimum DX angle — but that bonus is one detail in a broader story. The whip's real job is to give every band on the antenna a longer radiator.\u003c\/p\u003e\n\u003ca style=\"color: #b8960c; text-decoration: underline; border-bottom: none;\" href=\"\/pages\/what-height-hf-vertical-antenna\" target=\"_blank\" rel=\"noopener\"\u003eHow height and aperture pay →\u003c\/a\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 18px 22px; border-left: 4px solid #B8960C; margin: 16px 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 — Greyline Or Not\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 8px 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; every Greyline already carries the top truck the whip seats in.\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 15px; line-height: 1.6; color: #e8e6e0;\"\u003eNot a Greyline? The whip seats in a flag truck that caps \u003cstrong style=\"color:#fff;\"\u003eany 2-inch OD pole\u003c\/strong\u003e; call and we will set you up with a 2-inch truck or our Topper. On another maker's 2-inch vertical fed at the base through a tuner, it does the same physics. One caution: nine more feet changes the electrical length, so a resonant trap vertical may not be happy — call first. \u003ca href=\"\/pages\/fits-other-antennas\" style=\"color:#b8960c;font-weight:bold;\"\u003eWill it fit my antenna? →\u003c\/a\u003e\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;\"\u003eMore signal down low; the bonus moves down the bands.\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;\"\u003eModeled Bonus\u003c\/p\u003e\n\u003cp style=\"font-size: 20px; font-weight: bold; color: #1a1a1a; margin: 0 0 4px 0;\"\u003eUp to ~4 dBi\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555; margin: 0;\"\u003e17M on the Skyline 37, NEC modeling over average ground.\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;\"\u003eHeight is aperture. On 40 and 80, where every Greyline is electrically short, the whip adds radiator exactly where it counts most. Higher up the dial, gain builds as the combined length grows toward the band's best geometry, and past it the pattern begins to break into lobes — so the whip moves the antenna's strongest band down the dial, from 10 meters toward 17.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; color: #555; line-height: 1.65; margin: 0 0 12px 0;\"\u003eThat is the trade: the taller combinations gain strength on 17, 20, 30, and below, and enter a multi-lobe (EDZ) pattern on the top bands — which still work, with the energy spread across angles.\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #888; margin: 0;\"\u003eGain figures: NEC modeling of total height, feedpoint section included, at the optimum angle over average ground. Further reading on the \u003ca href=\"\/pages\/authority-sources\" style=\"color:#b8960c;\"\u003eBookshelf\u003c\/a\u003e.\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;\"\u003eNEC Gain Data (Over Average Ground)\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;\"\u003e40M\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;\"\u003eStrongest\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-1.63\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;\"\u003e10M\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;\"\u003e12M\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; font-weight: bold; color: #b8960c;\"\u003e3.54\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 12px; text-align: center; color: #555;\"\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;\"\u003e17M · Skyline 29\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; color: #555;\"\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;\"\u003e17M · Skyline 33\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; font-weight: bold; color: #b8960c;\"\u003e3.96\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;\"\u003e17M, pushing toward 20M · Skyline 37\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, NEC modeling of total height, feedpoint section included. *The NEC runs were made at 12, 16, 20, 24, 29, 33, and 37 ft total; the 21 ft and 25 ft rows use the nearest runs (20 ft and 24 ft). EDZ = extended double Zepp region — the pattern turns multi-lobe, and plenty of that energy still lands where DX and regional contacts live. Gold = the strongest band for that combined height.\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 12px 0 0 0;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eHow to read the numbers:\u003c\/strong\u003e 0 dBi is an ideal quarter-wave standing on a full field of buried radials — the antenna almost no small lot can hold. The small minus figures on 40 meters mean within a decibel or two of that ideal, with no radials in your yard; about 1 dB is barely audible, and 3 dB doubles your power. Nothing here to fear. \u003ca style=\"color: #b8960c; text-decoration: underline; border-bottom: none; font-weight: bold;\" href=\"\/pages\/how-to-read-antenna-gain-dbi\" target=\"_blank\" rel=\"noopener\"\u003eHow to read antenna gain →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; color: #555; line-height: 1.65; margin: 12px 0 0 0;\"\u003eWant your exact numbers, including 30 meters? \u003ca style=\"color: #b8960c; text-decoration: underline; border-bottom: none; font-weight: bold;\" href=\"\/pages\/greyline-vda-optimizer\" target=\"_blank\" rel=\"noopener\"\u003eRun your base height plus the whip through the VDA Optimizer →\u003c\/a\u003e\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;\"\u003eWhat Owners Report\u003c\/p\u003e\n\u003ch3 style=\"font-size: 19px; font-weight: bold; color: #1a1a1a; margin: 0 0 12px 0;\"\u003eThree Whips, Three Logbooks\u003c\/h3\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 18px 22px; border-left: 4px solid #B8960C; margin: 0 0 12px 0;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 15px; line-height: 1.65; font-style: italic; color: #e8e6e0;\"\u003e“After 2 weeks of use I can safely say that the 9' whip is a great addition to my 20V. My rough calculations show about a 2+ dB improvement overall. On the receive side the most dramatic indicator is that I am getting approximately the same signal strength without the preamp on most bands. I have also been able to work several new countries that I could not work previously — India, Franz Josef Land, Kazakhstan. It has taken me three years to eliminate my blind spot.”\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #aaa;\"\u003e— Craig, 20 ft DX Vertical with the whip · Verified Owner · October 2026\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 18px 22px; border-left: 4px solid #B8960C; margin: 0 0 12px 0;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 15px; line-height: 1.65; font-style: italic; color: #e8e6e0;\"\u003e“I find that the added 4 feet makes a difference, along with the 9' whip and tilt base. Signals are stronger on receive, and my transmit reach appears to have extended based on signal reports. Still adding many DX contacts to the log!”\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #aaa;\"\u003e— Chris, K1LDO · North Carolina · 24 ft plus extension plus whip · 249 DXCC entities and counting · Verified Owner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #1a1a1a; color: #e8e6e0; padding: 18px 22px; border-left: 4px solid #B8960C; margin: 0 0 12px 0;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 15px; line-height: 1.65; font-style: italic; color: #e8e6e0;\"\u003e“If I had room for the 9' whip on top, I would add that next and probably gain 160 meters. But this current flagpole setup is giving me 80 thru 6 and tons of QSOs. Yes, it's fun again!”\u003c\/p\u003e\n\u003cp style=\"margin: 0; font-size: 13px; color: #aaa;\"\u003e— Tom, N3EQF · Florida HOA · 24 ft DX Flagpole plus extension · Verified Owner\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 13px; color: #888; margin: 0;\"\u003eOwner reports are quoted from verified-purchase reviews. Results vary with height, ground, and the band you are chasing. Your numbers: the \u003ca href=\"\/pages\/greyline-vda-optimizer\" style=\"color:#b8960c;\"\u003eVDA Optimizer\u003c\/a\u003e.\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;\"\u003ePut the whip on a 20-footer and it becomes a Skyline 29, strongest on 17 meters at about +3.5 dBi. On a 24-footer, a Skyline 33 — the same 17-meter bonus at the classic 40-meter quarter-wave height. On a 28-footer, the Skyline 37 carries the most gain of all: about +4.0 dBi on 17, pushing toward 20. Every one of them still works every band.\u003c\/p\u003e\n\u003cp style=\"font-size: 15px; line-height: 1.7; margin: 0; color: #e8e6e0;\"\u003eThe founder runs a whip at home too: 9 to 11.5 feet on top of a 32-foot pole.\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. With any Skyline, the Tilt-Up Base is $50 off automatically.\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. \u003ca href=\"https:\/\/youtu.be\/maFU_DfyiyY\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;\"\u003eFourteen seconds shows the whole job →\u003c\/a\u003e\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\" target=\"_blank\" rel=\"noopener\" 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\" target=\"_blank\" rel=\"noopener\" 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;\"\u003eJon KL2A runs a 32-foot Greyline at home with a 9-to-11.5-foot whip on top, and works Africa and Asia regularly on 10 through 30 meters. When 10 meters opens, he likes the 24-foot. His advice to every buyer is the same: 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 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. An automatic tuner will 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 a remote autotuner such as the LDG: 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. Desk tuners: expect new settings on each band.\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\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 (seats in the top truck every Greyline carries); any other 2\" OD pole with a 2-inch flag truck or the Greyline Topper — call\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;\"\u003eModeled Bonus\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eUp to about 4 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 to the USA and Canada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f8f6;\"\u003e\n\u003ctd style=\"padding: 10px 14px; color: #555;\"\u003eAssembled\u003c\/td\u003e\n\u003ctd style=\"padding: 10px 14px; font-weight: bold;\"\u003eBy hand in the Mountain West\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\" target=\"_blank\" rel=\"noopener\" 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\" target=\"_blank\" rel=\"noopener\" 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\" target=\"_blank\" rel=\"noopener\" 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 published antenna physics — the ARRL Antenna Book, Kraus on antennas, Severns on ground systems, Maxwell on transmission lines, Lewallen 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\" target=\"_blank\" rel=\"noopener\"\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, Jon KL2A · Greyline Performance · 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":"GL-WHIP-9","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-3-in-od-poles-and-masts","title":"3\" HD Tilt-Up Base | For the 28' HD and 3\" OD Poles","description":"\u003cdiv style=\"max-width:860px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#555;line-height:1.65;\"\u003e\n\u003cp style=\"font-size:11px;text-transform:uppercase;letter-spacing:2.5px;color:#b8960c;font-weight:bold;margin:0 0 8px;\"\u003eHeavy-Duty · 3-Inch OD · One-Person Raise and Lower\u003c\/p\u003e\n\u003ch2 style=\"font-size:26px;font-weight:bold;color:#1a1a1a;line-height:1.25;margin:0 0 14px;\"\u003eThe 3\" HD Tilt-Up Base — Walk the Heavy One Down.\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;margin:0 0 14px;\"\u003eBuilt for the 28' HD and any straight 3-inch OD pole. The same idea as our standard Tilt-Up Base, scaled for a heavier antenna: a one-direction pivot that stops dead at vertical, so one person lowers the whole antenna to waist height for maintenance, a whip change, or ahead of a storm — and raises it back the same way.\u003c\/p\u003e\n\u003cdiv style=\"background:#1a1a1a;color:#e8e8e8;padding:18px 22px;border-left:4px solid #B8960C;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eShips in 1-2 Weeks\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;color:#e8e8e8;\"\u003eBuilt alongside the 28' HD and shipped in the same window. Order them together and they go out together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#ffffff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eWatch: 14 Seconds\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003eOne person raises a 24' Greyline alone on the standard Tilt-Up Base. The HD tilt uses the same pivot, scaled for the heavier pole. \u003ca href=\"https:\/\/youtu.be\/maFU_DfyiyY\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eWatch the 14-second raise →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eFits\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 20px;\"\u003eThe Greyline 28' HD, and other antennas, flagpoles or masts with a straight 3.00-inch OD base section. Measure your pole's outside diameter before you order; for the 2-inch Greyline line use the standard \u003ca href=\"\/products\/tilt-up-base-kit-antenna-mount\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eTilt-Up Base\u003c\/a\u003e, and for early 2.25-inch Greylines the \u003ca href=\"\/products\/xl-tilt-up-base-kit-2-25-legacy-greyline-hf-vertical-antennas\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eXL Tilt\u003c\/a\u003e. With the 28' HD in the cart, the 3\" HD Tilt-Up Base is $25 off automatically.\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:0 0 28px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;width:38%;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e28' HD; any straight 3.00\" OD pole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e6061-T6 aluminum, stainless hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003ePivot\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eOne direction; stops at vertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eShips\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eIn 1-2 weeks; free to the USA and Canada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eHome\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eDesigned and built in the Mountain West · KL2A and HQ in Sun Valley, Idaho\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#888;margin:0 0 16px;\"\u003ePhoto: the standard Tilt-Up Base. HD tilt photos from the bench are coming.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888;font-style:italic;margin:0;\"\u003eHam Radio is fun again! Pass it on… 73, Jon KL2A · Greyline Performance · 435-200-4902\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50085627953429,"sku":"GL-TILT300","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/Capture-2_dda87009-50d7-485d-9c69-9736ea3742fd.jpg?v=1791319033"},{"product_id":"28-hd-heavy-duty-3-inch-greyline-hf-vertical","title":"28' HD — Heavy-Duty 3\" Greyline HF Vertical","description":"\u003cdiv style=\"max-width:860px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#555;line-height:1.65;\"\u003e\n\u003cp style=\"font-size:11px;text-transform:uppercase;letter-spacing:2.5px;color:#b8960c;font-weight:bold;margin:0 0 8px;\"\u003eHeavy-Duty · 3-Inch Base · 160-6M · No Radials · Made in USA\u003c\/p\u003e\n\u003ch2 style=\"font-size:26px;font-weight:bold;color:#1a1a1a;line-height:1.25;margin:0 0 14px;\"\u003eThe 28' HD: The Greyline Built for Wind.\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;margin:0 0 14px;\"\u003eThe same Greyline design, every band 160 through 6 from a single feedpoint with no radials, built on a heavy-duty 3-inch base. For exposed sites, northern winters, open ground, and operators who want the full 28 feet with real margin under it.\u003c\/p\u003e\n\u003cdiv style=\"background:#1a1a1a;color:#e8e8e8;padding:20px 24px;border-left:4px solid #B8960C;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eNow Taking Orders — Ships in 1-2 Weeks\u003c\/p\u003e\n\u003cp style=\"margin:0 0 10px;font-size:16px;color:#ffffff;\"\u003eThe first 28' HD goes to Iceland, to face the winter winds. Anyone watching the weather channel?\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;color:#e8e8e8;\"\u003eThe next builds are right behind it, ready to go. Order now and yours ships in one to two weeks, free to the USA and Canada. Rated well above the standard 28'; the certified ASCE 7-10 numbers are published here with the final engineering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1.5px solid #B8960C;padding:14px 20px;margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eWant it to fly a flag?\u003c\/strong\u003e The HD also comes as a real flagpole, flag kit included: \u003ca href=\"\/products\/28-hd-dx-flagpole-heavy-duty-3-inch\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003e28' HD DX Flagpole →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1.5px solid #B8960C;padding:14px 20px;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003eWant it taller?\u003c\/strong\u003e The HD finishes in the same top sections as every Greyline, so the \u003ca href=\"\/products\/9-foot-whip-for-greyline-antennas\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003e9' DX Whip\u003c\/a\u003e seats right on it: 37 feet of HF vertical on a heavy-duty base, the tallest Greyline we build, with the whip's added length paying most on 40, 80 and 160. The wind rating with the whip is published with the certified numbers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eWhy a 3-Inch Base\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003eA wind rating comes from the whole pole, not the diameter alone. A fatter pole catches more wind, so it only wins when the structure is engineered for it. The HD is: a heavy-duty 3-inch base where the bending load lives, every joint bolted in stainless, engineered to ASCE 7-10. For reference, the standard 2-inch 28-footer is rated 55 MPH, and the HD is rated well above it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 28px;\"\u003e\n\u003cp style=\"font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;margin:0 0 8px;\"\u003eWhich 28-Footer? Same Antenna, Two Builds\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:8px 10px;width:24%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;font-weight:bold;color:#1a1a1a;\"\u003e28' (2-inch)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;font-weight:bold;color:#1a1a1a;\"\u003e28' HD (3-inch base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eSignal\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;font-weight:bold;\"\u003eIdentical: every band 160-6M, same feedpoint, same performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eWind (ASCE 7-10)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e55 MPH (DX Flagpole: 35 with the flag flying)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;font-weight:bold;\"\u003eWell above the standard 28'; certified numbers published with the final engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eWith the 9' whip\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eSkyline 37\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;font-weight:bold;\"\u003e37 feet on a heavy-duty base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eBuilt for\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eMost yards and HOA lots; tilt it down ahead of a big storm\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eOpen ground, ridgelines, coastline, high plains, northern winters: sites where wind is the design problem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003ePrice\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e$1,250 DX Vertical · $1,295 DX Flagpole\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e$2,195 DX Vertical · $2,240 DX Flagpole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eShips\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eWithin days\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eIn 1-2 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eTilt\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eTilt-Up Base\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e3\" HD Tilt-Up Base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"margin:10px 0 0;font-size:14px;\"\u003eNot sure which your site needs? Call 435-200-4902 and tell us about it. \u003ca href=\"\/products\/28-foot-vertical-antenna\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eSee the standard 28' →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eWhy No Radials, and Why It Works\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eA traditional quarter-wave vertical feeds at its base, so every ohm of ground resistance sits in series with the antenna and steals signal before it leaves your yard. The Greyline VDA is a vertical dipole: return current flows through the lower element, not a buried radial field, so the antenna stops depending on your soil. Frozen ground, rock and sand included. One feedpoint, every band.\u003c\/p\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003ePair It With the 3\" HD Tilt-Up Base\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 14px;\"\u003eA heavier pole deserves its own tilt. The \u003ca href=\"\/products\/tilt-up-base-kit-3-in-od-poles-and-masts\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003e3\" HD Tilt-Up Base\u003c\/a\u003e is built alongside the antenna, with the same one-direction pivot that stops dead at vertical, so the HD comes down for maintenance or ahead of a storm. It ships in the same window, and it's $25 off with the HD in the cart.\u003c\/p\u003e\n\u003cdiv style=\"background:#ffffff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 28px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eWatch: 14 Seconds\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003eOne person raises a 24' Greyline alone on the standard Tilt-Up Base. The HD tilt uses the same pivot, scaled for the heavier pole. \u003ca href=\"https:\/\/youtu.be\/maFU_DfyiyY\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eWatch the 14-second raise →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eSpecs\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:0 0 28px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;width:38%;\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e28 feet; 37 feet with the 9' DX Whip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003ePole\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eHeavy-duty 3\" base, 6061-T6 aluminum, stainless hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eBands\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eEvery band, 160-6M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eDesign\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eVDA, Vertical Dipole Antenna, off-center fed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eRadials\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWind\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eASCE 7-10, rated well above the standard 28'; certified numbers, with and without the whip, published with the final engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eFoundation\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eAbout 12 cubic feet of 3,000 psi concrete over gravel, set plumb; PE-designed foundation for exposed or critical sites; drawing included with your order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003ePublished with the certified wind rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eShips\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eIn 1-2 weeks; free to the USA and Canada; worldwide at carrier cost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eHome\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eDesigned and built in the Mountain West · KL2A and HQ in Sun Valley, Idaho\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e7 years. We improve the design whenever we learn a better way; this page is the current reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#888;margin:0 0 16px;\"\u003ePhoto: a standard Greyline 28-footer. HD build photos from the bench are coming.\u003c\/p\u003e\n\u003cp style=\"font-size:13px;color:#888;font-style:italic;margin:0;\"\u003eHam Radio is fun again! Pass it on… 73, Jon KL2A · Greyline Performance · 435-200-4902\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50219631051029,"sku":"GL-HD28-3OD","price":2195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/greylinehfstealthantennahoaflagpoleWB2DCA-28-roof-mounted_480x480_255feb80-e977-4dc9-a22f-01f93f6988e9.png?v=1791309545"},{"product_id":"28-hd-dx-flagpole-heavy-duty-3-inch","title":"28' HD DX Flagpole | Heavy-Duty 3\" Base, Flies the Flag, 160-6M","description":"\u003cdiv style=\"max-width:860px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#555;line-height:1.65;\"\u003e\n\u003cp style=\"font-size:11px;text-transform:uppercase;letter-spacing:2.5px;color:#b8960c;font-weight:bold;margin:0 0 8px;\"\u003eHeavy-Duty · 3-Inch Base · Flies the Flag · 160-6M · No Radials · Made in USA\u003c\/p\u003e\n\u003ch2 style=\"font-size:26px;font-weight:bold;color:#1a1a1a;line-height:1.25;margin:0 0 14px;\"\u003eThe 28' HD DX Flagpole: Fly the Flag Where the Wind Blows.\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;margin:0 0 14px;\"\u003eA real flagpole that is also a full HF station: every band, 160 through 6, from a single feedpoint with no radials, built on a heavy-duty 3-inch base. For exposed lots, open ground, coastline and northern winters, where you want the flag flying and the margin to keep it there.\u003c\/p\u003e\n\u003cdiv style=\"background:#1a1a1a;color:#e8e8e8;padding:20px 24px;border-left:4px solid #B8960C;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eNow Taking Orders — Ships in 1-2 Weeks\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;color:#e8e8e8;\"\u003eBuilt alongside the 28' HD in the same run, free shipping to the USA and Canada. Rated well above the standard 28' DX Flagpole, flag up and flag down; the certified ASCE 7-10 numbers are published here with the final engineering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1.5px solid #B8960C;padding:16px 20px;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 8px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eMake It a System: Built for Wind\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;font-size:15px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e3\" HD Tilt-Up Base\u003c\/strong\u003e — walk the HD down ahead of a big storm and back up after. $25 off with the HD in the cart. \u003ca href=\"\/products\/tilt-up-base-kit-3-in-od-poles-and-masts\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eSee the tilt →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;font-size:15px;\"\u003e\u003cstrong style=\"color:#1a1a1a;\"\u003e9' DX Whip\u003c\/strong\u003e — seats in the top truck for 37 feet and more signal on 40, 80 and 160. $25 off with an antenna. \u003ca href=\"\/products\/9-foot-whip-for-greyline-antennas\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eSee the whip →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:14px;\"\u003eThe whole family on one page: \u003ca href=\"\/collections\/hd-heavy-duty-antennas\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eThe 28' HD Series →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f7f4ec;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 24px;\"\u003e\n\u003cp style=\"margin:0 0 6px;font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;\"\u003eWhy the Flag Changes Everything\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003eOn a flagpole, the flag is the biggest wind load, far more than the pole itself. That is why the standard 28' DX Flagpole is rated 35 MPH with the flag flying. The HD's heavy-duty 3-inch base is engineered for that load, so the flag can stay up through the kind of wind that sends a standard pole's flag down the halyard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:1px solid #DDD8CC;border-top:3px solid #B8960C;padding:16px 20px;margin:0 0 28px;\"\u003e\n\u003cp style=\"font-size:12px;font-weight:bold;color:#b8960c;text-transform:uppercase;letter-spacing:1px;margin:0 0 8px;\"\u003eWhich 28' Flagpole? Same Antenna, Two Builds\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:8px 10px;width:24%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;font-weight:bold;color:#1a1a1a;\"\u003e28' DX Flagpole (2-inch)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;font-weight:bold;color:#1a1a1a;\"\u003e28' HD DX Flagpole (3-inch base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eSignal\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;font-weight:bold;\"\u003eIdentical: every band 160-6M, same feedpoint, same performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eWind (ASCE 7-10)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e35 MPH flag flying, 55 MPH flag down\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;font-weight:bold;\"\u003eWell above the standard 28', flag up and flag down; certified numbers published with the final engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eBuilt for\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eMost yards and HOA lots\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eOpen ground, ridgelines, coastline, high plains, northern winters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003ePrice\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e$1,295\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e$2,240\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eTilt\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003eTilt-Up Base\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;vertical-align:top;\"\u003e3\" HD Tilt-Up Base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"margin:10px 0 0;font-size:14px;\"\u003eNot sure which your site needs? Call 435-200-4902 and tell us about it. \u003ca href=\"\/products\/28-hd-heavy-duty-3-inch-greyline-hf-vertical\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003eSee the 28' HD DX Vertical →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eA Flagpole First, to Every Neighbor\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eFlag kit included: halyard, truck and cleat, ready for your flag. To the street it is a handsome flagpole. To you it is a full HF station on every band from 160 to 6.\u003c\/p\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eWhy No Radials, and Why It Works\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eA traditional quarter-wave vertical feeds at its base, so every ohm of ground resistance sits in series with the antenna and steals signal before it leaves your yard. The Greyline VDA is a vertical dipole: return current flows through the lower element, not a buried radial field, so the antenna stops depending on your soil. Frozen ground, rock and sand included. One feedpoint, every band.\u003c\/p\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eThe Foundation\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eThe HD goes in on a real foundation: its sleeve set plumb in about 12 cubic feet of 3,000 psi concrete over a gravel bed for drainage, checked plumb from two directions before the concrete cures. You can pour before the antenna arrives, ahead of frozen ground, and set the pole whenever it gets there. That covers an average install in typical soil; an exposed or critical site may call for a foundation designed by a registered professional engineer, and we will tell you if yours does. The foundation drawing comes with your order.\u003c\/p\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003ePair It With the 3\" HD Tilt-Up Base\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eThe \u003ca href=\"\/products\/tilt-up-base-kit-3-in-od-poles-and-masts\" target=\"_blank\" rel=\"noopener\" style=\"color:#b8960c;font-weight:bold;text-decoration:none;\"\u003e3\" HD Tilt-Up Base\u003c\/a\u003e is built alongside the antenna, with the same one-direction pivot that stops dead at vertical, so the HD comes down ahead of a big storm and goes back up after. $25 off with the HD in the cart.\u003c\/p\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eSpecs\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:0 0 28px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;width:38%;\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e28 feet; 37 feet with the 9' DX Whip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003ePole\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eHeavy-duty 3\" base, 6061-T6 aluminum, stainless hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eFoundation\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eAbout 12 cubic feet of 3,000 psi concrete over gravel, set plumb; PE-designed foundation for exposed or critical sites; drawing included with your order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eFlag\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eFlag kit included: halyard, truck and cleat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eBands\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eEvery band, 160-6M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eDesign\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eVDA, Vertical Dipole Antenna, off-center fed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eRadials\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWind\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eASCE 7-10, rated well above the standard 28' DX Flagpole, flag up and flag down; certified numbers, with and without the whip, published with the final engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eShips\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eIn 1-2 weeks; free to the USA and Canada; worldwide at carrier cost\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eHome\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eDesigned and built in the Mountain West · KL2A and HQ in Sun Valley, Idaho\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e7 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp style=\"font-size:13px;color:#888;font-style:italic;margin:0;\"\u003eHam Radio is fun again! Pass it on… 73, Jon KL2A · Greyline Performance · 435-200-4902\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Greyline Performance","offers":[{"title":"Default Title","offer_id":50241609564437,"sku":"GL-28-HD-DXF","price":2240.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/greylinehfstealthantennahoaflagpoleWB2DCA-28-roof-mounted_480x480_1dabef7d-4776-4c9c-8b7d-73d0b32a9a78.png?v=1791684680"}],"url":"https:\/\/greylineperformance.com\/collections\/hd-heavy-duty-antennas.oembed","provider":"Greyline Performance Antennas","version":"1.0","type":"link"}