{"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 · 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 3-inch heavy-duty sections instead of 2. 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. The certified ASCE 7-10 wind rating is published here before the first one ships.\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 3 Inches\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;\"\u003eA wind rating comes from the whole section, not the diameter alone — a fatter pole catches more wind, so it only wins when the section is engineered for it. The HD is: heavy-duty 3-inch sections, nested and bolted section to section, engineered to ASCE 7-10. For reference, the standard 2-inch 28-footer is rated 55 MPH.\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)\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;\"\u003eCertified rating published before the first one ships\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\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\" 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\" 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\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\" sections, 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 — certified rating published before the first one ships\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eAbout 43 lb of tubing, hardware extra\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; worldwide at carrier cost\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\u003ctr\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":null,"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","url":"https:\/\/greylineperformance.com\/products\/28-hd-heavy-duty-3-inch-greyline-hf-vertical","provider":"Greyline Performance Antennas","version":"1.0","type":"link"}