{"product_id":"20-hd-heavy-duty-greyline-hf-vertical","title":"20' HD | Heavy-Duty Greyline HF Vertical, 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;\"\u003eHD Series · Heavy-Duty · 20 Feet · 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 20' HD: The Strongest Greyline We Build.\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;margin:0 0 14px;\"\u003eEvery band 160 through 6 from a single feedpoint, no radials, on an oversized heavy-duty base. At 20 feet it keeps a low profile for strict height limits and stands up to the worst weather on the coast, the plains and the ridgelines.\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;\"\u003eAbout 124 MPH at 20 Feet · Now Taking Orders\u003c\/p\u003e\n\u003cp style=\"margin:0;font-size:15px;color:#e8e8e8;\"\u003eOur engineering model puts the 20' HD at about 124 mph, against 90 mph for the standard 20-foot vertical. Ships in 1-2 weeks with free shipping to the USA and Canada. That figure is a preliminary engineering estimate; the PE-certified rating will be published here when complete.\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 20-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;\"\u003e20' DX Vertical\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;font-weight:bold;color:#1a1a1a;\"\u003e20' HD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\u003eSignal\u003c\/td\u003e\n\u003ctd colspan=\"2\" style=\"padding:8px 10px;border-top:1px solid #EEE8DC;font-weight:bold;\"\u003eIdentical: every band 160-6M, same feedpoint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\u003eWind\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\u003e90 mph (ASCE 7-10)\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;font-weight:bold;\"\u003eAbout 124 mph*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\u003eTilt\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\u003eTilt-Up Base\u003c\/td\u003e\n\u003ctd style=\"padding:8px 10px;border-top:1px solid #EEE8DC;\"\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:13px;color:#888;\"\u003e*Preliminary engineering estimate; PE-certified rating to follow. Not sure which your site needs? Call 435-200-4902.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"font-size:19px;font-weight:bold;color:#1a1a1a;margin:0 0 10px;\"\u003eEvery Band, From One Feedpoint\u003c\/h3\u003e\n\u003cp style=\"font-size:15px;margin:0 0 28px;\"\u003eEvery Greyline works every band, 160 through 6. At 20 feet the antenna also runs ahead of a full-radial quarter-wave on 20 through 10 meters in NEC modeling over average ground, strongest on 10. The Greyline is a vertical dipole: return current flows through the lower element, not a buried radial field, so frozen ground, rock and sand don't matter.\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;\"\u003e20 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;\"\u003eOversized heavy-duty 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, one feedpoint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\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 style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eWind\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eAbout 124 mph (preliminary engineering estimate); PE-certified rating to follow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eFoundation\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003eHeavy-duty concrete foundation, set plumb; drawing included with your order; PE-designed foundation for exposed or critical sites\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f8f6;\"\u003e\n\u003ctd style=\"padding:9px 12px;\"\u003eIn the box\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:bold;\"\u003e20' HD radiator with top truck, feedline kit (ladder line, five snap-on ferrites, ladder-line to PL-259 adapter, spacers)\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;\"\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":50314774708501,"sku":"GL-20-HD-DXV","price":1995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0028\/2571\/5779\/files\/greylinehfstealthantennahoaflagpoleWB2DCA-28-roof-mounted_480x480_74a80d17-6930-4a1b-b683-612e5810c50e.png?v=1792853303","url":"https:\/\/greylineperformance.com\/ar\/products\/20-hd-heavy-duty-greyline-hf-vertical","provider":"Greyline Performance Antennas","version":"1.0","type":"link"}