Heavy-Duty Base · Flies the Flag · 160-6M · No Radials · Made in USA
The 28' HD DX Flagpole: Fly the Flag Where the Wind Blows.
A real flagpole that is also a full HF station: every band, 160 through 6, from a single feedpoint with no radials, built on an oversized heavy-duty base. For exposed lots, open ground, coastline and northern winters, where you want the flag flying and the margin to keep it there.
Two Reasons People Choose HD
Wind today. About 80 mph with the flag flying and about 94 with it lowered (preliminary engineering estimates; PE-certified ratings to follow), against 35 and 55 for the standard 28-foot.
Height tomorrow. The heavy-duty base is a platform. Add the 9' whip and it is a Skyline 37 HD. Add a section and it is a 32' HD, then a Skyline 41 HD. Add below the feedpoint, 4 feet, 8 feet and more, and you raise the feedpoint and lift the image, the other half of a vertical's RF picture, with a longer ladder line to match. Buy the base once; grow the antenna for years.
Make It a System: Built for Wind
3" HD Tilt-Up Base — walk the HD down ahead of a big storm and back up after, and make every height change at waist level. $25 off with the HD in the cart. See the tilt →
9' DX Whip — seats in the top truck for 37 feet and more signal on 40, 80 and 160. $25 off with an antenna. See the whip →
The whole family on one page: The HD Series →
Why the Flag Changes Everything
On 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 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.
Which 28' Flagpole? Same Antenna, Two Builds
| 28' DX Flagpole (2-inch) | 28' HD DX Flagpole (heavy-duty base) | |
| Signal | Identical: every band 160-6M, same feedpoint, same performance | |
| Wind | 35 MPH flag flying, 55 MPH flag down (ASCE 7-10) | About 80 flag flying, about 94 flag down (preliminary; PE-certified to follow) |
| Built for | Most yards and HOA lots | Open ground, ridgelines, coastline, high plains, northern winters; and owners who plan to grow the pole |
| Price | $1,325 | $2,270 |
| Tilt | Tilt-Up Base | 3" HD Tilt-Up Base |
See the 28' HD DX Vertical → · See the standard 28' DX Flagpole →
A Flagpole First, to Every Neighbor
Flag 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. Our free HOA letter writes the board request in two minutes, fitted to your state.
Why No Radials, and Why It Works
A 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.
The Foundation
The 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. The foundation drawing is on the Assembly Documents page, with every other manual, always current.
Pair It With the 3" HD Tilt-Up Base
The 3" HD Tilt-Up Base 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, one person, no ladder. $25 off with the HD in the cart.
Specs
| Height | 28 feet; 37 feet with the 9' DX Whip; grows with sections above or below the feedpoint |
| Pole | Oversized heavy-duty base, 6061-T6 aluminum, stainless hardware |
| Foundation | About 12 cubic feet of 3,000 psi concrete over gravel, set plumb; PE-designed foundation for exposed or critical sites; drawing on the Assembly Documents page |
| Flag | Flag kit included: halyard, truck and cleat |
| Bands | Every band, 160-6M |
| Design | VDA, Vertical Dipole Antenna, off-center fed |
| Radials | None |
| Wind | About 80 MPH flag flying, about 94 MPH flag down; preliminary engineering estimates, PE-certified ratings to follow |
| Ships | In 1-2 weeks; free to the USA and Canada; worldwide at carrier cost |
| Home | Designed and built in the Mountain West · KL2A and HQ in Sun Valley, Idaho |
| Warranty | 7 years |
Ham Radio is fun again! Pass it on… 73, Jon KL2A · Greyline Performance · 435-200-4902