HF Vertical Antenna | 160-6M | No Radials | No Flagpole Hardware | Made in USA
The DXV28 - Maximum Aperture, Nothing to Explain to Anyone
The DXV28 is the tallest vertical Greyline builds. Twenty-eight feet of off-center fed vertical dipole covering 160 through 6 meters from a single feedpoint, with no buried radials and no flagpole hardware. At this height the geometry reaches 5/8-wave on 15 meters, and every band benefits from the added length up to that ceiling. Modeled gain figures are stated on the aperture page with their reference and band. If your lot is open and nobody needs convincing, this is the most antenna we make.
Why the Bare Vertical
The flagpole version exists to satisfy an HOA. If you do not have one to satisfy, the flag is just wind load. The DXV carries the same VDA core, the same aluminum, the same guarantee, and holds its full structural rating permanently, because there is nothing to lower when weather arrives. Less to buy, less to maintain, more margin in the wind.
Band Coverage
160-6M
All HF bands. One feedpoint.
Wind Rating
55 MPH
ASCE 7-10 engineered. No flag load.
Guarantee
7 Years
Free shipping USA. Sun Valley, Idaho.
"I run 32 feet of DXV at my own station and work Africa and Asia regularly on 10 through 30 meters. This week I am adding the 9-foot whip to it, because there is still more to be had. Go as tall as your lot allows. The improvement across the bands is real, and it is the cheapest signal you will ever buy."
Jon Kimball, KL2A | Founder, Greyline Performance
Field Report - Virginia, on this exact antenna
Independent review, published before purchase. First night: G4 on 160M, LZ on 80M, TZ4 on 20M, KP4, 9K, KH6, CE, and Europeans on 40M. Next morning: 31 QSOs in 15 minutes on 40M CW. MFJ shack tuner. Drake L7 amp. "It does work."
Rich, NN3W | 28' DXV | Verified Owner
Independent Assessment - Defense Antenna Executive
"I ran a defense antenna company for 7 years. I am very impressed with the look, quality, machining, and part fit. It is a professional-grade product." Concrete foundation. FT8 DX confirmed to Hawaii, South America, Europe, and Africa.
Rob Freedman, WC0R | Retired Defense Antenna Executive | Amateur Extra
The Physics
Why No Radials, and Why It Works
A traditional quarter-wave vertical feeds at the current maximum at its base, which pushes maximum resistive loss directly through soil. Every ohm of ground resistance sits in series with radiation resistance, taking signal before it leaves the yard. That is why those antennas ask for dozens of buried wires, and why they never quite deliver what the catalog promised on poor ground.
The Greyline VDA is a vertical dipole. Return current flows through the lower element rather than a buried radial field, which reduces ground coupling and removes the dependency on soil conductivity. That is the whole trick, and it is why a Greyline works on a rooftop, on concrete, on asphalt, and on frozen Alaskan ground where a radial field is not an option at any price.
The physics behind the no-radial vertical dipole is established, published work. The reference shelf is cited at the foot of this page, and a deeper explainer lives in the Signal Lab.
Before You Install - Run a Noise Audit
The 2-inch footprint is the smallest ground signature of any full-HF antenna. A traditional radial field extends hundreds of feet at 160 meters, running toward every noise source on the property. The VDA goes where you choose. Take a battery-powered AM radio, tune off any broadcast station, walk the property, and find the quietest spot. That is where the pole goes. On receive, six decibels less noise beats six decibels more power every time.
Full Installation GuideIn the Box
What Ships, and What You Supply
Included
- 28' DXV VDA Radiator
- RF Choke and Precision Feedline Hardware
- Ground Sleeve Kit, for in-ground, tower, roof, deck, or dock
- Assembly Manual and Tuning Guide
- 7-Year Performance Guarantee
You Supply
- Coax for the run to your shack
- An external antenna tuner, remote or desktop
Want the tuner handled? The DXV28 with the LDG RT-100 ships as a matched system.
This is the bare vertical. No flag, no flagpole hardware, no HOA documents. If you need those, you want the DXF28 flagpole version.
Structural Engineering
One Rating, and It Never Changes
The DXV28 is engineered to ASCE 7-10 and rated at 55 MPH. There is no second number, because there is no flag. On a flagpole antenna the flag is the dominant wind load, which is why federal protocol calls for lowering it in weather and why the flagpole version carries a lower figure with the flag flying. The DXV holds its rating whether you are home or not.
| Model | Height | Wind Rating | Standard |
|---|---|---|---|
| DXV12 | 12 feet | 155 MPH | ASCE 7-10 |
| DXV16 | 16 feet | 115 MPH | ASCE 7-10 |
| DXV20 | 20 feet | 90 MPH | ASCE 7-10 |
| DXV24 | 24 feet | 70 MPH | ASCE 7-10 |
| DXV28 | 28 feet | 55 MPH | ASCE 7-10 |
Standard 2-inch series, per ASCE 7-10. Shorter verticals carry substantially higher ratings. If your site is exposed, a shorter pole wearing the 9' DX Whip will out-reach a taller bare one and hold a better margin. Call 435-200-4902 and we will work out the right combination for your ground.
Construction - 6061-T6 Aircraft Aluminum
Outside: 2-inch OD, full length. A uniform profile top to bottom, clean and invisible as an antenna. Inside: the wall graduates where the physics demands it, 0.125 inch through the lower 30 percent where base bending stress peaks, and 0.065 inch through the upper 70 percent where reducing mass at height lowers dynamic wind load. No plastic anywhere. All metal, stainless hardware throughout.
At 28 feet the pole presents 4.67 square feet of wind surface, and the moment arm is at its longest. Every additional square foot of projected area translates directly into greater base bending stress and greater fatigue loading on every gust cycle. The graduated wall is not a cost measure. It is the correct engineering response: maximum material where bending stress peaks, minimum mass where it only adds load.
Every Greyline wind rating is derived from ASCE 7-10 values using actual geometry and published methodology. A wind rating without a cited standard is a guess dressed as a spec. Ask any antenna maker which standard they used. If they cannot name one, you have your answer.
Take It Further
Upgrades That Move the Needle
9' DX Whip
Adds nine feet of aperture and extends the upper radiator on every band. Telescopes to 11.5 feet. The founder is putting one on his own station this week.
View WhipTilt-Up Base
Raise and lower it alone, in minutes. At 28 feet this is the difference between servicing the top yourself and needing a second man.
View Tilt BaseHOA Trouble Later?
The DX Flag Kit converts this vertical into a flagpole antenna if the neighbourhood ever starts asking questions.
View Flag Kit160-6M, One Pole
The DXV28 is the largest electromagnetic capture area Greyline ships in a residential vertical: 160 meters through 6 meters, no radials, any surface. Adding the 9' DX Whip extends the upper radiator on every band and moves the 5/8-wave point toward 17 and 20 meters. Modeled gain figures are stated with their reference antenna and ground conditions on the aperture page.
Specs and Shipping
| Spec | Detail |
|---|---|
| Height | 28 feet |
| Band Coverage | 160-6M, all HF plus 6M |
| Design | VDA, off-center fed vertical dipole |
| Outer Diameter | 2 inches, standard series |
| Wind Rating | 55 MPH, ASCE 7-10, no flag load |
| Projected Wind Area | 4.67 square feet |
| Radials Required | None |
| Mounting Surfaces | Ground, rooftop, concrete, asphalt, frozen ground |
| Power Handling | Legal limit, constrained only by ATU rating |
| Material | 6061-T6 aircraft-grade aluminum |
| Shipping | Free in the USA. International rates at checkout. |
| Made In | Sun Valley, Idaho, USA |
| Guarantee | 7-Year Performance Guarantee |
Common Questions
Before You Order, Answered.
Does a tuner come with this?
No. This is the antenna alone. An external antenna tuner is required, because the VDA covers 160-6M from one feedpoint by matching impedance variation across bands, and most radio-internal tuners will not handle the full range on every band.
The tuner can live at the antenna base as a weather-sealed remote unit such as the LDG RT-100, or in the shack as a desktop unit. Plenty of Greyline operators run each way and get excellent results. The deciding factor is usually the length and condition of your feedline run. If you would rather have it handled, the matched bundle ships both together.
One note for digital operators: all ATUs carry a reduced power rating for FT8, Winlink, and JS8Call because of the duty cycle. Check your tuner's digital rating before running full power. The antenna handles the legal limit on every band; the tuner is the only ceiling.
What is the current lead time and availability?
Each antenna is hand-built to order during the current artisan production run. Current lead time is always posted on the Order Status page. Call 435-200-4902 for your actual ship date.
Is 55 MPH enough for my site?
That depends on your ground, and it is worth a phone call rather than a guess. Twenty-eight feet is a long moment arm, and the honest answer for an exposed site is often a shorter pole. The DXV24 is rated 70 MPH, the DXV20 90, and the DXV12 155.
Here is the part most people miss: a shorter pole with the 9' DX Whip on top gives you back the aperture and keeps the higher wind rating. A DXV24 wearing the whip stands taller than a bare DXV28. Add the Tilt-Up Base and you can lay the whole thing down before a storm rather than hoping. Call 435-200-4902 and we will work it out for your site.
Can I mount this on a roof, a deck, or concrete?
Yes, and that is the point of the design. With no radial field required, the antenna does not care what is under it. Ground, rooftop, concrete pad, asphalt, and frozen ground all work. The included ground sleeve kit covers in-ground, tower, roof, deck, and dock mounting, and the Deck and Concrete Tilt Mount handles the no-dig cases.
How difficult is installation, and how long does it take?
Most operators are on the air in under an hour. Set the base, build the sections in 15 to 30 minutes, stand it up, run coax, connect the tuner. All stainless hardware arrives pre-fastened, so there is nothing loose to lose in the grass.
Assembly documents are at Setup and Manuals. Questions during the install? Call 435-200-4902.
What does the 7-Year Guarantee cover?
Seven years of performance coverage. If it fails under normal operating conditions, we make it right. We have replaced antennas damaged by once-in-a-decade ice storms without argument. Full terms at 7-Year Warranty Policy.
Every 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.
The full shelf lives under The Signal Lab, The Shelf We Read From in the menu, open to everyone.
Ready?
The DXV28 Ships Free in the USA
Hand-built in Sun Valley, Idaho. Maximum aperture, 160 through 6 meters, no radials, any surface.
Order the DXV28Not sure this is the right height? Call 435-200-4902 and a real person will work it out with you.
Want the tuner included? The DXV28 with the LDG RT-100. Need it to read as a flagpole for the HOA? The DXF28.
Ham Radio is fun again! Pass it on. 73, The Greyline Performance Team | Sun Valley, Idaho | 435-200-4902