12' HF Vertical Antenna | No Radials | 160-6M | Greyline Performance

HF Vertical Dipole Antenna · 160–6M · No Radials · Made in USA

The DXV12 — Maximum Wind Rating. Any Surface.

The DXV12 is built for rooftop, hard-surface, and high-wind installations — a clean bare vertical with no flagpole hardware. The highest wind rating in the DXV lineup at 155 MPH, ASCE 7-10. Full 160–6M coverage with no radials. Deploys on concrete, asphalt, frozen ground, or rooftop without a ground system.

Why a Bare Vertical?

The DXV is the same vertical dipole as our flagpole series with the flag hardware left off — no visible stubs, no loading coils, no radial wires, no flag. A clean 2-inch pole that disappears against a rooftop, a tree line, or a commercial mast. For operators who don't need the flagpole disguise, it is the most direct path to the VDA architecture.

The field report below comes from an operator running a 16' Greyline DXF — the same VDA core and the same no-radial architecture as the DXV12, at a taller height. His configuration is named with his report.

Field Report — Height-Restricted HOA

A Phoenix-area operator with a 16-foot HOA height restriction runs confirmed SWR on every band from 160 through 6 meters. The VDA doesn't need height to load — it needs a good tuner and the right feedline. Go as tall as your lot allows. Work everything either way.

— Roy · KJ7CWQ · Phoenix, AZ · 16' DXF · Verified Owner

Need more aperture? Step up the line:

The Physics

Why No Radials — and Why It Works

Traditional quarter-wave verticals feed at the current maximum at the base — pushing maximum I²R loss directly through soil. Every ohm of ground resistance sits in series with your radiation resistance, stealing signal before it leaves your yard.

The Greyline VDA is a vertical dipole. It works every band, 160–6M, from a single feedpoint with no radials. Return current flows through the lower element, not through a buried radial field, significantly reducing ground coupling and removing dependency on soil conductivity. Performance is consistent on any surface, and the geometry reaches 5/8-wave on 6 meters.

The physics behind the no-radial vertical dipole is established, published work — the full reference shelf is cited below, and a deeper VDA explainer lives in the Signal Lab for further study.

The Gain Figures, With Their Reference

Full per-band modeled figures and their reference are stated on one sourced page so the numbers stay consistent everywhere. Aperture & Gain — the modeled figures →

Before You Install — Run a Noise Audit

The VDA has a 2-inch pole footprint and no radial field at all. 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. Grab a battery-powered AM radio, tune off any broadcast station, walk your property, and find the quietest spot. That's where the pole goes.

In the Box

Everything You Need. Nothing You Don't.

Structural Engineering

Built for Real Weather

Every DXV is engineered to ASCE 7-10 structural standards. With no flag, the DXV carries no flag drag — so it holds a single rating equal to the flag-down figure of the matching flagpole, because with the flag stowed that is what the flagpole is. A flagpole cannot be stronger than the bare pole it is built from. When you compare antennas, the question worth asking is which standard produced the number.

Ratings per ASCE 7-10 for the bare vertical. The end customer is responsible for a foundation suited to the site.

Complete The Station

Three Discounts. One Cart. No Codes.

All three of these come off automatically when they ride in the same cart as the antenna. No codes.

Sites & Deployment

Built for Where a Bare Pole Belongs

The DXV goes where the flagpole disguise isn't needed — rooftops, open yards, waterfront, towers, and commercial or agency sites. A decade of field experience behind the design.

Feed System Note

The DXV is a balanced VDA — tuner and RF choke must maintain a floating balanced feed. See the Tuner & Balun Configuration Guide →

Specs & Shipping

Construction — 6061-T6 Aircraft Aluminum

Outside: 2" OD, full length — uniform profile top to bottom. Clean. Sleek. Invisible as an antenna. Inside: wall graduates where the physics demands it — 0.125" lower 30% where base bending stress peaks, 0.065" upper 70% where reducing mass at height lowers dynamic wind loads. Zero plastic. All-metal. Stainless hardware throughout. Threaded transition sections machined directly into the metal — self-aligning, no through-bolting, less total weight.

A note on diameter, because it's widely misread: a thicker pole is not automatically a stronger one. Wind force scales with projected area — the width the wind actually sees — so doubling a pole's diameter roughly doubles the wind load it must survive, before accounting for the extra mass carried at height and the added dynamic fatigue on every gust cycle. The Greyline runs a 2-inch outer diameter precisely because a slim, engineered section sheds wind better than a fat one fights it. Narrower, run correctly, is the stronger answer.

Every Greyline wind rating is derived from ASCE 7-10 structural engineering values — actual geometry, actual math, 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 can't cite one, you have your answer.

Common Questions

Before You Order — Answered.

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 — Zavrel, Kraus, Severns, Maxwell, Lewallen — lives under The Signal Lab · The Shelf We Read From in the menu, open to everyone.

Ham Radio is fun again! Pass it on... 73, The Greyline Performance Team · Sun Valley, Idaho · 435-200-4902