24' DX Flagpole Antenna — 160-6M, No Radials

HOA Stealth Flagpole Antenna · 160–6M · No Radials · Made in USA

The DXF24 — More Aperture. Serious Low-Band Performance.

The DXF24 is the choice for operators who want meaningful low-band improvement and have the lot for it. Four additional feet of aperture over the DXF20 makes a measurable difference on 40 and 80 meters. At 24 feet it still reads as a standard residential flagpole. A property asset in every sense — commercial-grade construction, HOA documentation included, and the curb appeal that makes neighbors ask where you bought your flagpole.

Why a Flagpole Antenna?

Most HOA CC&Rs explicitly permit residential flagpoles. The DXF's RF function is entirely internal — no visible stubs, no loading coils, no radial wires. From the street, it's a flagpole. A handsome one. The antenna approval is already in the CC&Rs — it's called a flagpole permit.

⚑ Flag-Down Protocol

At 24 feet, the flag-up wind rating is 50 MPH. The 70 MPH flag-down rating is your ASCE 7-10 engineered structural number.

Field Report — HOA Golf Course Community

ARRL CW 160M Contest: 61 QSOs, 23 sections, 750–1,000 miles on 1.8 MHz. Runs contests at legal limit on 40–10M. “Going from the 20 ft to the 24 ft antenna made a very big difference.”

— Bill · K3WA · PVRC President · 24' DXF · Verified Owner · Full contest report →

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.” HOA approved in Colorado. Concrete foundation. FT8 DX confirmed to Hawaii, South America, Europe, and Africa.

— Rob Freedman · WC0R · Retired Defense Antenna Executive · Amateur Extra · Colorado HOA · Full case study →

Field Report · Long-Term Reliability

Greg Newman, K7GAN — 24' DX Flagpole, 3.5 Years and Several Thousand QSOs

Greg installed his 24' Greyline DX Flagpole in a covenant-restricted area three and a half years ago. He's logged several thousand QSOs from it. His longest contact: 12,500 miles on FT8.

"Super quality material, was easy to install and performed better than expected. The DX Flagpole antennas are well worth the investment as they work extremely well, made of highest quality materials that will last for a very long time."

Why this matters: Three and a half years is enough time for materials to fail, joints to corrode, and design weaknesses to surface. The Greyline 24' DX Flagpole at K7GAN's QTH hasn't done any of those. 6061-T6 aluminum, threaded transitions, and clean RF design carry the antenna through years, not just install day.

Aperture Plus Wire

The 24' Antenna Earns Its Aperture. Don't Lose It In The Coax.

A 24-foot DXF delivers meaningful low-band aperture. The wrong feedline gives that gain right back as heat. Use the Feedline Loss Calculator to see how much of your power actually reaches the radiator on each band — especially 10M and 12M, where loss compounds fastest.

Open the Calculator →

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. Covers 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. Achieves 5/8λ geometry on 12 meters, near 1/2λ on 17 meters. Meaningful aperture advantage on 40 and 80 meters over shorter models.

Physics foundation: Zavrel W7SX · Antenna Physics: An Introduction (ARRL, 2020) · Kraus W8JK · Antennas (McGraw-Hill) · Deep dive: What is a VDA? →

Before You Install — Run a Noise Audit

The VDA’s 2-inch pole footprint is the smallest ground signature of any full-HF-coverage 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. 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 DXF is engineered to ASCE 7-10 structural standards. Federal practice: lower the flag when weather threatens. The flag-down rating is your engineering number.

Ratings per ASCE 7-10. Lower flag during approaching weather per US federal flag protocol.

Take It Further

Upgrades That Actually Move the Needle

160–6M, One Pole

The 24′ DXF covers 160 meters through 6 meters with no radials — more aperture means stronger low-band performance and a quieter receive across the spectrum. ASCE 7-10 wind-rated to 70 MPH. Adding the 9′ DX Whip extends the upper radiator on every band; the resulting geometry happens to land 5/8λ on 12M bare and 17M with the whip — with a half-wavelength on 20M simultaneously — where the literature documents up to 3.5 dBi over a 1/4-wave reference under ideal ground conditions.

Aperture & Gain — the honest physics →

HOA & XYL Approved

We’ve Done the Hard Part for You

Every DXF ships with an HOA Architectural Brief and Property Integrity Letter. A decade of field experience. Fewer than 10 storm damage reports. Zero HOA complaints.

Feed System Note

The DXF 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. McMaster-Carr hardware throughout.

At 24 feet, the Greyline VDA presents 4 square feet of wind surface (height × OD). A competing flagpole antenna at this height uses approximately 4" OD — a number their manufacturer declines to publish, inferred from their own base insulator dimensions. At 4" OD and 24 feet, that pole presents roughly 8 square feet of wind surface. Exactly double. Wind force scales with projected area linearly and with velocity squared. That same competitor claims a higher unflagged wind rating than the Greyline at this height — without citing any engineering methodology.

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 competitor which standard they used. If they can't cite one, you have your answer.

Limited Edition  ·  Artisan Production Run

This unit was built by hand — one at a time — by someone who knows every inch of it.

Same 6061-T6 aircraft aluminum. Same ASCE 7-10 wind ratings. Same VDA geometry. Same 7-year guarantee. Threaded transition sections machined directly into the metal — self-aligning, no through-bolting, less total weight.

This is a finite window. Manufacturing expanding. Things coming this year. Watch this space.

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.

Read the full shelf →

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