HOA Stealth Flagpole Antenna · 160-6M · No Radials · Made in USA
The DXF24 — More Aperture. Serious Low-Band Performance.
The DXF24 works every band, 160-6M, from a single feedpoint with no radials and no ground system — that is the headline. At 24 feet the low-band aperture comes into its own, where length is what matters 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.
Not sure this is the right height for your lot? Call us at 435-200-4902 and we will spec your system in ten minutes — your lot, your HOA, your bands, your power. A real person answers, and we would rather talk you into the right antenna than the expensive one.
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 is a flagpole. A handsome one. The antenna approval is already in the CC&Rs — it is called a flagpole permit.
Band Coverage
160-6M
All HF bands. One antenna.
Ground System
No Radials
One feedpoint. Any surface.
Guarantee
7 Years
Free shipping USA and Canada. Made in Sun Valley, Idaho.
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
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 · 29' DX Flagpole · Colorado HOA
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 has 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 has not done any of those. 6061-T6 aluminum, threaded transitions, and clean RF design carry the antenna through years, not just install day.
The Physics
Why No Radials — and Why It Works
Traditional quarter-wave verticals feed at the current maximum at the base — pushing maximum resistive 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. On top of full coverage, the geometry approaches 5/8-wave on the upper bands for strong low-angle DX radiation, and at 24 feet the added aperture lifts the low bands where it counts.
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.
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 and 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 is where the pole goes.
Full Installation Guide →In the Box
Everything You Need. Nothing You Don't.
Antenna System
- 24' DXF Flagpole VDA Radiator
- RF Choke and Precision Feedline Hardware
- Ground Sleeve Kit
- Assembly Manual and Tuning Guide
HOA and Household
- USA-Made Flag Kit Hardware
- HOA Architectural Brief
- Property Integrity Letter (XYL and HOA ready)
- 7-Year Performance Guarantee
You supply two things: coax for the run to your shack, and an external antenna tuner. Both are covered below.
Structural Engineering
Built for Real Weather
Every DXF is engineered to ASCE 7-10 structural standards. The flag is the dominant wind load, which is why the two columns differ. Stowing the flag removes that drag and returns the pole to its bare-vertical rating, which is why federal flag practice already tells you to lower the flag when weather threatens. When you compare antennas, the question worth asking is which standard produced the number. A figure you can stand behind in a storm is worth more than a bigger one you cannot.
| Model | Flag Up | Flag Down | Standard |
|---|---|---|---|
| DXF12 | 100 MPH | 155 MPH | ASCE 7-10 |
| DXF16 | 75 MPH | 115 MPH | ASCE 7-10 |
| DXF20 | 60 MPH | 90 MPH | ASCE 7-10 |
| DXF24 | 50 MPH | 70 MPH | ASCE 7-10 |
| DXF28 | 35 MPH | 55 MPH | ASCE 7-10 |
Ratings per ASCE 7-10. Lower flag during approaching weather per US federal flag protocol. Flag-down figures match the bare DXV vertical of the same height, because with the flag stowed that is what the pole is. The 9' DX Whip is removable in about two minutes with a tilt-up base, so the pole returns to its published rating whenever the whip comes down.
Take It Further
Complete The Station
The tilt-up base and the RT-100 come off automatically when they ride in the same cart as the antenna. Nothing to enter, nothing to remember. The rest are simply worth knowing about.
Coax Feedline — Genuine Times Microwave
The 24-footer earns its aperture. The wrong feedline gives it right back as heat. LMR-400, LMR-600 and Andrew Heliax, cut to length, terminated and weatherproofed. Check what your run costs you on the Loss Calculator.
See The Coax Line →Tilt-Up Base — $25 Off
Two minutes, alone, no ladder. With a flag, a halyard and a whip to service, this is what keeps the whole thing a one-person job for life. Raise the whip for a contest weekend, lower it Sunday night, lower the flag before a storm.
View Tilt Base →RT-100 Remote Tuner — $25 Off
Weatherproof remote ATU at the feedpoint, powered over the coax, one-button tuning 160-6M. A wide-range ATU is required either way; a desktop tuner works too.
View The RT-100 →9' DX Whip — A Mode, Not a Commitment
Nine more feet of radiator on top, paying most where the antenna is electrically shortest. Telescopes to 11.5 feet. With a tilt-up base it goes up and comes down in about two minutes — run tall after dark or on a contest weekend, and return to the bare pole the rest of the time. The flag and the whip fly together.
View Whip →4' Vertical Extension
Four more feet of radiator, added at the top section. The smallest permanent step up the line — a 24-foot pole becomes 28 feet of aperture without a new antenna. Ships with the transition splice.
View Extension →316 Marine Hardware
Salt air finds the fasteners first. Every antenna ships with stainless hardware throughout; for waterfront, coastal and dock installs, the 316 marine kit is the grade specified for saltwater service. Fits 12' through 28'.
View 316 Marine Kit →No flag needed? The DXV24 delivers identical VDA performance without flagpole hardware, and holds the 70 MPH rating with nothing to lower.
HOA and 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, and a simple design truth: the HOA sees a flagpole, because that is what it is.
For Your HOA Board
Architectural brief, wind ratings, approval letter — ready to print and submit.
HOA Approval Toolkit →For Your XYL and Neighbors
Appearance, safety, property values — addressed directly. Hand it over, let it do the work.
Neighbor and XYL FAQ →Feed System Note
The DXF is a balanced VDA — tuner and RF choke must maintain a floating balanced feed. See the Tuner and Balun Configuration Guide, and the Feedline System Kits page for the full run from feedpoint to shack.
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.
A note on diameter, because it is 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 for their outer diameter and the standard behind their rating. Ours are both printed above.
Specs and Shipping
| Spec | Detail |
|---|---|
| Height | 24 feet |
| Band Coverage | 160-6M (all HF + 6M) |
| Design | VDA — Vertical Dipole Antenna, OCF |
| Modeled Gain | Per-band figures, with their reference, on the Aperture and Gain page → |
| Power Handling | Legal limit — constrained only by ATU rating |
| Radials Required | None |
| Material | 6061-T6 Aircraft-Grade Aluminum + Fiberglass |
| Hardware | Stainless throughout; 316 marine kit available for coastal sites |
| Wind Rating (Flag Up) | 50 MPH — ASCE 7-10 |
| Wind Rating (Flag Down) | 70 MPH — ASCE 7-10 |
| Shipping | Free — USA and Canada. International rates at checkout. |
| Made In | Sun Valley, Idaho — USA |
| Guarantee | 7-Year Performance Guarantee |
Common Questions
Before You Order — Answered.
What is the current lead time and availability?
Each antenna is hand-built to order. Current lead time is always posted on the Order Status page. Call 435-200-4902 for a specific ship date.
Does the 9' whip change my wind rating?
Yes. Nine more feet of radiator adds projected area at the top of the pole, where the moment arm is longest — the same reason the flag matters. We do not publish a with-whip figure, and you should be skeptical of anyone who does without naming a standard.
What we can tell you plainly: with the whip down, the antenna is the bare pole at the rating printed in the table above. That is why the whip and the Tilt-Up Base belong together. Two minutes, alone, no ladder — up when you want the aperture, down when weather is coming. If your site is exposed, call us before you order a whip and we will talk it through.
What coax should I run, and how long?
Measure radio to feedpoint and add about 15 percent for routing, entry, and a service loop at each end. A 50-foot straight-line run usually wants a 70-foot assembly. A short cable is a long day.
For grade: LMR-400 class is the sweet spot at HF, under 0.7 dB per 100 feet. LMR-600 halves that and earns its premium on runs past 100 feet, at full legal limit, or on buried installs. Run your own numbers on the Feedline Loss Calculator, then see the assembled runs — genuine Times Microwave and Andrew Heliax, terminated, weatherproofed and labeled.
Can I get marine-grade hardware for a coastal install?
Yes. Every Greyline ships with stainless hardware throughout as standard. For waterfront, coastal and dock sites, the 316 Marine Stainless Hardware Kit → is the grade specified for saltwater service. It fits 12' through 28' — order it with the antenna.
What is included — do I need to source anything separately?
Everything to assemble and mount is in the box. You supply coax and an ATU. That is it.
VDA Radiator (your chosen height)
RF Choke and Precision Feedline Hardware
Ground Sleeve Kit — in-ground, tower, roof, deck, dock compatible
Assembly Manual and Tuning Guide
7-Year Performance Guarantee
DXF Flagpole models also include: USA-made flag kit hardware, HOA Architectural Brief, and Property Integrity Letter.
Do I need an ATU — will my radio's internal tuner work?
Yes, an external ATU is required. The VDA presents variable impedance across its operating range — that is how it covers 160-6M from a single feedpoint with no traps and no radials. Most internal tuners will not handle the full impedance range on every band.
An external ATU lives in one of two places, and both are right depending on your run. For a short feedline run, a desktop ATU at the radio is the simpler path — it stays warm and dry indoors and you can hear it tune. For a longer run, a weatherproof remote ATU at the antenna base keeps the match close to the feedpoint; the LDG RT-100 is a low-cost 125W fit for that job, and $25 comes off it automatically when it rides in the same cart as the antenna.
Note that all ATUs carry a reduced power rating for digital modes (FT8, Winlink, JS8Call) due to 100% duty cycle heat loading — check your tuner's digital rating before running full power on those modes. Running high power? The antenna handles the full legal limit on every band — the tuner is the only ceiling, and higher-power ATU options are on the tuner shelf.
How difficult is installation? How long does it take?
Most operators are on the air in under an hour. Dig a post hole, build the antenna sections (15-30 min), drop it in, run coax, connect the ATU. All stainless hardware comes pre-fastened — no loose hardware to lose in the grass.
Assembly documents at Setup and Manuals. Questions during 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. A customer's antenna fell in a severe ice storm — we sent a replacement immediately. 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 DXF24 Ships Free in the USA and Canada.
Scroll up and add it to your cart — or call and talk it through with us first. We enjoy talking radio, and we would rather you order the right height than the nearest one.
435-200-4902
Ham Radio is fun again! Pass it on... 73, The Greyline Performance Team · Sun Valley, Idaho · 435-200-4902