HOA Flagpole Antenna + Remote ATU Bundle · 160–6M · No Radials · Made in USA
The DXF28 Bundle — Complete System. On the Air Fast.
The DXF28 is Greyline's most capable flagpole antenna — the choice for operators who demand every dB the design can deliver. At 28 feet, the VDA achieves full 5/8λ geometry on 15 meters, delivering up to 3.5 dBi of gain potential on that band. The pattern angle rises slightly on 12 and 10 meters, but real-world DX performance on those bands remains strong — going taller is worth it when height clearance allows. A property asset that raises curb appeal, flies a full-size flag, and satisfies any HOA board. This bundle pairs it with the 125W LDG RT-100 tuner — you supply coax.
From the Founder
"I run a 32-foot at home and work Africa and Asia regularly on 10 through 30 meters. Real gain across every one of those bands — from +1 dBi on 30M up to +3.5 dBi on 17M. Go as tall as your lot allows — the multiband improvement is real."
— Jon KL2A · Founder, Greyline Performance
Band Coverage
160–6M
All HF bands. One antenna. One tuner.
Wind Rating (Flag Down)
65 MPH
ASCE 7-10 engineered. Flag-up: 55 MPH.
Guarantee
7 Years
Free shipping USA. Sun Valley, Idaho.
What's in the Box
The Complete System.
Antenna System
- 28' DXF VDA Radiator
- RF Choke & Precision Feedline Hardware
- Ground Sleeve Kit
- Assembly Manual & Tuning Guide
- 7-Year Performance Guarantee
- USA-Made Flag Kit Hardware
- HOA Architectural Brief
- Property Integrity Letter
LDG RT-100 Remote ATU
- 125W, 160–6M — check digital duty cycle rating
- Weatherproof — base-mount rated
- DC powered over coax — no extra cables
- One-button tuning, memory recall
- Works with any transceiver
Field Report — Virginia
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. " 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
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 full 5/8λ geometry on 15 meters — up to 3.5 dBi gain potential on that band. Strong low-angle radiation on 20M and above. Best low-band aperture in the DXF lineup.
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.
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.
Full Installation Guide →HOA & XYL Approved
Every DXF Bundle Ships with the Approval Toolkit
For Your HOA Board
Architectural brief, wind ratings, approval letter — ready to print and submit.
HOA Approval Toolkit →For Your XYL & Neighbors
Appearance, safety, property values — addressed directly.
Neighbor & XYL FAQ →Feed System Note
Balanced VDA — the LDG RT-100 is pre-configured for base-mount. See the Tuner & Balun Configuration Guide →
Specs & Shipping
| Spec | Detail |
|---|---|
| Antenna Height | 28 feet |
| Antenna Type | DXF — Flagpole VDA, OCF |
| Band Coverage | 160–6M (all HF + 6M) |
| ATU | LDG RT-100 — 125W, 160–6M, base-mount, DC over coax |
| Radials Required | None |
| Material | 6061-T6 Aircraft-Grade Aluminum + Fiberglass |
| Wind Rating (Flag Up) | 55 MPH — ASCE 7-10 |
| Wind Rating (Flag Down) | 65 MPH — ASCE 7-10 |
| Shipping | Free — USA. International rates at checkout. |
| Made In | Sun Valley, Idaho — USA |
| Guarantee | 7-Year Performance Guarantee |
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. Sheltered installation recommended at this height.
At 28 feet, the Greyline VDA presents 4.67 square feet of wind surface. At this height the moment arm is at its longest — every additional square foot of projected area translates directly into greater base bending stress and greater dynamic fatigue loading on every gust cycle. The graduated wall construction is not a cost-saving measure. It is the correct engineering response: maximum material where bending stress peaks, minimum mass where it only adds dynamic load.
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.
The antenna in this bundle ships from our current artisan production run — hand-built, individually fitted and finished, with threaded metal-to-metal section marriages. Same engineering, same guarantee, same performance. The LDG RT-100 ships as matched system.
Limited Edition · Artisan Production Run
Hand-built antenna. Production-matched tuner. The complete system, built to last.
Same 6061-T6 aircraft aluminum. Same ASCE 7-10 wind ratings. Same 7-year guarantee. Threaded transition sections machined directly into the metal — self-aligning, no through-bolting, less total weight. Paired with the LDG RT-100 at the feedpoint where the tuner belongs.
Manufacturing expanding. Things coming this year. Watch this space.
Common Questions
Before You Order — Answered.
What's the current lead time and availability?
Each antenna is hand-built to order during our current artisan production run — typical lead time runs a few weeks, returning to ship-from-stock as the run completes. Current lead time is always posted on our Order Status page → Call 435-200-4902 for a specific ship date.
How long does shipping take once it leaves Sun Valley?
USA shipping is free. Ground transit runs 2–5 business days from Sun Valley, Idaho. Tracking sent at shipment. International rates calculated at checkout.
What's included — do I need to source anything separately?
Everything to assemble and mount is in the box. You supply coax. That's it.
✓ VDA Radiator (your chosen height)
✓ RF Choke & Precision Feedline Hardware
✓ Ground Sleeve Kit — in-ground, tower, roof, deck, dock compatible
✓ LDG RT-100 Remote ATU — 125W, weatherproof, base-mounted
✓ Assembly Manual & Tuning Guide
✓ 7-Year Performance Guarantee
Complete system — antenna and ATU included. You supply coax only.
The bundle includes the LDG RT-100 — what power level does it handle?
The LDG RT-100 mounts at the antenna base, powered over coax — no extra cables. 125W, 160–6M, weatherproof. Like all ATUs, it carries a reduced power rating for 100% duty cycle digital modes — check the spec sheet for your operating style. Running above 125W? Source a higher-power ATU for your needs. The antenna handles any power level and any mode without restriction.
Are there other bundle configurations available?
The standard bundle pairs your antenna with the LDG RT-100 (125W). For higher power requirements, contact us — we can configure bundles with the higher-power ATU or equivalent. Contact us →
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 & 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. No questions asked. 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 — 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