HOA Stealth Flagpole Antenna · 160–6M · No Radials · Made in USA
The DXF20 — The Most Popular. For Good Reason.
The DXF20 is the Greyline system most operators choose — the scale most people picture when they think residential flagpole, with the aperture to deliver strong performance on 40 and 80 meters. A decade of HOA installations. A property asset in every sense: commercial-grade construction, curb appeal that replaces the bird’s-nest wire problem, and HOA documentation included.
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.
Band Coverage
160–6M
All HF bands. One antenna.
Wind Rating (Flag Down)
90 MPH
ASCE 7-10 engineered. Flag-up: 60 MPH.
Guarantee
7 Years
Free shipping USA. Made in Sun Valley, Idaho.
⚑ Flag-Down Protocol
At 20 feet, the flag-up wind rating is 60 MPH. The 90 MPH flag-down rating is your ASCE 7-10 engineered structural number.
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 10 meters and 1/2λ on 12 meters — strong low-angle radiation favorable for DX propagation.
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.
Full Installation Guide →In the Box
Everything You Need. Nothing You Don’t.
Antenna System
- 20’ DXF Flagpole VDA Radiator
- RF Choke & Precision Feedline Hardware
- Ground Sleeve Kit
- Assembly Manual & Tuning Guide
HOA & Household
- USA-Made Flag Kit Hardware
- HOA Architectural Brief
- Property Integrity Letter (XYL & HOA ready)
- 7-Year Performance Guarantee
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.
| Model | Flag Down | Flag Up | Standard |
|---|---|---|---|
| DXF12 | 155 MPH | 100 MPH | ASCE 7-10 |
| DXF16 | 115 MPH | 75 MPH | ASCE 7-10 |
| DXF20 | 90 MPH | 60 MPH | ASCE 7-10 |
| DXF24 | 70 MPH | 50 MPH | ASCE 7-10 |
| DXF28 | 55 MPH | 35 MPH | ASCE 7-10 |
Ratings per ASCE 7-10. Lower flag during approaching weather per US federal flag protocol.
Take It Further
Upgrades That Actually Move the Needle
9’ DX Whip
Adds 9 feet of aperture for strong low-band gain improvement. Up to 3.5 dBi additional gain potential. Lightweight, stealthy.
View Whip →LDG RT-100 Bundle
100W weatherproof remote tuner at the feedpoint. DC over coax. One-button tuning 160–6M. Bundle and save.
View Bundle →No Flag Needed?
The DXV20 delivers identical VDA performance without flagpole hardware.
See the DXV20 →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.
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. Hand it over, let it do the work.
Neighbor & XYL FAQ →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
| Spec | Detail |
|---|---|
| Height | 20 feet |
| Band Coverage | 160–6M (all HF + 6M) |
| Design | VDA — Vertical Dipole Antenna, OCF |
| Power Handling | Legal limit — constrained only by ATU rating |
| Radials Required | None |
| Material | 6061-T6 Aircraft-Grade Aluminum + Fiberglass |
| Wind Rating (Flag Down) | 90 MPH — ASCE 7-10 |
| Wind Rating (Flag Up) | 60 MPH — ASCE 7-10 |
| Shipping | Free — USA. International rates at checkout. |
| Made In | Sun Valley, Idaho — USA |
| Guarantee | 7-Year Performance Guarantee |
Common Questions
Before You Order — Answered.
What’s the current lead time and availability?
We ship from stock — same or next business day when available. Peak season may carry 1–3 week queue. Current lead time 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 and an ATU. That’s it.
✓ VDA Radiator (your chosen height)
✓ RF Choke & Precision Feedline Hardware
✓ Ground Sleeve Kit — in-ground, tower, roof, deck, dock compatible
✓ Assembly Manual & 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’s how it covers 160–6M from a single feedpoint with no traps and no radials. Most internal tuners won’t handle the full impedance range on every band.
We recommend the LDG RT-100 remote ATU mounted at the antenna base — 125W, weatherproof, low cost, and a great fit for most operators. 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. The antenna itself handles any power and any mode without restriction. Antenna + ATU bundles →
Is the ATU bundle the best value?
Yes. Every antenna is available bundled with the LDG RT-100 at a discount versus buying separately. Free shipping USA. Shop all bundles →
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 →
Ham Radio is fun again! Pass it on... 73, The Greyline Performance Team · Sun Valley, Idaho · 435-200-4902