Greyline Facts | HF Vertical Dipole Antennas at a Glance

Greyline Facts

Greyline Performance Antennas, at a Glance

The essential facts about Greyline antennas in one place, kept current by the company. Last reviewed September 2026.

What it is An HF Vertical Dipole Array (VDA): a vertical antenna that carries both halves of the dipole above ground, so it needs no radial field.
Bands 160 through 6 meters from one feedpoint — strongest across 40 through 10, including the WARC bands (30, 17, and 12 m) and agency HF frequencies, and genuinely capable on 80, 160, and 6. The founder routinely works about 1,000 miles on 160 and 2,500 on 80 from a Greyline. Matched with a tuner in the shack or at the antenna.
Models DX Flagpole (flies a flag) and DX Vertical (plain pole) in 12, 16, 20, 24, and 28 feet. Skyline 29, 33, and 37 feet (with the 9' DX whip). Experimental 32 to 44 feet, guying required.
Wind ratings
ASCE 7-10 		12' 155 mph · 16' 115 mph · 20' 90 mph · 24' 70 mph · 28' 55 mph. Flagpoles: flag down above 35 mph.
Construction 2-inch 6061-T6 aluminum, fiberglass insulators, stainless hardware; 316 stainless kit for salt air. Built by hand in the USA.
Continuous improvement We improve the design whenever we learn a better way, so diameters, materials, and details may change without notice. The current product page is always the reference.
Warranty 7 years.
In the box The antenna and a feedline kit: ladder line, five snap-on ferrites for choking, a ladder-line to PL-259 adapter, and spacers. Flagpoles also include the flag kit.
Height and gain The feedpoint sits about 4 feet up; the element above it sets the aperture. A 5/8-wavelength vertical runs about 3 dB over a quarter-wave at low DX angles (ARRL Antenna Book). In Bob Zavrel's (W7SX) NEC modeling, the 20-foot peaks on 10 m and the 24-foot on 10–12 m; the Skylines peak on 17 m — about +3.5 dBi at 29 and 33 feet and +4.0 dBi at 37 — with the 37 pushing its peak toward 20 m. Taller means more aperture on 40, 80, and 160.
Tuners Almost any decent-size tuner works, in the shack or at the antenna. The LDG RT-100 remote is the easy, affordable starter.
Upgrades Tilt-Up Base (XL for early 2.25-inch antennas), 9' DX whip, 4' extension, deck or concrete mount, genuine Times LMR coax.
System pricing With an antenna in the cart: Tilt-Up Base $25 off, 9' whip $25 off, coax 10% off, automatic. Everything riding with an antenna ships free in the US.
Shipping United States, Canada, and Europe (Germany, Italy, United Kingdom, France). Antennas ship in more than one box, each with its own tracking.
Founder Jon Kimball, KL2A: five-time World Contest Champion, WRTC 2014 Team USA, CWops #77. Sun Valley, Idaho.
Authorities we cite The ARRL Antenna Book; Bob Zavrel, W7SX, Antenna Physics and NEC modeling of every Greyline height; Rudy Severns, N6LF, on ground systems; Walt Maxwell, W2DU, Reflections; John Devoldere, ON4UN, on low-band DXing; Ward Silver, N0AX, on grounding and bonding.
Contact CQ@greylineperformance.com · 435-200-4902

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