Artisan HF Antennas, Built by Hand in the Mountain West | Greyline Performance

About Greyline Performance

Artisan-Built HF Antennas. Sun Valley, Idaho.

Greyline Performance is an artisan manufacturer of HF vertical dipole antennas, based in Sun Valley, Idaho, and built by hand, one at a time, in the Mountain West. The antennas go to amateur radio operators, EmComm groups, research programs, and agency communications programs that need real performance from real-world installations: HOA lots, rooftop sites, waterfront properties, government facilities. The work is small-batch. The physics is published. The buyer is an operator.

What We Make

Five Heights. Two Product Lines. One Architecture.

Every Greyline antenna is an off-center fed vertical dipole. Elevated feedpoint, working as a self-contained circuit rather than against a buried radial system. Five core heights: 12, 16, 20, 24, and 28 feet. Two product lines: the DXF series styled as a residential flagpole for HOA installations, the DXV series as a bare vertical for rooftop, open-yard, and commercial sites. Every height works every band, 160 meters through 6 meters, from a single feedpoint with an external tuner.

Construction is 6061-T6 aircraft-grade aluminum, 2-inch outer diameter, with fiberglass insulators and stainless steel hardware throughout, and 316 marine-grade kits for coastal sites. Every wind rating is calculated against the ASCE 7-10 engineering standard and is height-specific: the 12-foot model carries the highest rating, the 28-foot the lowest. The numbers are published on each product page. Each antenna ships in 4-foot sections with the couplers already bolted on by design, so there is no loose hardware: bagged, boxed, and ready for the post hole.

The Artisan Standard

Greyline antennas are not pulled from a factory line. Each one is assembled by hand in a small machine shop, by people who have built them for years. Tolerances are checked against spec. The feed system is tested before the antenna ships. The shipping container is built around the antenna, not the other way around.

This is the trade-off the buyer makes: longer lead times during peak season, no flash sales, no race-to-the-bottom pricing. In return: an antenna that arrives properly built, performs as specified, and stands up under weather for the duration of the 7-year structural warranty, or longer. The oldest Greylines in the field are now over a decade old. They are still on the air.

We build what we would put up at our own QTH. Then we ship that.

The Operator Behind the Company

Jon, KL2A

Greyline's founder is Jon KL2A, CWops #77. Born and raised in Alaska, taught the Morse code at age seven by his grandfather (W6RST, W7JXY), and licensed at thirteen in 1984, with Elmers including KL7Y, K7SS, and the PJ1B A-team of the 80s-90s. Four decades of CW and DX followed, under calls that read like a DX passport: KL7Y and VE7SV in the north; PJ1B, KP2A, VP5B, KP4AA and V4 and VP2V, and a fun win from ZF2B in the Caribbean; 4O/KL2A from Montenegro; A5A from Bhutan; S21YX and YZ Bangladesh; 9K2HN from Kuwait; CT9M from Madeira twice 2003-2004 for CQWW CW (very early 2BSIQ); KH7R (now KH6J) from Hawaii; N1V with Team USA at the 2014 World Radiosport Team Championship in Boston; and various Pacific DXpeditions, E51D North Cooks and the N5J Jarvis Island operation of 2024. Multiple #1 World contest finishes and a former ARRL 10M world record, independently verifiable on QRZ and in published contest databases.

Greyline started with a problem Jon faced at his own station. Burying 200 feet of radial wire was off the table. Putting up a tower was off the table. The choices were compromise the antenna or compromise the operating. Neither was acceptable.

The answer turned out to be the off-center fed vertical dipole. Elevated feedpoint. No radial field required. Every band from 160 through 6 with an external tuner. Permanent, maintainable, and handsome enough to stand in the front yard as a flagpole, because the pole itself is the antenna. The first builds went to fellow operators. Word moved. The product line followed.

Jon still tests what he sells. With every height to swap between, his usual at home is a 32-foot with a 9-to-11.5-foot whip on top — and when 10 meters opens, he likes the 24-foot.

Why We Cite Our Sources

The Shelf We Read From

Antenna marketing is full of unsupported claims. Greyline's standing rule is simple: if a claim cannot be traced to a named published source, it does not run. The physics references behind every Greyline design decision are public: Robert Zavrel W7SX ( Antenna Physics: An Introduction , ARRL 2020), John Kraus W8JK ( Antennas , McGraw-Hill), Rudy Severns N6LF for ground systems, Walter Maxwell W2DU for transmission lines, Roy Lewallen W7EL for the NEC modeling tools behind every gain figure we publish, and John Portune W6NBC, who put the no-radial vertical dipole in front of the amateur community and gave the plans away.

The full bibliography: physics, propagation, low-band, modeling, HOA zoning, lives at The Shelf We Read From . Every page on this site is built to stand up to those references.

Greyline RF Toolbox - Free for Ops

Tools an Operator Can Use Today

An artisan shows the tools alongside the work. Greyline's RF Toolbox is a growing set of free calculators built for operators: no login, no paywall, no email capture. The Feedline Loss Calculator shows you how much of your power actually reaches the antenna across coax types, lengths, and bands. The VDA Optimizer lets you configure any Greyline height-and-whip combination and see modeled gain on every band, the wind rating, and where each height earns its bonus. Built by hams. For hams. Pass them on.

Who Buys Greyline

The Operator Mix

The buyers are operators. DX hunters chasing band-fills. Contesters putting up the antenna they can keep up year-round. EmComm volunteers who need an HF antenna that survives the same weather event it has to communicate through. Returning hams coming back to the bands after long absences. New licensees putting up their first HF antenna. Operators behind HOA lines who were told they could not have HF at all.

The product is also deployed in government, research, and commercial communications programs: diplomatic facilities, defense contractors, state emergency operations centers, universities and field research programs, port and maritime sites, where a low-profile, low-maintenance HF antenna with published engineering matters more than the price tag. We do not name agencies, institutions, or installations. Agency inquiries are handled through a dedicated Agency Solutions channel .

Operators return regularly with on-air results: DXCC counts, contest scores, band-by-band reports. A selection of named-callsign operator stories is documented in our Field Reports and the Signal Report, and the verifiable contest and DX records of those operators can be checked independently on QRZ, in published contest databases, and on PSK Reporter.

The Company

Sun Valley, Idaho. Built in the Mountain West.

Greyline is based in Sun Valley, Idaho: Mountain Time, 7,000 feet of elevation, and a view of the Sawtooth Range. The antennas are built by hand in the Mountain West, led by a structural engineer who has been building Greylines for years. Aluminum tubing is sourced through American mills. Every antenna is built to spec, tested, and either shipped from inventory or scheduled into the next production run. Current lead time is always posted on the Order Status page .

Free shipping to the USA and Canada. We ship worldwide and do not mark up freight: you pay what the carrier charges us. Details on the Shipping page . Seven-year structural warranty on every antenna. Every document we publish, from install manuals to the HOA Architectural Brief, is in one place on Documents & Forms.

How to reach us

Phone: 435-200-4902 (Mountain Time). Best for technical questions, site-specific recommendations, lead time, and shipping discussions. Jon answers the phone.

Web: Contact form for written questions and order inquiries.

Ham Radio is fun again! Pass it on… 73, Jon KL2A · Greyline Performance · Sun Valley, Idaho · 435-200-4902