Capabilities Statement | Greyline Performance

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Capabilities Statement

Greyline Performance - HF Antenna Infrastructure

Section 889 compliant | FAR 52.204-24 compliant | Antennas built by hand in the USA

Based In

Sun Valley, Idaho

Field Experience

10+ Years

Coverage

1.5–54 MHz

Company Overview

About Greyline Performance

Greyline Performance designs and manufactures high-resilience HF antenna infrastructure for amateur radio operators, government agencies, research institutions, defense contractors, and emergency management organizations. Our VDA (Vertical Dipole Antenna) systems require no buried radial field, deploy on any surface, and operate across 1.5–54 MHz from a single feedpoint — the full government HF range and every amateur band from 160 through 6 meters. Systems are in active service with government and diplomatic facilities, research programs, state emergency operations centers, and defense contractors. Greyline is based in Sun Valley, Idaho; the antennas are built by hand in the Mountain West, with aluminum sourced through American mills. Component origin documentation is furnished on engagement.

On customer identification: Greyline does not name agencies, institutions, or installations in any public or promotional material, and does not provide customer references that identify them. Operators who require a discrete profile in the field are entitled to the same discretion from their vendor.

Core Competencies

What We Deliver

Low-Profile HF Systems

Antenna systems presenting as standard commercial-grade flagpoles. The pole itself is the antenna, so there is nothing added to see: no stubs, loading coils, or radial wires. 1.5–54 MHz from a single feedpoint. Appropriate for installations that call for a low visual profile.

Zero-Radial VDA Physics

Off-center-fed Vertical Dipole Antenna design. Return current flows through the lower element rather than through a buried radial field. Deployable on rooftop, concrete, asphalt, or frozen soil. Performance far less dependent on ground conductivity than a quarter-wave vertical.

Mission-Grade Construction

2-inch 6061-T6 aluminum alloy, fiberglass insulators, stainless hardware throughout, with 316 marine-grade kits for coastal and saltwater sites. ASCE 7-10 wind load engineered. 7-year structural warranty. No traps, no coils, no failure points under sustained digital operation.

Field And Research Deployment

No radial installation, no ground system preparation. Single ground sleeve. Suited to sites where a conventional ground system is impractical or impossible: rock, permafrost, sand, rooftops. A broadband radiator, agnostic to waveform: ALE, STANAG 4538, MIL-STD-188-141B, and all digital HF modes.

Technical Specifications

System Performance Parameters

Parameter Specification
Frequency Coverage 1.5–54 MHz from a single feedpoint, with an antenna tuner rated for the range (the LDG RT-100 covers 1.8–54 MHz; for coverage from 1.5 MHz, specify a tuner rated there). Includes all amateur bands 160M–6M.
Power Handling Full legal limit at 100% duty cycle (radiator). System power constrained by the selected ATU rating.
Antenna Type OCF Vertical Dipole Antenna (VDA), no radials required
Primary Material 2-inch 6061-T6 aluminum alloy, American mill stock
Hardware Stainless steel throughout; 316 marine-grade kits for coastal sites
Wind Load Rating ASCE 7-10 engineered; published per height, flag up and flag down, from 35 to 155 MPH
Deployment Surface Ground, rooftop, concrete, asphalt, frozen soil
Mode Compatibility Waveform-agnostic broadband radiator: ALE, STANAG 4538, JS-001, MIL-STD-188-141B, FT8, Winlink, VARA, voice, CW
Available Heights 12, 16, 20, 24, 28 feet; 29–37 feet with the 9' whip; custom configurations available
Warranty 7-year structural warranty

Differentiators

Why Greyline

No Radials

Deployable on any surface without ground system preparation. No buried wire, no trenching, no radial field to maintain.

A Decade Of Field Data

Ten years of continuous field service across every climate and terrain, from coastal salt air to high desert to frozen ground.

Supply Chain Secure

Antennas built by hand in the USA. No covered telecommunications equipment. FAR 52.204-24 compliant. Section 889 compliant.

Procurement Contact

Government & Agency Liaison

Procurement Credentials

Section 889: Compliant

FAR 52.204-24: Compliant

Antennas: built by hand in the USA

Registration details and component origin documentation furnished on engagement

Jon Kimball, KL2A · Founder, Greyline Performance · 435-200-4902