Collection: Remote Antenna Tuner | ATU | Automatic Antenna Tuners | Autotuner

Remote & Shack ATU · 160–6M · Greyline-Validated

Every Greyline VDA Requires an ATU. Here's Why — and Which One.

The Greyline VDA is an off-center-fed vertical dipole. It presents a variable impedance across its operating range — which is exactly how it covers 160 through 6 meters from a single feedpoint with no traps, no coils, and no radials. That variable impedance is a feature, not a bug. It's what makes the design work. An ATU is the other half of the equation — it resolves the match, presents your radio a clean 50Ω load on every band, and lets the VDA do what it was built to do.

Your transceiver's internal tuner won't cover the full range on every band. An external ATU will. Both remote base-mount and shack-side configurations work — the physics of each are different, and the right choice depends on your installation. We'll give you the honest breakdown below.

The Core Decision

Remote Base Mount vs. Shack-Side — What the Physics Actually Say

For a detailed technical breakdown of both approaches, see the Remote vs. Shack Tuner Guide →

Greyline Recommended · Remote ATU

LDG RT-100 — The One We Install.

125W weatherproof. Mounts at the antenna base. Powered over coax via the included RC-100 controller — no separate power cable to run. Tunes 1.5 to 54 MHz. 2,000 memory locations for near-instant band changes on familiar frequencies. Handles 4 to 800 ohm loads — covers the full impedance range of the Greyline VDA across all bands.

Other ATUs

Will My Tuner Work?

Almost certainly yes. The Greyline VDA works with any ATU that covers the impedance range the antenna presents on your target bands. Some folks use tuners the size of a football with great success so the larger boxes are an easy "Yes." Use the impedance range specification of any ATU as your guide — if it covers 4 to 800 ohms or better across 160–6M, it will work. Most quality external tuners meet this standard.

Military and government agencies, EmComm organizations, NGOs, and professional operators run Greyline VDA systems with a wide variety of ATUs — both remote and shack-side configurations. The antenna doesn't care what brand is doing the matching. It cares that the match is being made.

Questions about a specific tuner and the Greyline VDA? Call us directly — 435-200-4902. We've seen a lot of combinations in the field and we'll give you a straight answer.

Best Value

Buy the Antenna and ATU Together — Save on Both.

Every Greyline bundle pairs a DXF flagpole or DXV vertical with the LDG RT-100 at a meaningful discount versus buying separately. Pre-matched, pre-validated, guaranteed to work together. One order, one shipment, on the air in under an hour.

Ham Radio is fun again! Pass it on... 73, The Greyline Performance Team · Sun Valley, Idaho · 435-200-4902 · Contact Us