U20534 Used ACOM 04AT Automatic Antenna Tuner & Switch with Outdoor Mounting Cover

U20534 Used ACOM 04AT Automatic Antenna Tuner & Switch with Outdoor Mounting Cover

This pre-owned ACOM 04AT automatic antenna tuner and switch is in great overall condition, exhibiting only minor handling nicks and light surface marks on the black metal chassis. The heavy-duty brushed aluminum terminal faceplate is clean, with crisp labeling, solid SO-239 RF connectors, an intact ground stud, and clean fuse holders. The heavy molded white outdoor weather protection cover, mounting brackets, mast hose clamps, and installation hardware are clean and well preserved. It comes complete in its original ACOM factory box.

The ACOM 04AT is a premium remote automatic antenna tuner and four-port antenna switch designed specifically for seamless operation with modern ACOM solid-state amplifiers (including the ACOM 1200S, 700S, 600S, and 1400S). Covering 1.8 to 54 MHz (160 meters through 6 meters), it is engineered to be installed either directly inside the shack or outdoors right at the antenna feedpoint using the included weather-protection hood. Operating remotely via the single main coaxial transmission line—which simultaneously carries RF, 26V DC power, and digital control data from the amplifier—it eliminates the need for separate external control cables. It automatically matches complex antenna impedances across all HF bands and 6M, handles full legal-limit power ratings matching its companion amplifiers, and routes signals between four independent antenna outputs.

Condition

• Cosmetic Condition: Great pre-owned condition. The main tuner chassis shows minor handling nicks and light rub marks on the outer black painted finish, while remaining structurally solid.

• Connection Faceplate: The brushed aluminum connector panel is clean; all five SO-239 coaxial jacks (Input and Ant 1–4), ground post, and service access covers are in excellent shape with sharp threads.

• Cover & Mounting Hardware: The molded outdoor weather protection hood is clean and free of cracks or weathering, and the metal mast/wall mounting brackets and stainless hose clamps are pristine.

• Packaging: Includes the original ACOM factory shipping box.

Key Features

• Broad 1.8–54 MHz Tuning: Automatically tunes and matches antennas across all amateur HF bands plus 6 meters.

• Remote Outdoor or Shack Installation: Can be operated on a desk or mounted outdoors near the antenna array using the UV-resistant weather hood.

• Single-Coax Power & Control: Transmits RF power, 26V DC operating voltage, and bi-directional digital telemetry directly over the primary coaxial cable line.

• Integrated 4-Port Antenna Switch: Allows switching between four separate coaxial-fed antennas directly from the amplifier control interface.

• Seamless ACOM Integration: Communicates with ACOM solid-state amplifiers for automated, coordinated band changes and non-volatile tuning memory storage.

• Non-Volatile Tuning Memories: Retains tuning solutions across multiple frequency segments per antenna port for instantaneous frequency recall.

• Rugged Weatherproof Design: Engineered for outdoor survival with a dedicated weather protection hood and comprehensive ground safety termination.

What's Included

• ACOM 04AT Automatic Antenna Tuner & Switch Unit

• Molded Outdoor Weather Protection Cover (Hood)

• Heavy-Duty Mounting Bracket Set

• Adjustable Stainless Steel Mast Hose Clamps

• Hardware & Fasteners Box

• Original ACOM Factory Packaging

Comes With Our 90-Day Warranty!

Serial Number: 160160

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