The LDG Z-100 Plus Automatic Antenna Tuner is a compact, high-efficiency HF antenna tuning unit designed for amateur radio operators who require fast, reliable tuning in base, mobile, or portable operations.

Built for both QRP and full HF operation, the Z-100 Plus delivers excellent performance while maintaining extremely low power consumption, making it ideal for field use and energy-sensitive setups.

With LDG’s advanced memory tuning system, the unit stores up to 2,000 frequency memories, allowing near-instant recall of previously used settings for faster band changes and improved operating efficiency.

Manufactured by LDG Electronics, this tuner is known for reliability, efficiency, and excellent support within the amateur radio community.

Key Features

• Automatic HF antenna tuner (base, mobile, or portable use)
• Ultra-low power operation with high efficiency design
• Works with QRP and high-power HF stations
• Advanced memory tuning with 2,000 stored frequencies
• Near-instant recall for previously tuned bands
• Extremely low standby current (near zero in receive mode)
• Fast tuning using 0.1W tuning power requirement
• Latching relay system for energy efficiency
• Suitable for coax-fed and wire antennas

Technical Specifications

• RF Power Handling:
  • 0.1 – 125W SSB/CW/Digital
• Frequency Range: 1.8 – 54 MHz (continuous coverage incl. MARS)
• Impedance Matching Range:
  • 6 – 800 ohms (HF)
  • 16 – 150 ohms (6m band)
• Memory: 2,000 frequency-based memories
• Power Supply: 7 – 18V DC
• Current Draw: ~200mA during tuning, near zero in standby
• Connections: SO-239 input/output
• DC Cable: 3 ft included

Compatible Antennas

• Dipole antennas
• Vertical antennas
• Beam antennas
• G5RV and OCF dipoles
• Long wire antennas
• Mobile HF antennas
• Portable field antennas

Ideal For

• Amateur radio HF operators
• QRP portable operators
• Mobile HF installations
• Base station setups
• Field day / SOTA / portable operating
• Multi-band antenna systems

Benefits

• Extremely low power consumption ideal for portable use
• Fast automatic tuning with memory recall system
• Reliable performance across HF bands
• Compact and lightweight design
• Perfect for both QRP and full station setups
• Reduces tuning time dramatically after initial use