The LDG AT-600ProII is a general purpose automatic tuner intended for use with midsize amplifiers with up to 600 watts output on SSB or CW from 1.8 – 54 MHz.

Like most LDG tuners it operates automatically, beginning a tuning cycle whenever the SWR exceeds a preset limit. To protect its circuitry it will not tune at power levels above 150 watts; bypass your amplifier (or place it in Standby) to complete a tuning cycle using only the exciter.

It has a large, easy to read bar-graph wattmeter that show forward and reverse power,as well as an SWR meter.

It features two output connectors so you can easily switch between two antennas. There are 2,000 memory locations for each antenna, allowing nearly instant returning frequencies you’ve used before.

It will tune from 1.8 to 54.0 MHz continuously, and will match Yagis, dipoles, inverted-Vs, slopers, or virtually any coax-fed antenna from 6 to 1000ohms impedance (16 – 150ohms on 6 meters). Longwires or antennas fed with ladder line require an external balun, not included.

All LDG tuners come with a two year warranty, and LDG’s legendary customer service.

Key Features/Specifications

• Optional M-600 4.5 inch analog meter.
• 4,000 memories for instantaneous band changing
• Two position antenna switch with memories for each position
• Tuning time: 0.5 to 6 seconds full tune, 0.1 second memory tune
• Tunes 6 to 800 ohm loads (16 to 150 ohms on 6M)
• Includes DC power cable.
• Power requirements: 11 to 16 volts DC at 750 mA max during tuning
• Dimesions: D-10.5xW-8.5xH-2.5inches
• Weight: 3 lbs