LDG’s products offer a non-pro-rated Full Two Year Transferable Warranty. Free return shipping on all warranty repairs.

Zero Power Tuners



LDG’s “zero power” tuners use only microwatts of DC power in standby, making them ideal for portable or mobile use. They can easily be powered by batteries, and are compact and lightweight. You can easily use them in you Go-Box, or backpack portable.

Items are available from your favorite HAM Radio Dealers.

Z-11ProII

  • Description

    The LDG Z-11ProII is a small, low-cost automatic tuner suitable for any amateur purpose, whether base, mobile or portable. It handles up to 125 watts SSB or 50 watts Digital, but requires only 0.1 watts to tune, making it ideal for QRP operation.


    Like most Generic LDG tuners, the Z-11ProII can operate automatically, beginning a tuning cycle whenever the SWR exceeds a preset limit. It also features LDGs advanced memory tuning, providing 2,000 memory locations; when tuning near a previously used frequency it will recall the settings for nearly instant tuning. It learns your favorite frequencies and bands as you use it. You can also start a tuning cycle manually whenever necessary.


    The LDG Z-11ProII has features found in larger LDG tuners, such as dedicated buttons for manually fine-tuning the match. This can be useful when tuning an antenna far from resonance.


    The LDG Z-11ProII requires very little electrical power; when not tuning the current draw is negligible. An internal battery holder for eight AA batteries will operate the tuner for a year of normal use. This feature makes the Z-11ProII especially suitable for mobile or portable operation.

    All LDG tuners come with a two year fully transferable warranty, and LDGs legendary customer service. Contact your favorite LDG dealer to order.

  • Specs

    • Transmit Power Limits: SSB: .1 to 125 watts SSB; CW: 100 watts; FT-8: 75 watts; PSK and digital modes: 50 watts; 6 meters: 50 watts.
    • Latching relays for ultra-low power operation.
    • 2,000 memories for instantaneous frequency and band changing.
    • 1.8 to 54.0 MHz coverage. Built-in frequency counter for memory operation.
    • Tunes 6 to 1000 ohm loads (16 to 150 on 6M), 6 to 4000 ohms with optional 4:1 Balun.
    • Easy to read LEDs indicate SWR and operating status.
    • For Dipoles, Verticals, Vees, Beams, or any Coax Fed Antenna.
    • Optional external Baluns allow tuning of random length, long wire, or ladder line fed antennas. Click here for details.
    • Optional radio interface cables are available. Click here for details.
    • DC power cable included.
    • 12-volt internal battery pack included for 8 AA batteries. Batteries are not included.
    • Power Requirements: 7 to 16 volts DC at 300mA max during tuning. 25 µA idle current.
    • Dimensions: 8.25” L x 5.0” W x 1.75” H.
    • Weight: 1 pound, 5 ounces (without internal batteries).
  • Docs

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