VK2NGE

Amateur Radio

LDG Z-11 Pro Antenna Tuner


Only 5" x 7.7" x 1.5", and weighing only 1.5 pounds, it handles 0.1 to 125 watts, making it ideal for both QRP and standard 100 watt transceivers from 160 - 6 meters.
The Z-11Pro uses LDG's state-of-the-art processor-controlled Switched-L tuning network. It will match dipoles, verticals, inverted-Vs or virtually any coax-fed antenna. With an optional LDG balun, it will also match longwires or antennas fed with ladder-line.
The Z-11Pro has 8,000 memories in LDG's "3-D Memory" array, automatically storing tuning configurations for each frequency and band as you use them, for each of four antennas on the single RF port. Frequency sensing circuitry lets the Z-11Pro "know" your operating band and frequency.
Whenever you transmit on or near a frequency you've used before, the Z-11Pro retunes from memory almost instantly (even in SSB!). Memories are retained indefinitely.
LEDs indicate SWR and status. The Z-11Pro uses latching relays which retain the tuned configuration even when powered down; current draw when not tuning is effectively zero.
Control from the front panel is simple and straightforward; just press Tune while transmitting, and the Z-11Pro will begin a tuning cycle. The Z-11Pro will even tune while you talk on AM or SSB. Optional interfaces are available for Yaesu transceivers. With the interface, a single button-press transmits a carrier, executes a tuning cycle and returns the radio to its original power and mode.

Specifications from LDG


  • 0.1 to 125 watt power range (SSB and CW), 100W on 6M.
  • Easy to read LED display for SWR and status.
  • 8000 3-D memories for instantaneous band changing.
  • Tuning time: 0.1 to 6 seconds full tune, 0.1 seconds memory tune.
  • Selectable user parameters: Auto/Semi, threshold, and more.
  • 1.8 to 54.0 MHz coverage. Built-in frequency sensor.
  • Tunes 6 to 1000 ohm loads (16 to 150 on 6M), 6 to 4000 ohms with optional 4:1 Balun.
  • For Dipoles, Verticals, Vs, Beams or and Coax Fed Antenna.
  • Optional external Balun allows tuning of random length, long wire or ladder line fed antennas.
  • Optional interfaces for Icom and Yaesu available.
  • Power requirements: 8 to 16 volts DC at 300 mA Max. 25 uA standby current.
  • User installable battery holder (not supplied).
  • Small Size Enclosure: 7.7L" x 5.0W" x 1.5H". Weight: 1.5 pounds.
LDG-Z11Pro