Note
The Z-11pro was designed as a significant upgrade to the original Z-11, offering a higher power handling capability of 125 watts and a larger memory capacity for storing tuning frequencies. It was eventually replaced by the Z-11ProII, which hit the market in 2010.
The Z-11Pro provides fully automatic, any-mode antenna tuning across the entire HF range plus 6 meters at power levels to 125 watts. It will tune dipoles, verticals, Yagis or virtually any coax-fed antenna. It will match an amazing range of antennas and impedances. The Z-11Pro is designed with battery-powered operation in mind; it uses little power while tuning, and with its latching relays, uses essentially no power in standby.
Enhanced tuning algorithms provide fast, precise and consistent tuning. Automatic tuning is available during transmission, even SSB, and user-settable options are accessible from the front panel. The LEDs show SWR and readouts of internal states and settings. LDG's "3 D" memory provides virtually instant memory tuning for up to four different antennas.
The Z-11Pro has no power switch. It automatically powers up whenever RF is present or a button is pressed, and after tuning, automatically enters a “deep sleep” state in which it draws only 25 microamps, effectively off. The tuner will automatically "wake up" the next time a tuning cycle begins, a button is pressed or when an automatic tuning cycle is needed. The latching relays hold the tuned configuration indefinitely, even while DC power is completely removed.
Tuning memories are stored indefinitely in EEPROM memory.
The Z-11Pro has a total of 8,000 3-D frequency memories. There are 2,000 memories for each of four separate antennas. When you transmit on or near a previously tuned frequency, you can use “Memory Tune” to reset the tuner in only a fraction of a second. The process of storing tuning settings in memory is completely automatic; the Z-11Pro “learns” as you use it, adapting itself to all of the bands and frequencies you use.
Note: While LDG says that the Z-11pro was "designed with battery powered operation in mind," it does not come with an internal battery holder installed. Operation with batteries requires a relatively simple user modification. For battery operation, six or eight AAA or AA cells are required. A single 9-volt battery is not recommended.
Note: 125 watts is the absolute maximum rating. The tuner will be damaged if that power level is exceeded.
Specifications
– 125 watts SSB and CW peak power, 100 watts digital
– Easy to read LEDs indicate SWR and status
– 8000 "3-D" memories for instantaneous frequency or band changing
– Tuning time: 0.1 to 4 seconds full tune, < 0.1 second memory tune
– Built in frequency counter for memory operation
– Frequency coverage: 1.8 to 54.0 MHz.
– Tunes 6 to 1000 ohm loads (16 to 150 ohms on 6M), 6 to 4000 ohms with optional 4:1 Balun (LDG RBA-4:1)
– 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
– Interfaces for Icom and Yaesu included
Microprocessor: 68HC11
Power requirements: 8 to 16 volts DC at 300 mA max during tuning, 25 uA idle
