Introduction
Congratulations on selecting the LDG Z-100 tuner. The Z-100 provides fully automatic antenna
tuning across the entire HF range for less than the cost of many manual tuners. It will tune
dipoles, verticals, Yagis or virtually any coax-fed antenna. It will match an amazing range of
antennas and impedances, far greater than some other tuners you may have considered. Also, it
consumes very little power making it ideal for battery-powered operations.
LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories near
the nation’s capitol, LDG continues to define the state of the art in this field with innovative
automatic tuners and related products for every amateur need.
Jumpstart, or “Real hams don’t read manuals!”
Ok, but at least read this one section before you transmit:
1. Connect your Z-100 to a source of 7 - 18 volts DC @ 300mA via the 2.5 by 5.5 mm
power jack on the back (center positive).
2. Connect the antenna jack on your transceiver to the Transmitter jack on your Z-100
tuner using the coaxial cable jumper.
3. Connect your antenna coax lead to the Antenna jack on the back of your Z-100.
4. Power up your transceiver and select the desired operating frequency.
5. Select AM, FM, CW or PKT mode, then key down to transmit a carrier
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6. Press and hold the Tune button on the front panel of your Z-100 until the red LED
comes on, then release; a tuning cycle will start and the red LED will come on.
7. Wait for the tuning cycle to end (red LED goes out, 1 – 6 seconds), and then unkey.
8. Reset your transceiver to your desired operating mode.
9. You’re ready to transmit.
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You can tune while transmitting up to 125 watts if your transceiver has a “roll-back circuit” to protect it
from high SWR. If it does not have a roll-back circuit, limit power when tuning to 10 watts.
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