5
Installing and Connecting the Z-100A tuner
The Z-100A tuner is designed for indoor operation only; it is not weather proof / water
resistant. If you use it outdoors (Field Day, for example), ensure it is properly protected
from rain, dust, etc.
The Z-100A is designed for use with coax-fed antennas. If operating with long-wire or
ladder-line-fed antennas, an external balun is required. The LDG RBA-4:1 or RBA-1:1 is ideal,
depending on the antenna and transmission line used.
1.
Make sure your Icom radio is turned off.
2.
Connect the HF/50 MHz antenna jack on the transceiver to the “TX” jack on the Z-
100A, using the supplied 50Ω jumper.
3.
Connect a 50Ω coax antenna feedline to the “ANT” jack on the Z-100A.
4.
Connect one end of the supplied radio interface cable to the tuner port on the
back of your radio.
5.
Connect the other end of the supplied radio interface cable to the “Radio” jack on
the rear of the Z-100A.
6.
Turn on the radio.
7.
Select the desired operating frequency and mode.
8.
Push and hold the TUNER/CALL button on the front of the radio for one second
(until the Tuning LED comes on), then release. The transceiver will automatically
key up with a minimal amount of power, and the Z-100A begins its’ tuning cycle.
At the end of this tuning cycle, the original mode and power level is restored.
9.
You’re now ready to operate!
Most of the time the Z-100A’s memory tuning will allow a good match to be found quickly if
transmitting on the same frequency as a previously stored match. Under certain
circumstances, especially when using a different antenna, the memory tuning will recall a
previous match which is acceptable, but isn’t the best match possible for this situation. In
this case, forcing a full tune will cause the Z-100A to seek a better match than the match
already stored in memory.
To force a full tuning cycle press and hold the Tune button on the front panel of the Z-100A
until the Tuning/Status LED lights up, and continue holding until the Tuning/Status LED
goes out. The Tune button can be released once the Tuning/Status LED has gone out. A full
