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MAT-TUNER
RADIO INTERFACE CABLE
The mAT-180H's interface cable provides control signals between an Icom radio and the
automatic tuner. As the figure shows, the cable is a GX12-4 round plug, and the other is 4-pin
AH-4 interface connector. Supported Icom radios are IC-706, 703, 718, 7000, 7100, 7200, 7300,
7410, 746, 756, 7600, and any Icom radio that supports the Icom AH-3 or AH-4 tuner. Push and
hold the radio's [TUNER] button for two seconds to start the tuning process. Push [TUNER]
quickly to bypass the tuner.
The supplied radio interface cable is 50 centimeters long. If it is desired that the mAT-180H is
positioned farther from the transceiver than this cable length allows, a custom cable will need to
be constructed. This can be accomplished in two ways: Cut the supplied cable and solder a
jumper wire between all the connections, or purchase new connectors and cable to construct a
custom-length interface cable from scratch.
INSTALLATION
The mAT-180H tuner is designed for indoor operation only; it is not water resistant. If you use
it outdoors (Field Day, for example), you must protect it from the rain. Always turn your radio off
before plugging or unplugging anything. The radio may be damaged if cables are connected or
disconnected while the power is on.
Compatible Transceivers
The mAT-180H is designed to be used with any Icom 100 watt transceiver that supports the
AH-3 or AH-4 Icom antenna tuners. Currently, this includes: IC-706, 703, 718, 7000, 7100, 7200,
7300, 7410, 746, 756, 7600.
Installation
Connect the HF/50 MHz antenna jack on the transceiver to the "RF IN" jack on the back of the
mAT-180H, using a 50 ohm coax cable rated 120 watts or greater.
Connect the supplied radio interface cable to the mini-DIN 4-pin jack on the rear of the
mAT-180H, marked "Radio".
Connect the other end of this cable to the "Tuner" jack on the rear of the Icom transceiver.
Connect the antenna feedline coax to the "ANTENNA" jack on the rear of the mAT-180H.
Grounding the mAT-180H tuner will enhance its performance and safety. We recommends that
you connect your tuner to a suitable ground; a common ground rod connected to buried radials is
preferred, but a single ground rod, a cold water pipe, or the screw that holds the cover on an AC
outlet can provide a serviceable ground. We strongly recommends the use of a properly installed,
high quality lightning arrestor on all antenna cables.
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