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mAT-705
Automatic Tuner for ICOM IC-705 Transceiver
Instruction Manual Version V1.0
INTRODUCTION
The mAT-705 is a compact antenna tuner designed for ICOM IC-705 transceiver. The tuner
connects directly to the TUNER socket of the IC-705 through a dedicated control cable mAT-705-
CB supplied as a standard accessory of the tuner.
The tuner uses an all-aluminum metal shell. Front panel uses aluminum milling technology and
laser engraving. Water-resistant but not water-proof, suitable for outdoor portable use.
The mAT-705 tuner is powered by a standard 9V alkaline battery, convenient for users to replace
and for air transportation. Magnetic latching relays are used inside the tuner to save energy and
inhibit the need for battery replacement. Consumes zero power when turned off. When powered
off, retains the last frequency setting used and will be ready to operate when powered back on.
In addition to the tuner, the mAT-705 package includes control cable mAT-705-CB, and L-shaped
wrench (for opening the case for battery replacement). The user manual latest version can
downloaded directly from our web page, we no longer provide paper user manuals.
The tuner comes with control cable mAT-705-CB. Both ends of the control cable are standard
3.5mm plugs. One side is connected to the TUNER socket of the transmitter, and the other plug is
connected to the CON socket of the tuner. The transceiver controls the tuner through this cable for
automatic tuning. An RF cable mAT-RC1 that connects the Icom 705 and the tuner is sold as an
accessory item. mAT-RC1 is a common coaxial cable with male BNC plugs at both ends.
The tuner operates from 1.8 MHz to 54 MHz with a impedance matching range of 5-1500 ohms.
The mAT-705 has 16,000 frequency memories. When tuning on or near a previously tuned
frequency the mAT-705 uses “Memory Tune” to recall the previous tuning parameters in a fraction
of a second. If no memorized settings are available, the tuner runs a full tuning cycle, storing the
parameters for memory recall on subsequent tuning cycles on that frequency. In this manner, the
mAT-705 “learns” as it is used, adapting to the bands and frequencies as it goes.
SPECIFICATIONS
- 1.8 to 54.0 MHz coverage.16,000 memories for instantaneous frequency
- Tuning time: 0.1 to 5 seconds full tune, 0.1 seconds memory tune.
- Impedance range: 5-1500ohm.
- For dipoles, verticals, Vees, beams, long wire or any coax-fed antenna.
- Powered by 9V alkaline battery
- Dimensions: 14cm x 6.7cm x 2.8cm, max 15.1cm x 6.7cm x 2.8cm (L x W x H).
- Weight: 250g, gross weight 500g.
IMPORTANT INFORMATION
This tuner is specially designed for ICOM IC-705 transmitter. If used in other
transmitters, it may not work, or even damage the tuner or transmitter. Don't try
to use it with other types of transmitters.
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FRONT PANEL
The front panel of the mAT-705 is shown in the figure below. There are two indicator lights and a
power switch. Set to ‘1’ to power the tuner off, ‘0’ to power off. When the power switch is set
to ‘0’, no power drain is realized from the 9V battery.
Function of indicator light:
1) The left side marked "PWR" is the power indicator. When the power switch is turned on, this
green indicator light is lit. It should be noted that if this indicator flashes when the machine is
turned on, it means that the battery power is low and the battery needs replacement.
2) The "ACT/TUN" on the right is the status indicator. When it is off, it means the tuner is in the
“Bypass” state; when it is lit in green, it means the tuner is in the “ONLINE” state; when it is
lit in red, it means the tuner is in the process of tuning.
REAR PANEL
There are two female BNC RF sockets and one control cable socket on the rear panel of the tuner.
As shown in the figure below.
Control cable socket: The tuner comes with control cable mAT-705-CB. The ICOM IC-705
transmitter sends control commands to the tuner through this control cable to control the tuner to
complete the tuning operation. One plug of the control cable is plugged into the socket marked
"CON" on the rear panel, and the other plug is plugged into the "TUNER" socket of the transceiver.
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When connecting this cable please make sure the transceiver and tuner are turned off.
BNC RF sockets: There are two female BNC RF sockets on the rear panel, “ANT " and "RF IN”.
"ANT" is connected to the antenna. “RF IN" is connected to the antenna socket of the transceiver
via a 50 ohm coaxial cable. The coaxial cable mAT-705-RC1 connecting the tuner "RF IN" and
the transceiver antenna jack is an optional accessory not supplied with the tuner.
INSTALLATION
Installation of the tuner is simple. Please make sure that the power for transceiver and tuner are
turned off before installation.
1. Connect the “CON" of the tuner and the "TUNER” socket of the transmitter with control cable.
Please make sure that the control cable plug is inserted in place and the cable connection is good.
2. Connect the "RF IN" of the tuner and the antenna socket of the transmitter with a 50 ohm coaxial
cable.
3. Connect the coaxial cable connecting your antenna to the socket marked “ANT” on the tuner.
The installation is complete.
TUNING OPERATION (TWO METHODS):
Method 1:
Enter the function menu of the transmitter, as
shown in the figure, the [TUNER] option turns
white to indicate that it is available.
Quickly touch [TUNER] to switch the tuner to "BYPASS" state. Touch for more than 1 second to
start tuning and set the tuner to "ONLINE". When the tuner is tuning, in addition to the "ACT/TUN"
indicator on the front panel lights up in red, the red text "TUNE" will flash on the transmitter screen.
After the tuner completes the tuning cycle, when it is online, the white text "TUNE" will always be
lit on the transmitter screen, except for the "ACT/TUN" indicator on the front panel that lights up
green. as the picture shows.
Method 2: RF-sensed tuning. The "PTT TUNE" function of the IC-705 transmitter is turned on
by default. When the transceiver is set to a new frequency, the transmitter will automatically start
tuning when the user presses PTT for the first time. This method of starting the tuning cycle is more
common. When the user wants to start a tuning cycle again on the current frequency (having not
changed frequency from the last time a tuning cycle was actuated), you will need to use Method 1
for tuning. RF-sensing will not re-activate on the same frequency you just used to tune the tuner.
BATTERY
The tuner uses a standard 9V alkaline battery. Usually alkaline batteries have been installed inside
the tuner, you can use the tuner directly. But because of the requirements of some countries or
regions, the tuner you get may not include alkaline batteries. Before you buy the tuner, please contact
your seller to confirm whether the tuner you plan to buy has been installed with alkaline batteries.
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BATTERY LIFE INDICATOR
If the "PWR" indicator of the tuner flashes when the power is turned on, it indicates that the battery
is low and needs to be replaced. Changing the battery or installing the battery is simple. Use the L-
shaped wrench that comes with the tuner to remove the four black screws on the rear panel. Gently
pull out the PCB and replace the battery. Insert the PCB back into the shell, and then tighten the
screws on the rear panel to complete. Check battery polarity when installing.
CONTROL CABLE
The control cable is a standard accessory of the tuner, which is provided with the tuner and does not
require additional purchase by the user. Please use the cable that comes with the tuner. Using other
cables may cause the tuner to not work properly. If your tuner does not work normally, please first
check whether the control cable is well connected and whether the cable plug is inserted in place.
TECHNICAL SUPPORT
Visit the Support Center at: http://www.mat-tuner.com/
PRODUCT FEEDBACK
We encourage product feedback! Tell us what you think of your product. In an
email tell us how you used the product and how well it worked in your application. We ’ll share
your comments with our staff, our dealers, and other customers at the website.
Welcome to http://www.mat-tuner.com/ for more information
BG3MZU
September 20, 2020
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