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INSTALL
mAT-40 consists of three parts: tuner, data cable and interface cable. By matching the interface
cables of different brands, the automatic tuning can be accomplished with the instructions of the
transmitters of the relevant brands, which makes the tuning operation simple and fast.
mAT-40 is a long-wire antenna tuner. The recommended length of the antenna is 12 meters, and
the antenna of this length has the best tuning performance and transceiver efficiency. The
minimum length of the antenna supported by the tuner is 2.5 meters. If the length of the antenna is
less than 2.5 meters, good tuning can't be guaranteed at low frequencies. Short antennas have low
transmission efficiency, even if they can be tuned, but it will make communication difficult,
especially the whip antenna, which is generally used in close-range communications.
When erecting an antenna, special attention should be paid to the safety of human body and
equipment, and to keeping away from the commanding points of high-voltage wires and buildings,
so as to avoid the danger of electric shock and lightning strike. Antennas should be placed in open
areas, as far away as possible from buildings, trees and other facilities, especially other electronic
equipment.
All long-wire antennas must be connected to the ground network or ground wire, otherwise
tuning will become difficult, car and ship hull can be used as a good ground network. Do not use
gas pipelines as ground wires, which are very dangerous.
mAT-40 is designed for outdoor use. It has strong mechanical properties and reliable waterproof.
When installing, the plug connection of the radio frequency cable and the data cable should be
wrapped with waterproof tape to prevent rainwater from entering the plug. Later use to
periodically check the plug connection waterproof, to ensure good sealing, if there is any damage
to deal with in time.
The two oblong mounting holes of the bracket have a diameter of 6.6 mm. Tuners are mounted
on walls or mast, through M6 bolts or U bolts. The bolts need to be supplied and not included in
the accessories of the tuner. The spacing between the two bolts or the width of the U-bolt ranges
from 25mm to 100mm, and the mast can be 1-4 inches in diameter. Ensure that the installation is
reliable and try to keep the antenna away from nuts, bolts and mast. The bracket is made of
stainless steel, which is corrosion-resistant and salt-alkali-resistant. It can be installed in fields and
ships.
OPERATION
mAT-40 inherits all kinds of interface functions of mAT tuners in the past. Through a simple
replacement of the interface cable, you can achieve good support for different brands of radio,
become its dedicated tuner, fully support its tuning protocol, through the simple operation of the
radio panel can be good tuning. At present, mAT-40 tuner can be equipped with three kinds of
interface cables: mAT-40-M, mAT-40-Y and mAT-40-K. They support ICOM, YAESU and
KENWOOD respectively.
IMPORTANT TIPS ON POWER
The maximum power of mAT-40 in long term operation under SSB mode is 120 watts, and it can
withstand 150 watts in short time. Please do not exceed 30 watts when the digital mode of RTTY and FSK
launches for a long time. Too high RF power may cause damage to tuner.
If manual tuning mode is used, the tuning power is recommended to be 5-10 watts and a minimum of
0.5 watts, so the tuner can be well supported for small power devices such as YAESU FT-817. The
maximum tuning power should not exceed 20 watts, otherwise it will shorten the life of the tuner or even
damage it. For some DIY devices, because there is no good protection function, at high SWR time, The
tuning power should be reduced as far as possible so as not to cause damage to these devices.
