MAT-TUNER
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INSTALLATION
The mAT-125E 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 rain, dew and steam. 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.
Transceivers can use mAT-125E
Most HF transceivers can use mAT-125E. They only need to satisfy two conditions: the RF power
level can be adjusted below 20 W, and they have at least one of AM, FM, CW, FSK, RTTY modes
to output constant carrier.
It should be noted that in the tuning process, a larger VSWR is detected in the transceiver, because
the output power of the transceiver is very small, this high VSWR will not damage the transceiver.
But some transceivers in Yaesu are very sensitive to this high VSWR, and they may turn off the
transmitting carrier, which will cause the tuning to stop, you can't get a good SWR. If you happen
to use such a transceiver, we recommend that you choose another tuner, mAT-30, which has a
specially designed circuit and will not stop the tuning.
Installation
1. Connect the HF/50 MHz antenna jack on the transceiver to the “RF IN” jack on the back of
the mAT-125E, using a 50 ohm coax cable rated 120 watts or greater.
2. Connect the antenna feedline coax to the “ANTENNA” jack on the rear of the mAT-125E.
4. Grounding the mAT-125E 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 recommendsthe use of a
properly installed, high quality lightning arrestor on all antenna cables.
OPERATION
As with other general tuners, a constant RF signal of 1-20 watts power level is needed to be input
to the tuner during the tuning cycle, this signal should be CW, FM, FSK, or RTTY, it can’t be SSB.
The power level of the input RF signal must not be greater than 20 watts, otherwise it will shorten
the life of the tune, and even the tuner will be damaged. The mAT-125E have two modes of
operation: automatic and semi-automatic, for better operation, you need to know more about the
differences between the two models.
The mAT-125E have two modes of operation: automatic and semi-automatic, Users can easily
switch between the two modes of work by using multi-functional combination keys. For better
operation, you need to know more about the differences between the two models.
IMPORTANT WARNING
When the tuner is working, there is a high voltage inside. In order to
ensure personal safety, do not use it when the shell is opened!
Don't touch the antenna with your hand when the transceiver is
transmitting, it will cause burns!
