The MFJ-993B is an automatic antenna tuner for lines in coaxial cable or parallel descents. It has integrated a power meter and a SWR, a switch for two antennas and a 4: 1 balun. The range of values of impedance ranges from 6 to 1600 Ω from 1.8 to 30MHz. and 2000 memory positions are possible, thus speeding up the tuning process when working on a frequency previously used. The agreement begins as soon as the transmission power is applied, and manual agreement is also possible.
An analogue instrument shows the value of the SWR, moreover an LC display shows the SWR, the power, the frequency and other information. Very useful for the hearing impaired is the acoustic feedback on the SWR values. Max. It is 300W PEP SSB, 150W CW
The optional interface cable MFJ-5124I allows the connection of the tuner to any Icom rig with the 4-pin connector (eg IC-706, IC-7456Pro, IC-756Pro / 2/3 and many others). By this cable the tuner is controlled and powered.
The Kenwood and Yaesu devices are connected with the MFJ-5124K (Kenwood) and MFJ-5124Y (Yaesu) cables. As these rigs require more complex control, the cable includes electronic components that make it more expensive.