MFJ-5124K/Y Radio Interface Instruction Manual
4 © 2005-2010 MFJ Enterprises, Inc.
For other Kenwood radios, the External Antenna Tuner menu in the
radio menu system must be enabled, such as the TS-450S and the TS-
690S (set jumper JP2 to the B position). If the MFJ tuner switches to
bypass mode during power on, then move jumper JP2 to the A position
because the radio is checking for a tuner presence during power on.
Refer to your radio’s operating manual for accessing the menu system
and preparing the AT-300 external antenna tuner operation. Use TS-
450S and TS-690S as an example:
a. Press and hold the [ENT] key while turning the power on.
b. Rotate the M.CH/VFO CH control to select menu number 01 on
the display.
c. Press the [UP] or [DOWN] key to change the setting to “ON.”
d. Press the [CLR] key to return to normal operation.
Operation
The operation of the MFJ-5124K radio interface is similar to the operation of the
AT-300 described in the Kenwood radio’s operating manual.
1. Press and hold the [AT TUNE] button on the radio for one second to
initiate automatic tuning process. The radio will automatically switch
to CW mode, transmit a 10-watt carrier, and start the tuning process.
When the tuning process is completed, the radio will stop transmitting,
return to its previous mode and power setting.
2. Press the [AT TUNE] button on the radio quickly to bypass the tuner
(some Kenwood radios, such as the TS-690S, do not have this bypass
function) or to cancel tuning in progress.
Note the [TUNE] button on the tuner
will not operate the Kenwood radio
interface.
To Next Page
