Y-ACC - LDG - Control Cable for LDG tuners and compatible YAESU Radios: FT-857(D), FT-897(D), FT-100, FT-100(D), FT-991(A) and FT-891. 

Description:
Interface cable between the select Yaesu radios and LDG Generic tuners. Does not supply DC to tuner. Connects between the ALC/REM or ACC stereo jack on the radio and the Radio Interface on the LDG tuner. 
   
Compatible Radios:
FT-857(D), FT-897(D), FT-100, FT-100(D), FT-991(A) and FT-891. 

Functionality:
Connect red end to radio, black end to tuner.  

Pressing the tune button on the tuner changes the mode of the radio to CW (mode change does not appear on some radio display), tunes, then returns the radio to the previous mode. The RF power is lowered while the tuner is tuning. There is no need to change RF power settings before or after tuning.

For FT-991(A), set menu item 143 (Tuner Select) to LAMP (for Linear Amp). For FT-891 set menu item 16-15 (Tuner Select) to LAMP. For both use the ALC/REM jack (red end of the Y-ACC cable goes to the radio).