The Heil CC-1 XLR Y-BALis a special optimized microphone cable for these transceivers:

Each of these transceivers have a balanced microphone circuit just like commercial broadcast and Heil PRO Audio gear, but Yaesu mic connections unbalances that balanced input and does NOT ground the mic shield to the chassis. So you end up with a nice floating antenna called a microphone cable that in some cases cause RFI and distortion when using 3 pin XLR balanced microphones.

This cable is expressly for the Yaesu models listed above, when using theHeil PRseries microphones that use three pin XLR connectors such as the balanced 600 ohm PR781, PR20, PR30, PR31BW, PR40, etc. This only works on the late model FT-9000, FT-5000, FT-2000, FT-1000MkV and the FT-950. You should continue to use the CC-1 XLR-Y (Yellow Top) cable for all other Yaesu models with any Heil 3 pin balanced output PRO microphones.

The Heil CC-1 XLR Y-BAL has an orange cover on the 3 pin XLR and terminates to the standard round 8 pin Foster connector and has a ¼" PTT pig tail.