If the Shure mike is dual impedance, it will work just fine and dandy on your Yaesu. I use one with my FT1000 MKV and have been told by many my signal sounds fine. If you email me (VE7ABC@RAC.CA
, I'll look for the instuction sheet I've got and scan it and then email it to you. You will have to of course make some type of adapter up.