Hi Gordon. I use a Shure 526 T on my Omni D and it works great. I felt like the older Omni's needed the extra punch that you get from a transistorized mic. 73's,Woody http://community.webtv.net/wwfletcher/AMATEURRADIOBYWOODY http://community.webtv.net/wwfletcher/WOODYSFASTFAVORITES