I finally got the Heil HM-12 working with the Xenyx 502 mixer so I can use my one mic for my TS-480SAT and my computer running Echolink, AllStar and D-STAR DV Dongle.  I had problems but got some help from Bob Heil himself.  Here is audio from my first two QSOs using the new setup:

Ivan from Austria


Manuel from LaPalma Canary Islands



Joe, N3FHW