Terry
What is the age or s/n of the unit. Seems I heard they weren't supporting really old units any more. A replacement radio is on my wish list, I can hear Minneapolis Center AND a local AWOS on 116.50 on the nav side of my 170B. Alan
Alan,
You heard correct. I thought I had a problem with my MX300. Gave them the S/N and said they no longer supported it but I could buy an upgraded model.
Found someone in the STL area that was an Avionics tech at McConnell/Douglas and he looked it over for me.