How do I know for sure how I am getting the new model SR-89MC when I purchase it? Shawn March 03, 2017 17:23 You will be getting the newer model. The serial number should have 1408 in it rather than 1402. Related articles How do I determine built date? How do I change the power from Hi to Low? What is the difference between ASQ & SQ? Do you loose any distance or transmitting area on the SR-89MC Amateur Radio when using both the Noise Blanker & Automatic Noise Limiter? Comments 0 comments Article is closed for comments.