I am squealing like a pig!.. I have a Midland 77285-A running on a Wilson 1000 Mag mount and an astatic mic. I am wired hot to the battery. Radio is mounted under my dash and the bracket it grounded to some metal under the dash since it's plastic. My ex wife threw out my stand alone SWR meter with about $300 of other stuff before I got it from the shed. It squeals when I key up. Now.. I have tried my Uniden PC78, a cobra mike and a different wilson mag mount. NOTHING stops the squeal. I have also run the power via the cig lighter. STILL squeals. As you can see I have tried everything I can think of to no avail. oh.., the uniden has a built in SWR meter and they were fine when I checked them. that was before I grounded the mounting frame since it seems to me that it's most likely a ground issue... I am at a loss here and it's REALLY frustrating me... I never had any issues with this set up in what is now the ex's pickup. In fact when I had my One Stop tuned 99 in there I was LOUD...