Sorry for the long gap between replies, but I've been out-of-pocket for a couple of months. Anyway, my SDS-200 is still losing audio (analog and digital) while scanning. It will scan, stop on a station, but not put out any audio. I have narrowed it down to what I'll call "power cycling." My scanner is directly connected to the battery in my truck. If I'm going to be out of the truck for an extended length of time (a couple of hours), I will power the radio down with the volume control on/off switch. If I forget to shut the scanner off, when I re-start the truck the scanner power cycles -- I don't know why since like I said I have a direct connection to the battery. Sometimes, like maybe 10% of the time, the scanner will power back on in the "no audio" mode -- receiving signals but not producing audio. When I notice this, I just use the volume control power switch to let the unit write to the SD card, then power the unit back on. This process restores my audio out to normal.
When I first got this unit and this happened, the cheapo SD card Uniden provided was trashed. I replaced the crappy card with a Sandisk Extreme 32 GB SD card (red/beige) and haven't had any card failures since. Perhaps there is something wrong with my radio and the way it reads/writes to the SD card that is causing the audio to drop out after the "wrong" kind of power cycle. If no one else here has a similar issue I guess I'll call Uniden next week.
magnaculpa