I have just sent in my SDS100 because after the update of firmware I just hear a kerchunk rythihmic noise on conventional. Also On my Home Patrol-2 with extreme upgrade it was working fine on trunking and last trip to San Diego trying to listen to San Diego County trunk system it no longer worked along with my 436 and 536. I tried using my Home Patrol 2, SDS 100, BCD436 & BCD536 to listen and it no longer works. I have sent all in to Uniden for repair because I am sick of dealing with it. I still really like Uniden and it is my favorite and this is not a bash Uniden blog I just want to know if anyone else is experiencing the same issue?