cobra 25
I saw that you said you were having trouble with a Cobra 25, What model is it? GTL, LTD, Sound Tracker etc.
They are nice little radios and if I were you I would try grounding it better, it might solve your problem.If you have it in a Ford it might be feeding back thru your speakers
The uniden 68 is a nice little radio and you should be happy with it....