You know, I really get a kick out of all the people that come on a topic just to puff out their chest and say "That's illegal" "It's not type accepted for blah blah blah". Seriously, get a life. Stop worrying about someone's radio being type accepted or not. I personally couldn't care less. Here's an idea; worry about yourself and YOUR radios.
To the OP, a lot of the Motorola bubble pack radios are designed so that they can only talk to another Motorola bubble pack radio. Meaning a non-Moto radio can't be received by a Motorola radio. I remember reading something about this somewhere else. I bet if you were to try a Cobra or some other brand it would work just fine. That's what I use, and I've never had an issue.
ohhh.kay..
Remember,,,
"Be a good operator.... Not a 'Good Buddy' j'in' fer?"