Mark, did you ever receive one of those Canakit transmitters? I've gotten mine, and although I haven't tried it on 12v (only on battery) I'm very disappointed with the quality. When I adjust the frequency pot, it'll tune and then when I remove the screwdriver from the pot, I lose the transmission. I'll try to play with it more tonight and see if I can't get some better results. I'll get it hooked up on 12v and check it to see if that helps.