I would like to have the aux input on the HK radio work like the CB. I use the aux input for audio from my GPS. Now I have to select listening to the GPS or the radio. I'd like to listen to the radio until there is audio from the GPS. I think I have a solution using the sidecar comm jack.
Sorry to bring up your almost one year old post. I would also like to listen to the radio until there is audio from the GPS. Did you ever get anywhere with the sidecar comm jack?