I'm VERY new at this so hope this question isn't off base! I have a new Baofeng UV-5R and have made my own cable to connect to it. The cable I've made is a DB9F to 3.5mm and 2.5mm plugs. The USB to serial adapter that I connect to is one that I've used with other things and works fine.
With the connectors in the radio the display comes up with a solid black dot matrix in the top frequency display and most of the info icons across the top. When I try to read the radio with CHIRP, I can see some data communication on the lights of the USB/Serial interface and the radio display changes to almost normal but then goes in to transmit mode and everything stops. I get an error indicating that "An error has occurred - Radio did not respond".
I'm hoping someone can suggest some things to look at to further troubleshoot this!
Thanks
Dan Grant