Probably a setting. Best to have me program it, or have Mark or I use a cloning cable to clone it. Some radios, including Vertex and Icom as well, have a setting that allows for a beep or click to signal transmission start or stop. This is generally set when using the radios with some type of computer or internet link (IRLP). Just guessing at this time, but it sounds like somehow this may have been set on your radio. I had something similar to that happen with my VX-170 several years ago. If I reprogram the radio it may wipe out that setting. Might be setting #39 which is a CB "roger" beep. Make sure it is set to off.