I was curious about something and thought yall can help. When 2 radios are close together and one xmits, the other squeals until theyre further apart. We all know that. My question is how does that happen with a repeater? If I xmit on 158.xxxx and Rx on 154.xxxx, how would the other radio still squeal if they are close if Im not using simplex? this happened to one of our firefighters using a mobile with his handheld on in the cab and I don't understand. Our radios I use at my full time job are on repeater also but they only pick up their voice when close to another and you get that echo effect but not the annoying squeal. Does it have to do with digital / analog or what?