Thanks for the feedback everyone. On simplex my trans and receive is excellent from the base to mobile. And I regularly key a repeater about forty five miles to my west. The duplexer (DP-GMRS-50) came without documentation. I'm a newbie, trying to learn as much as I can about duplexers and repeaters and now wonder if I ran my radios into the wrong ports on the duplexer. I only tried it once and ran the transmit radio into the side marked "Low", and the receive radio into the side marked "High". Not knowing pass from reject, could I have plugged the duplexer in backwards? I've been unable to find any documentation on the XLT-50. The duplexer came pre-tuned to the center of the GMRS band (low 462.550-462.725 and high side 467.550-467.725). Not ideal but should do better than what I got. I'm still diggin' for info. Thanks again.
Bill, WRMA851