Hello, Repeater transmitter is a Motorola Radius. Receiver is an HT1225 board. I've had the 4 cavity band reject Duplexer professionally aligned to the programmed frequencies. 15 watts and 1.2 on swr -with my outside mast antenna. Works well within about 500 yard radius....... Using another transmitter alone on simplex, same frequency, power(15 watts) and same Antenna, I have at least 5 mile range between base transmitter and my mobile 25 watt car transmitter. Any thoughts on what is going on here??? The only scenario Ive come to is the old Motorola is wide band and being used with new narrow band transmitters and receiver's. But even when I've reprogramed the newer radio's to wide band - very little improvement. Reception is just as bad. I have replaced all the connectors and coax..... Since the performance of the Radius repeater and simplex transmitter are so different on same antenna and power output...... If anyone has any thoughts on this problem, it will be appreciated Thank you, 301