Hello: I am attempting to make a repeater using (2) mobile radio's. I wil be using a vertex 2500 for a receiver and a Icom IC-521 for the transmitter. The manual shows use pin 4 of the of the DB9 connector. I tried this pin with a audio signal applied but got no audio when using pin 5 and 9 (transmit). Am I doing something wrong?
Ray
Ray
