Thanks, I wish I knew more about repeaters!Originally Posted by WU9G
If the combination of the pieces work (per my last post), yet the fully-connected configuration of transmitter/receiver/duplexer/antenna still has a problem: I might suspect that the duplexer is allowng enough of the transmitted signal to feed back into the receiver to overload/desensitize the receiver. That is, the duplexer isn't isolating the transmitted signal from the receiver enough. I don't know the easiest way to check this: maybe reducing the transmitter power to see it the problem disappears? Or, temporarily connecting the receiver to a physically seperate receive antenna, located at a distance from the transmit antenna, while terminating the duplexer receive port in a 50 Ohm load (to keep it happy). Or, temporarily removing the duplexer and running the repeater with separate transmitter and receiver antennas that are located at a distance from each other.
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