Amateur Radio Repeater Offsets

If no message is present, then the remote base is off. If you hear non-Colorado stations working each other on voice, exchanging grid squares, then you are hearing the voice repeater from the ISS. Views Read Edit View history. Standard repeaters require either the use of two antennas one each for transmitter and receiver or a duplexer to isolate the transmit and receive signals over a single antenna. Repeating signals across widely separated frequency bands allows for simple filters to be used to allow one antenna to be used for both transmit and receive at the same time. Autopatch The repeater has an autopatch which is closed available only to designated control operators.