If the iso-coupler is bad, it may show up as a change in the antenna current, or phase if it is a directional. Check with the chief engineer to see if something has changed.
Mike - AA8K robd53154 wrote: > > > > Hi we have a Ham reptr on a tower of AM radio station and its going > through an iso coupler, how ever the receiver is getting a lot of AM > noise in it the receive is in the 448 range, is there a filter we need > to put on the recvr side or is the iso coupler possibly bad, when you > shut the AM off the repeater works just fine! > > RD >

