[Repeater-Builder] Echoing

[Michael J.Talkington]

Hello,
The other day I overheard a few people talking about the local repeater echoing 
once in a while. I have heard it also and it is just random.
now one of them said that the duplexers probably need retuned as the depth of 
the notch is not enough.Has any one ever experienced this before? thanks Mike 
KC8FWD