--- In Repeater-Builder@yahoogroups.com, n...@... wrote: > > At 9/7/2009 09:07, you wrote: > > >If I were you, the first thing I would do is to remove the pre-amp. Then, > >put a GOOD dummy load on the output of the duplexer. Next have one of the > >helpers walk around with a handheld and go for a walk until they get noisy > >into the repeater. Next, monitor the local speaker audio and compare it > >with the repeat audio to see if they are the same. This allows you to > >determine if the antenna and feedline is working properly. > > I'm lost: how does comparing the local repeater RX speaker & repeat audio > tell you anything about the antenna system? Perhaps if you turn the TX off > & on while listening to the local audio you could hear any desense, but you > don't need repeat audio for that. > > Bob NO6B
You're right Bob. After reading that I realized that I forgot to mention to John to turn off the tx and then listen to the local speaker. The reference to the antenna and feedline performance was because I was blaming the feedline and antenna during duplex operation for the cause of the noise. I should pay closer attention. John >
