At 11/26/2009 10:08, you wrote:
>So what is the recommendation to set the loss of the BP cavity? I have a >setting as to 3 db, 1 Db, .5 Db Etc. Running the ARR preamp on a UHF >repeater, it seems the preamp is a little too much and we get a little >desense. I am only running a 4 cavity duplexer and a notch cavity with the >preamp. How much isolation do you get out of the duplexer? If it's less than 80 dB, you might need additional filtering on the TX, since phase noise is the usual cause of desense when duplexer isolation is insufficient. Bob NO6B
