At 6/29/2008 22:57, you wrote: >This is why it is best to put about 1-2 db 50 ohm pad between the duplexer >and the receiver, to help keep the receive side at 50 ohm.
And degrade my system sensitivity by that same amount? No thanks. The duplexer simply has to be able to deal with the mismatch at the preamp (RX) input. Again, if there is enough margin designed into the system there should be no problem. In this case a pass cavity between the duplexer & preamp adds that extra margin, in addition to adding some protection from out of band signals & even lightning. Bob NO6B
