Most of the replies so far indicate a failure to read the original post *SLOWLY*. TWO preamps, one after the duplexer and then another one after a pass-reject cavity. This sounds wrong to me under any circumstances. The pass-reject cavity should have at most 1 or 2 db of loss, adding yet another preamp to the chain is going to do nothing other than decrease intermod performance.
If it were me I'd lose the preamp between the duplexer and the cavity and keep the one between the cavity and receiver. Additionally unless I was trying to reject a specific signal other than my repeater's transmitter I'd use a plain pass cavity rather than a pass-reject to get better selectivity. If a pass-reject is needed for the repeater's transmitter you really need to upgrade the duplexer. 73's Skip WB6YMH --- In [email protected], "k2aau" <k2...@...> wrote: > > I have heard of repeater owners using pre-amps on the receive side of the > duplexer and adding 1 pass-reject cavity after the preamp and placing a > pre-amp on the pass reject cavity to enhance more receive. > > Does this work or is it a myth? > > Artie > k2aau >
