Adding a preamp to some repeater systems does not always make it "hear" better; sometimes the receiver becomes more sensitive to overload, intermod, desense, and has a higher noise level. You can mitigate some of these problems by placing a bandpass cavity immediately in front of the preamp.
Most bandpass/bandreject duplexers have surprisingly little bandpass effect, and will pass an awful lot of signal on either side of the receive frequency. A dedicated bandpass cavity will act as a preselector to greatly limit the signal seen by the preamp, and that will significantly reduce the noise floor. 73, Eric Lemmon WB6FLY uplink28 wrote: > > I'm thinking about putting a receiver preamp in our system. Any words > of advice from anyone would be greatly appreciated. Brand, model, etc. > If you ahve one for sale let me know too. Thanks. > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
