Will it be better to use a bandpass can or an actual preselector? I'm trying to get the NF when the line was swept so I can give it to you to see if I do need a preamp. As far as I can remember it was pretty good I just wanted to improve on it. Thanks.
Eric Lemmon <[EMAIL PROTECTED]> wrote:
Eric Lemmon <[EMAIL PROTECTED]> wrote:
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.
>
>
>
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