Are you certain that a "preselector preamp" is appropriate for your application? By definition, a preselector is a rather broadly tuned device that may allow a band of signals several MHz wide to get to the radio's front end. Such devices may not provide the narrow bandpass needed to protect a preamp from overload by nearby transmitters, or to limit the amount of noise getting into the preamp.
It may be better to install a couple of 8-inch bandpass cavities, each set for 0.5 dB insertion loss, ahead of the preamp. This will allow only a few tens of kHz each side of the receive frequency to reach the preamp, which can then be optimized for the amount of gain needed. Some very good information on this topic is available here: <www.anglelinear.com/repeaters/repeaters.html> 73, Eric Lemmon WB6FLY <snip> At 07:40 PM 12/22/06, you wrote: > Hey Vincent Thanks. I know about ARR for preamps but I'm looking for a Preselector Preamp like the old GLB units.. <snip>
