That's a hard question to answer. Some preselectors are based upon the physical package used for mobile duplexers, and may work just fine- but they are not flexible. I prefer to use an 8 inch bandpass cavity that I can tune for almost any selectivity and insertion loss that I want. If you have a good preamp with, say, 10 dB of gain, you can set up a bandpass cavity to be extremely narrow but with 5 dB insertion loss, and you will still be far better off (+5 dB) than without the preamp and you will have reduced the vulnerability to overload and desense. At UHF, with a 5 MHz split, the playing field is a lot different from that at 2m, with a 600 kHz split.
73, Eric Lemmon WB6FLY Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
