I have had great results with http://www.advancedreceiver.com/index1.html on My 444.750 Repeater had a nearby Lighting strike damage it not the receiver , Sent it in and they repaired it for about $ 15.00 and sent it back right away.
73 De Don KA9QJG Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/