Tks to the many users who took the trouble to respond. Comments were all positive and mentioned varied improvement in selectivity. But no one said it was "better than sliced bread". Or would be a substitute for a $5K radio, hi. Thanks to: WB6RSE WK3N AA4V KH7C N7RT N4FX AA9D and N6RK Who have all added this filter to their or a friend's rig. 73 George W8UVZ