The NQN BCB filter knocks out all problems - well except for the 2nd harmonic of the 945KHz feed which sometimes turns up for a day or so.
I can't think of a single reason not to try one if you have BCB, they are cheaper than almost any rig accessory you're likely to buy!
73 Chris, G3SVL _________________ Topband Reflector Archives - http://www.contesting.com/_topband