i have never seen a 840 come without a ssb filter the am filter was optional and the tcxo was optional but the basic radio came with cw and ssb filter as standard in the uk, if its real noisy on rx somebody could have been in and turned the if gain vr up, this is something i have come across before on the 840 and 747's, boneheads turn them all the way up because they dont like the fact that the s meter is stingy compared to a cb this screws the noise level up bigtime, the reciever becomes real noisy to listen to, they aint got a clue what they are turning but hey your giving me 60db good buddy, its worth checking out, good luck with it.