Ken, thanks very much for the link to Connelly's article on the MFJ-1026. It certainly gives a lot to think about and explains even better the poor results I found below 160m. I have a 1026 which I will apply Mark's mods to. I'll let all know how well it works. I have a ferocious local noise problem and this type of noise canceller may be just the ticket. 73, Rudy N6LF