Joe Subich, W4TV <lists at subich.com> wrote: > Jim Thomson wrote: >> Baffles me how SS marine xcvrs all have superb IMD...and also run on 11-15 vdc. Are they using loads of NFB ? > Yes. Along with little to no compression and making sure that the IF stages aren't over driven. Sorry, what is "NFB"? Be careful with those TLAs. :-) 73, Cathy N5WVR