On Mar 5, 2010, at 3:20 PM, George A. Thornton wrote: > > What I have observed is the narrower the filter the weirder and more > unnatural it sounds in SSB. At 1.8 you have filtered out a substantial > part of the normal SSB signal. What left can be understood but it is > not pleasant or comfortable to the ear.
Far less "weird" of course, if you just shift the passband down a bit to restore some of the low end. At 1.8, with the passband shifted, it's tight, but I don't find it necessarily unpleasant. These filters are "roofing" filters. It's the DSP that is setting receive bandwidth. 1.8Khz receive bandwidth sounds the same whether you have the 1.8, 2.1, 2.8, or or 2.8 roofing filter in the radio. If you normally operate contests with KW stations crammed closely together to the DX you're trying to hear, all shouting CQ TEST at once, the 1.8 roofing filter can be a good thing to have in the radio. If not, you can probably live without it. Grant/NQ5T ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
